sfrench/cifs-2.6.git
10 years agoMerge tag 'davinci-fixes-for-v3.15-rc4' of git://git.kernel.org/pub/scm/linux/kernel...
Olof Johansson [Mon, 26 May 2014 21:55:53 +0000 (14:55 -0700)]
Merge tag 'davinci-fixes-for-v3.15-rc4' of git://git./linux/kernel/git/nsekhar/linux-davinci into next/drivers

The patch fixes EDMA crossbar mapping to actually
make it work. The patch has been tagged for stable.

* tag 'davinci-fixes-for-v3.15-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/nsekhar/linux-davinci:
  ARM: common: edma: Fix xbar mapping

10 years agoMerge tag 'omap-for-v3.16/l3-noc-signed' of git://git.kernel.org/pub/scm/linux/kernel...
Olof Johansson [Mon, 26 May 2014 20:29:22 +0000 (13:29 -0700)]
Merge tag 'omap-for-v3.16/l3-noc-signed' of git://git./linux/kernel/git/tmlind/linux-omap into next/drivers

Merge "ARM: omap l3-noc bus driver changes for v3.16 merge window, resend" from
Tony Lindgren:

Improvments to omap l3-noc bus driver for v3.16 merge window
to add support for am347x and dra7.

* tag 'omap-for-v3.16/l3-noc-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap: (25 commits)
  bus: omap_l3_noc: Add AM4372 interconnect error data
  bus: omap_l3_noc: Add DRA7 interconnect error data
  bus: omap_l3_noc: introduce concept of submodule
  bus: omap_l3_noc: Add information about the context of operation
  bus: omap_l3_noc: add information about the type of operation
  bus: omap_l3_noc: ignore masked out unclearable targets
  bus: omap_l3_noc: improve readability by using helper for slave event parsing
  bus: omap_l3_noc: make error reporting and handling common
  bus: omap_l3_noc: fix masterid detection
  bus: omap_l3_noc: convert flagmux information into a structure
  bus: omap_l3_noc: use of_match_data to pick up SoC information
  bus: omap_l3_noc: Add support for discountinous flag mux input numbers
  bus: omap_l3_noc: convert target information into a structure
  bus: omap_l3_noc: move L3 master data structure out
  bus: omap_l3_noc: un-obfuscate l3_targ address computation
  bus: omap_l3_noc: switch over to relaxed variants of readl/writel
  bus: omap_l3_noc: populate l3->dev and use it
  bus: omap_l3_noc: remove iclk from omap_l3 struct
  bus: omap_l3_noc: rename functions and data to omap_l3
  bus: omap_l3_noc: Fix copyright information
  ...

Signed-off-by: Olof Johansson <olof@lixom.net>
10 years agosoc: qcom: fix of_device_id table
Arnd Bergmann [Mon, 26 May 2014 16:07:05 +0000 (18:07 +0200)]
soc: qcom: fix of_device_id table

The match tables must be zero-terminated, and Kbuild now helpfully
fails to link the kernel if that isn't the case.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
10 years agoDocumentation: sysfs: add Broadcom GISB arbiter sysfs properties
Florian Fainelli [Mon, 19 May 2014 20:06:01 +0000 (13:06 -0700)]
Documentation: sysfs: add Broadcom GISB arbiter sysfs properties

This patch documents the sysfs properties exposed by the Broadcom GISB
bus arbiter hardware.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
10 years agoDocumentation: devicetree: add Broadcom GISB arbiter bindings
Florian Fainelli [Mon, 19 May 2014 20:06:00 +0000 (13:06 -0700)]
Documentation: devicetree: add Broadcom GISB arbiter bindings

This patch adds the Broadcom GISB arbiter Device Tree binding that is
used on all Broadcom Set-top-box System-on-a-chip.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
10 years agobus: add Broadcom GISB bus arbiter timeout/error handler
Florian Fainelli [Mon, 19 May 2014 20:05:59 +0000 (13:05 -0700)]
bus: add Broadcom GISB bus arbiter timeout/error handler

This patch adds support for the Broadcom GISB arbiter bus timeout/error
handler. GISB is a proprietary bus used by Broadcom Set Top Box
System-on-a-chip devices (BCM7xxx) which allows multiple masters and
clients to be interfaced with each other.

The bus arbiter offers support for generating two interrupts towards the
host CPU, thus allowing us to "catch" clock gated masters, or masters
being volontarily blocked for powersaving purposes, or do general system
troubleshooting.

We also register a hook with the ARM fault exception handling to allow
printing a more informative message than "imprecise external abort at
0x00000000" for instance.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
10 years agoMerge tag 'sunxi-drivers-for-3.16-2' of https://github.com/mripard/linux into next...
Arnd Bergmann [Fri, 23 May 2014 22:46:39 +0000 (00:46 +0200)]
Merge tag 'sunxi-drivers-for-3.16-2' of https://github.com/mripard/linux into next/drivers

Allwinner drivers changes for 3.16, take 2

Add reset driver for the A31

* tag 'sunxi-drivers-for-3.16-2' of https://github.com/mripard/linux:
  power: reset: Add Allwinner A31 reset code

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
10 years agoMerge tag 'qcom-drivers-for-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git...
Arnd Bergmann [Fri, 23 May 2014 22:45:58 +0000 (00:45 +0200)]
Merge tag 'qcom-drivers-for-3.16' of git://git./linux/kernel/git/galak/linux-qcom into next/drivers

Qualcomm ARM Based driver Updates for v3.16

* Introduce drivers/soc directory for misc SoC specific code
* Add driver to configure GSBI device

* tag 'qcom-drivers-for-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/galak/linux-qcom:
  soc: qcom: Add GSBI driver
  soc: Introduce drivers/soc place-holder for SOC specific drivers

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
10 years agosoc: qcom: Add GSBI driver
Andy Gross [Thu, 24 Apr 2014 16:31:21 +0000 (11:31 -0500)]
soc: qcom: Add GSBI driver

The GSBI (General Serial Bus Interface) driver controls the overarching
configuration of the shared serial bus infrastructure on APQ8064, IPQ8064, and
earlier QCOM processors.  The GSBI supports UART, I2C, SPI, and UIM
functionality in various combinations.

Signed-off-by: Andy Gross <agross@codeaurora.org>
Signed-off-by: Kumar Gala <galak@codeaurora.org>
10 years agosoc: Introduce drivers/soc place-holder for SOC specific drivers
Santosh Shilimkar [Wed, 23 Apr 2014 23:46:17 +0000 (19:46 -0400)]
soc: Introduce drivers/soc place-holder for SOC specific drivers

Based on earlier thread "https://lkml.org/lkml/2013/10/7/662" and
discussion at Kernel Summit'2013, it was agreed to create
'driver/soc' for drivers which are quite SOC specific.

Further discussion on the subject is in response to
the earlier version of the patch is here:
http://lwn.net/Articles/588942/

Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Kumar Gala <galak@codeaurora.org>
Cc: Paul Walmsley <paul@pwsan.com>
Cc: Olof Johansson <olof@lixom.net>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Sandeep Nair <sandeep_n@ti.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Kumar Gala <galak@codeaurora.org>
10 years agopower: reset: Add Allwinner A31 reset code
Maxime Ripard [Wed, 7 May 2014 02:44:20 +0000 (21:44 -0500)]
power: reset: Add Allwinner A31 reset code

That code used to be in the machine code, but it's more fit here with other
restart hooks.

That will allow to cleanup the machine directory, while waiting for a proper
watchdog driver for the A31.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
10 years agoMerge tag 'samsung-drivers' of http://git.kernel.org/pub/scm/linux/kernel/git/kgene...
Olof Johansson [Thu, 22 May 2014 05:32:57 +0000 (22:32 -0700)]
Merge tag 'samsung-drivers' of git./linux/kernel/git/kgene/linux-samsung into next/drivers

Merge "Samsung driver update for 3.16" from Kukjin Kim:

exynos_mct update for v3.16

- register sched_clock callback to use clocksource mct-frc

* tag 'samsung-drivers' of http://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung:
  clocksource: exynos_mct: register sched_clock callback

Signed-off-by: Olof Johansson <olof@lixom.net>
10 years agoMerge branch 'sunxi/drivers-for-3.16' of https://github.com/mripard/linux into next...
Olof Johansson [Wed, 21 May 2014 21:42:56 +0000 (14:42 -0700)]
Merge branch 'sunxi/drivers-for-3.16' of https://github.com/mripard/linux into next/drivers

Merge "Allwinner drivers changes for 3.16" from Maxime Ripard:

Reset drivers for the A31, that have been merged with reset maintainer's
Acked-by.

* 'sunxi/drivers-for-3.16' of https://github.com/mripard/linux:
  reset: sunxi: allow MFD subdevices probe
  reset: sunxi: document sunxi's reset controllers bindings

Signed-off-by: Olof Johansson <olof@lixom.net>
10 years agoMerge tag 'mvebu-drivers-3.16' of git://git.infradead.org/linux-mvebu into next/drivers
Olof Johansson [Tue, 20 May 2014 04:52:18 +0000 (21:52 -0700)]
Merge tag 'mvebu-drivers-3.16' of git://git.infradead.org/linux-mvebu into next/drivers

Merge "ARM: mvebu: driver changes for v3.16" from Jason Cooper:

mvebu driver changes for v3.16

 - mvebu-devbus
    - changes need to add support for the orion5x platform

* tag 'mvebu-drivers-3.16' of git://git.infradead.org/linux-mvebu:
  memory: mvebu-devbus: add a devbus, keep-config property
  memory: mvebu-devbus: add Orion5x support
  memory: mvebu-devbus: split functions
  memory: mvebu-devbus: use _SHIFT suffixes instead of _BIT
  memory: mvebu-devbus: use ARMADA_ prefix in defines
  ARM: orion5x: fix target ID for crypto SRAM window
  memory: mvebu-devbus: fix the conversion of the bus width

Signed-off-by: Olof Johansson <olof@lixom.net>
10 years agoreset: sunxi: allow MFD subdevices probe
Boris BREZILLON [Wed, 14 May 2014 12:38:16 +0000 (14:38 +0200)]
reset: sunxi: allow MFD subdevices probe

The current implementation uses sunxi_reset_init function for both early
init and platform device probe.

The sunxi_reset_init function uses DT to retrieve device resources, which
will be an issue if reset controllers are registered from an MFD device
that define resources from mfd_cell definition.

Moreover, we can make of devm functions when we're in the probe context.

Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
10 years agoreset: sunxi: document sunxi's reset controllers bindings
Boris BREZILLON [Wed, 14 May 2014 12:38:15 +0000 (14:38 +0200)]
reset: sunxi: document sunxi's reset controllers bindings

Add DT bindings documentation for sunxi's reset controllers.

Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
10 years agoMerge tag 'socfpga-driver-update-for-3.16' of git://git.rocketboards.org/linux-socfpg...
Olof Johansson [Mon, 5 May 2014 22:13:33 +0000 (15:13 -0700)]
Merge tag 'socfpga-driver-update-for-3.16' of git://git.rocketboards.org/linux-socfpga-next into next/drivers

Merge "drivers: Add reset driver for SOCFPGA" from Dinh Nguyen:

Add a reset driver for the SOCFPGA platform.

* tag 'socfpga-driver-update-for-3.16' of git://git.rocketboards.org/linux-socfpga-next:
  reset: add driver for socfpga

Signed-off-by: Olof Johansson <olof@lixom.net>
10 years agobus: omap_l3_noc: Add AM4372 interconnect error data
Afzal Mohammed [Mon, 2 Dec 2013 12:18:57 +0000 (17:48 +0530)]
bus: omap_l3_noc: Add AM4372 interconnect error data

Add AM4372 information to handle L3 error.

AM4372 has two clk domains 100f and 200s. Provide flagmux and data
associated with it.

NOTE: Timeout doesn't have STDERRLOG_MAIN register. And per hardware
team, L3 timeout error cannot be cleared the normal way (by setting
bit 31 in STDERRLOG_MAIN), instead it may be required to do system
reset. L3 error handler can't help in such scenarios.

Hence indicate timeout target offset as L3_TARGET_NOT_SUPPORTED as
done for undocumented bits.

Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
Signed-off-by: Afzal Mohammed <afzal@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: Darren Etheridge <detheridge@ti.com>
Tested-by: Sekhar Nori <nsekhar@ti.com>
10 years agobus: omap_l3_noc: Add DRA7 interconnect error data
Rajendra Nayak [Thu, 10 Apr 2014 16:33:13 +0000 (11:33 -0500)]
bus: omap_l3_noc: Add DRA7 interconnect error data

DRA7 is distinctly different from OMAP4 in terms of masters and clock
domain organization. There two main clock domains which is divided as
follows:
     <0x44000000 0x1000000> is clk1 and clk2 is the sub clock domain
     <0x45000000 0x1000> is clk3

Add all the data needed to handle L3 error handling on DRA7 devices
and mark clk2 as subdomain and provide a compatible flag for
functionality. Other than the data difference the hardware blocks
involved are essentially the same.

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
[nm@ti.com: bugfixes and generic improvements, documentation]
Signed-off-by: Nishanth Menon <nm@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: Darren Etheridge <detheridge@ti.com>
Tested-by: Sekhar Nori <nsekhar@ti.com>
10 years agobus: omap_l3_noc: introduce concept of submodule
Nishanth Menon [Fri, 11 Apr 2014 19:37:03 +0000 (14:37 -0500)]
bus: omap_l3_noc: introduce concept of submodule

While OMAP4 and OMAP5 had 3 separate clock domains, DRA7 has only 2
and the first one then is internally divided into 2 sub clock domains.

To better represent this in the driver, we use the concept of submodule.

The address defintions in the devicetree is as per the high level
clock domain(module) base, the sub clockdomain/subdomain which shares
the same register space of a clockdomain is marked in the SoC data as
L3_BASE_IS_SUBMODULE.

L3_BASE_IS_SUBMODULE is used as an indication that it's base address is
the same as the parent module and offsets are considered from the same
base address as they are usually intermingled.

Other than the base address, the submodule is same as a module as it is
functionally so.

Signed-off-by: Nishanth Menon <nm@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: Darren Etheridge <detheridge@ti.com>
Tested-by: Sekhar Nori <nsekhar@ti.com>
10 years agobus: omap_l3_noc: Add information about the context of operation
Nishanth Menon [Wed, 16 Apr 2014 22:23:33 +0000 (17:23 -0500)]
bus: omap_l3_noc: Add information about the context of operation

L3 error may be triggered using Debug interface (example JTAG) or
due to other errors, for example an opcode fetch (due to function
pointer or stack corruption) or a data access (due to some other
failure). NOC registers contain additional information to help aid
debug information.

With this, we can enhance the error information to more detailed form:
"
L3 Custom Error: MASTER MPU TARGET L4PER2 (Read): Data Access in User mode
during Functional access
"

Signed-off-by: Nishanth Menon <nm@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: Darren Etheridge <detheridge@ti.com>
Tested-by: Sekhar Nori <nsekhar@ti.com>
10 years agobus: omap_l3_noc: add information about the type of operation
Nishanth Menon [Wed, 16 Apr 2014 20:47:28 +0000 (15:47 -0500)]
bus: omap_l3_noc: add information about the type of operation

Today we get error such as
L3 Custom Error: MASTER MPU TARGET L4PER2

But since the actual instruction triggerring the error Vs the point
at which we report error may not be aligned, it makes sense to try
and provide additional information - example the type of operation
that was attempted to being performed can help narrow the debug down
further.

This helps provide log such as:
L3 Custom Error: MASTER MPU TARGET L4PER2 (Read)

Signed-off-by: Nishanth Menon <nm@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: Darren Etheridge <detheridge@ti.com>
Tested-by: Sekhar Nori <nsekhar@ti.com>
10 years agobus: omap_l3_noc: ignore masked out unclearable targets
Afzal Mohammed [Fri, 25 Apr 2014 22:38:11 +0000 (17:38 -0500)]
bus: omap_l3_noc: ignore masked out unclearable targets

Errors that cannot be cleared (determined by reading REGERR register)
are currently handled by masking it. Documentation states that REGERR
"Checks which application/debug error sources are active" - it does not
indicate that this is "interrupt status" - masked out status represented
eventually in the irq line to MPU.
For example:

Lets say module 0 bit 8(0x100) was unclearable, we do the mask it from
generating further errors. However in the following cases:
a) bit 9 of Module 0
OR
b) any bit of Module 1+
occur, the interrupt handler wrongly assumes that the raw interrupt
status of module 0 bit 8 is the root cause of the interrupt, and
returns. This causes unhandled interrupt and resultant infinite
interrupts.

Fix this scenario by storing the events we masked out and masking raw
status with masked ones before identifying and handling the error.

Reported-by: Vaibhav Hiremath <hvaibhav@ti.com>
Signed-off-by: Afzal Mohammed <afzal@ti.com>
Tested-by: Vaibhav Hiremath <hvaibhav@gmail.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Tested-by: Sekhar Nori <nsekhar@ti.com>
10 years agobus: omap_l3_noc: improve readability by using helper for slave event parsing
Nishanth Menon [Thu, 17 Apr 2014 17:33:50 +0000 (12:33 -0500)]
bus: omap_l3_noc: improve readability by using helper for slave event parsing

Current interrupt handler does the first level parse to identify the
slave and then handles the slave even identification, reporting and
clearing of event as well. It is hence logical to split the handler
into two where the primary handler just parses the flagmux till it
identifies a slave and the slave handling, reporting and clearing is
done in a helper function.

While at it update the documentation in kerneldoc style.

Signed-off-by: Nishanth Menon <nm@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: Darren Etheridge <detheridge@ti.com>
Tested-by: Sekhar Nori <nsekhar@ti.com>
10 years agobus: omap_l3_noc: make error reporting and handling common
Nishanth Menon [Fri, 11 Apr 2014 17:24:56 +0000 (12:24 -0500)]
bus: omap_l3_noc: make error reporting and handling common

The logic between handling CUSTOM_ERROR and STANDARD_ERROR is just the
reporting style.

So make it generic, simplify and standardize the reporting with both
master and target information printed to log.

Handle the register address difference for master code for standard
error and custom error as well.

While at it, fix a minor indentation error.

Signed-off-by: Nishanth Menon <nm@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: Darren Etheridge <detheridge@ti.com>
Tested-by: Sekhar Nori <nsekhar@ti.com>
10 years agobus: omap_l3_noc: fix masterid detection
Nishanth Menon [Wed, 16 Apr 2014 16:01:02 +0000 (11:01 -0500)]
bus: omap_l3_noc: fix masterid detection

As per Documentation (OMAP4+), then masterid is infact encoded as
follows:
"L3_TARG_STDERRLOG_MSTADDR[7:0] STDERRLOG_MSTADDR stores the NTTP
master address. The master address is the concatenation of Prefix &
Initiator ConnID. It is defined on 8 bits. The 6 MSBs are used to
distinguish the different initiators."

So, when we matchup currently with the master ID list, we never get a
proper match other than when MPU is the master (thanks to 0).

Now, on other platforms such as AM437x, this tends to be bits[5:0].

Fix this by using the relevant 6MSBits to identify the master ID for
standard and custom errors.

Reported-by: Darren Etheridge <detheridge@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: Darren Etheridge <detheridge@ti.com>
Tested-by: Sekhar Nori <nsekhar@ti.com>
10 years agobus: omap_l3_noc: convert flagmux information into a structure
Nishanth Menon [Mon, 14 Apr 2014 14:57:50 +0000 (09:57 -0500)]
bus: omap_l3_noc: convert flagmux information into a structure

This allows us to encompass target information and flag mux offset that
points to the target information into a singular structure. This saves
us the need to look up two different arrays indexed by module ID for
information.

This allows us to reduce the static target information allocation to
just the ones that are documented.

Signed-off-by: Nishanth Menon <nm@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: Darren Etheridge <detheridge@ti.com>
Tested-by: Sekhar Nori <nsekhar@ti.com>
10 years agobus: omap_l3_noc: use of_match_data to pick up SoC information
Sricharan R [Tue, 26 Nov 2013 13:38:23 +0000 (07:38 -0600)]
bus: omap_l3_noc: use of_match_data to pick up SoC information

DRA7xx SoC has the same l3-noc interconnect ip (as OMAP4 and OMAP5), but
AM437x SoC has just 2 modules instead of 3 which other SoCs have.

So, stop using direct access of array indices and use of->match data and
simplify implementation to benefit future usage.

While at it, rename a few very generic variables to make them omap
specific. This helps us differentiate from DRA7 and AM43xx data in the
future.

NOTE: None of the platforms that use omap_l3_noc are non-device tree
anymore. So, it is safe to assume OF match here.

Signed-off-by: Sricharan R <r.sricharan@ti.com>
Signed-off-by: Rajendra Nayak <rnayak@ti.com>
[nm@ti.com: split, refactor and optimize logic]
Signed-off-by: Nishanth Menon <nm@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: Darren Etheridge <detheridge@ti.com>
Tested-by: Sekhar Nori <nsekhar@ti.com>
10 years agobus: omap_l3_noc: Add support for discountinous flag mux input numbers
Rajendra Nayak [Thu, 10 Apr 2014 16:31:33 +0000 (11:31 -0500)]
bus: omap_l3_noc: Add support for discountinous flag mux input numbers

On DRA7, unlike on OMAP4 and OMAP5, the flag mux input numbers used
to indicate the source of errors are not continous. Have a way in the
driver to catch these and WARN the user of the flag mux input thats
either undocumented or wrong.

In the similar vein, Timeout errors in AM43x can't be cleared per h/w
team, neither does it have a STDERRLOG_MAIN to clear the error.

Further, the mux bit offset might not even be indexed into our array
of known mux input description, in which case we'd have a abort.

So, define a static range check for bit description and any definition
which has target_name set to NULL (the ones that are not populated or
ones that are specifically marked in the case of discontinous input
numbers), can handle the same gracefully. Upon occurance of error from
such sources, mask it. Otherwise, we'd have an infinite interrupt
source without any means to clear it.

NOTE: follow on patch ensures that these masked bits are ignored.

[nm@ti.com: rebase, squash and improve]
Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Afzal Mohammed <afzal@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: Darren Etheridge <detheridge@ti.com>
Tested-by: Sekhar Nori <nsekhar@ti.com>
10 years agobus: omap_l3_noc: convert target information into a structure
Nishanth Menon [Fri, 11 Apr 2014 16:38:10 +0000 (11:38 -0500)]
bus: omap_l3_noc: convert target information into a structure

Currently the target instance information is organized indexed by bit
field offset into multiple arrays.

1. We currently have offsets specific to each target associated with each
clock domains are in seperate arrays:

l3_targ_inst_clk1
l3_targ_inst_clk2
l3_targ_inst_clk3

2. Then they are organized per master index in l3_targ.

3. We have names in l3_targ_inst_name as an array to array of strings
corresponding to the above with offsets.

Simplify the same by defining a structure for information containing
both target offset and name. this is then stored in arrays per domain
and organized into an array indexed off domain.

The array is still indexed based on bit field offset.

Signed-off-by: Nishanth Menon <nm@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: Darren Etheridge <detheridge@ti.com>
Tested-by: Sekhar Nori <nsekhar@ti.com>
10 years agobus: omap_l3_noc: move L3 master data structure out
Nishanth Menon [Fri, 11 Apr 2014 15:11:59 +0000 (10:11 -0500)]
bus: omap_l3_noc: move L3 master data structure out

Move the L3 master structure out of the static definition to enable
reuse for other SoCs.

Signed-off-by: Nishanth Menon <nm@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: Darren Etheridge <detheridge@ti.com>
Tested-by: Sekhar Nori <nsekhar@ti.com>
10 years agobus: omap_l3_noc: un-obfuscate l3_targ address computation
Nishanth Menon [Fri, 11 Apr 2014 16:24:42 +0000 (11:24 -0500)]
bus: omap_l3_noc: un-obfuscate l3_targ address computation

just simplify derefencing that is equivalent.

Signed-off-by: Nishanth Menon <nm@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: Darren Etheridge <detheridge@ti.com>
Tested-by: Sekhar Nori <nsekhar@ti.com>
10 years agobus: omap_l3_noc: switch over to relaxed variants of readl/writel
Nishanth Menon [Fri, 11 Apr 2014 16:21:47 +0000 (11:21 -0500)]
bus: omap_l3_noc: switch over to relaxed variants of readl/writel

Currently we use __raw_readl and writel in this driver. Considering
there is no specific need for a memory barrier, replacing writel
with endian-neutral writel_relaxed and replacing __raw_readls with
the corresponding endian-neutral readl_relaxed allows us to have a
standard set of register operations for the driver.

While at it, simplify address computation using variables for
register.

Signed-off-by: Nishanth Menon <nm@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Felipe Balbi <balbi@ti.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: Darren Etheridge <detheridge@ti.com>
Tested-by: Sekhar Nori <nsekhar@ti.com>
10 years agobus: omap_l3_noc: populate l3->dev and use it
Nishanth Menon [Fri, 11 Apr 2014 17:04:01 +0000 (12:04 -0500)]
bus: omap_l3_noc: populate l3->dev and use it

l3->dev is not populated, so populate it and use it to print information
relevant to the device instead of using a generic pr_*.

Signed-off-by: Nishanth Menon <nm@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: Darren Etheridge <detheridge@ti.com>
Tested-by: Sekhar Nori <nsekhar@ti.com>
10 years agobus: omap_l3_noc: remove iclk from omap_l3 struct
Nishanth Menon [Fri, 11 Apr 2014 18:55:22 +0000 (13:55 -0500)]
bus: omap_l3_noc: remove iclk from omap_l3 struct

we do not use iclk directly anymore. And, even if we had to, we
should be using pm_runtime APIs to do the same to be completely SoC
independent.

Signed-off-by: Nishanth Menon <nm@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: Darren Etheridge <detheridge@ti.com>
Tested-by: Sekhar Nori <nsekhar@ti.com>
10 years agobus: omap_l3_noc: rename functions and data to omap_l3
Sricharan R [Fri, 11 Apr 2014 18:09:36 +0000 (13:09 -0500)]
bus: omap_l3_noc: rename functions and data to omap_l3

Since omap_l3_noc driver is now being used for OMAP5 and reusable with
DRA7 and AM437x, using omap4 specific naming is misleading.

Signed-off-by: Sricharan R <r.sricharan@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: Darren Etheridge <detheridge@ti.com>
Tested-by: Sekhar Nori <nsekhar@ti.com>
10 years agobus: omap_l3_noc: Fix copyright information
Nishanth Menon [Fri, 11 Apr 2014 18:15:43 +0000 (13:15 -0500)]
bus: omap_l3_noc: Fix copyright information

This is an embarrassing patch :(.

Texas Corporation does not make OMAP. Texas Instruments Inc does.

For that matter I dont seem to be able to find a Texas Corporation on
the internet either.

While at it, update coverage to the current year and update the template
to remove redundant information and use the standard boiler plate
licensing.

Signed-off-by: Nishanth Menon <nm@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: Darren Etheridge <detheridge@ti.com>
Tested-by: Sekhar Nori <nsekhar@ti.com>
10 years agodrivers: bus: omap_l3: Change pr_crit() to dev_err() when IRQ request fails
Peter Ujfalusi [Tue, 1 Apr 2014 13:23:50 +0000 (16:23 +0300)]
drivers: bus: omap_l3: Change pr_crit() to dev_err() when IRQ request fails

Use dev_err() which will going to print the driver's name as well and the
KERN_ERR level is sufficient in this case (we also print via dev_err when
there is an error with the mem resources)

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Reviewed-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Tested-by: Sekhar Nori <nsekhar@ti.com>
10 years agodrivers: bus: omap_l3: Remove the platform driver's remove function
Peter Ujfalusi [Tue, 1 Apr 2014 13:23:49 +0000 (16:23 +0300)]
drivers: bus: omap_l3: Remove the platform driver's remove function

It is NOP after the devm_* conversion.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Reviewed-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Tested-by: Sekhar Nori <nsekhar@ti.com>
10 years agodrivers: bus: omap_l3: Convert to use devm_request_irq()
Peter Ujfalusi [Tue, 1 Apr 2014 13:23:48 +0000 (16:23 +0300)]
drivers: bus: omap_l3: Convert to use devm_request_irq()

With this we can remove the free_irq() calls from probe and remove.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Reviewed-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Tested-by: Sekhar Nori <nsekhar@ti.com>
10 years agodrivers: bus: omap_l3: Convert to use devm_ioremap_resource()
Peter Ujfalusi [Tue, 1 Apr 2014 13:23:47 +0000 (16:23 +0300)]
drivers: bus: omap_l3: Convert to use devm_ioremap_resource()

We can then remove the iounmap() calls from probe and remove.
Since the driver requests the resources via index we can do the mem resource
request within a for loop.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Reviewed-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Tested-by: Sekhar Nori <nsekhar@ti.com>
10 years agodrivers: bus: omap_l3: Convert to use devm_kzalloc
Peter Ujfalusi [Tue, 1 Apr 2014 13:23:46 +0000 (16:23 +0300)]
drivers: bus: omap_l3: Convert to use devm_kzalloc

We can remove the kfree() calls from probe and remove.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Reviewed-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Tested-by: Sekhar Nori <nsekhar@ti.com>
10 years agoLinux 3.15-rc4 v3.15-rc4
Linus Torvalds [Mon, 5 May 2014 01:14:42 +0000 (18:14 -0700)]
Linux 3.15-rc4

10 years agoMerge tag 'locks-v3.15-3' of git://git.samba.org/jlayton/linux
Linus Torvalds [Sun, 4 May 2014 21:36:52 +0000 (14:36 -0700)]
Merge tag 'locks-v3.15-3' of git://git.samba.org/jlayton/linux

Pull file locking change from Jeff Layton:
 "Only an email address change to the MAINTAINERS file"

* tag 'locks-v3.15-3' of git://git.samba.org/jlayton/linux:
  MAINTAINERS: email address change for Jeff Layton

10 years agoMerge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Linus Torvalds [Sun, 4 May 2014 21:34:50 +0000 (14:34 -0700)]
Merge tag 'arm64-fixes' of git://git./linux/kernel/git/arm64/linux

Pull arm64 fixes from Catalin Marinas:
 "These are mostly arm64 fixes with an additional arm(64) platform fix
  for the initialisation of vexpress clocks (the latter only affecting
  arm64; the arch/arm64 code is SoC agnostic and does not rely on early
  SoC-specific calls)

   - vexpress platform clocks initialisation moved earlier following the
     arm64 move of of_clk_init() call in a previous commit
   - Default DMA ops changed to non-coherent to preserve compatibility
     with 32-bit ARM DT files.  The "dma-coherent" property can be used
     to explicitly mark a device coherent.  The Applied Micro DT file
     has been updated to avoid DMA cache maintenance for the X-Gene SATA
     controller (the only arm64 related driver with such assumption in
     -rc mainline)
   - Fixmap correction for earlyprintk
   - kern_addr_valid() fix for huge pages"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  vexpress: Initialise the sysregs before setting up the clocks
  arm64: Mark the Applied Micro X-Gene SATA controller as DMA coherent
  arm64: Use bus notifiers to set per-device coherent DMA ops
  arm64: Make default dma_ops to be noncoherent
  arm64: fixmap: fix missing sub-page offset for earlyprintk
  arm64: Fix for the arm64 kern_addr_valid() function

10 years agoMerge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Linus Torvalds [Sun, 4 May 2014 21:31:51 +0000 (14:31 -0700)]
Merge tag 'scsi-fixes' of git://git./linux/kernel/git/jejb/scsi

Pull SCSI fixes from James Bottomley:
 "This is two patches both fixing bugs in drivers (virtio-scsi and
  mpt2sas) causing an oops in certain circumstances"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  [SCSI] virtio-scsi: Skip setting affinity on uninitialized vq
  [SCSI] mpt2sas: Don't disable device twice at suspend.

10 years agovexpress: Initialise the sysregs before setting up the clocks
Catalin Marinas [Mon, 28 Apr 2014 16:08:37 +0000 (17:08 +0100)]
vexpress: Initialise the sysregs before setting up the clocks

Following arm64 commit bc3ee18a7a57 (arm64: init: Move of_clk_init to
time_init()), vexpress_osc_of_setup() is called via of_clk_init() long
before initcalls are issued. Initialising the vexpress oscillators
requires the vespress sysregs to be already initialised, so this patch
adds an explicit call to vexpress_sysreg_of_early_init() in vexpress
oscillator setup function.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Tested-by: Will Deacon <will.deacon@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Tested-by: Pawel Moll <pawel.moll@arm.com>
Acked-by: Pawel Moll <pawel.moll@arm.com>
Cc: Mike Turquette <mturquette@linaro.org>
10 years agoarm64: Mark the Applied Micro X-Gene SATA controller as DMA coherent
Catalin Marinas [Fri, 25 Apr 2014 15:39:49 +0000 (16:39 +0100)]
arm64: Mark the Applied Micro X-Gene SATA controller as DMA coherent

Since the default DMA ops for arm64 are non-coherent, mark the X-Gene
controller explicitly as dma-coherent to avoid additional cache
maintenance.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Loc Ho <lho@apm.com>
10 years agoarm64: Use bus notifiers to set per-device coherent DMA ops
Catalin Marinas [Fri, 25 Apr 2014 14:31:45 +0000 (15:31 +0100)]
arm64: Use bus notifiers to set per-device coherent DMA ops

Recently, the default DMA ops have been changed to non-coherent for
alignment with 32-bit ARM platforms (and DT files). This patch adds bus
notifiers to be able to set the coherent DMA ops (with no cache
maintenance) for devices explicitly marked as coherent via the
"dma-coherent" DT property.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
10 years agoarm64: Make default dma_ops to be noncoherent
Ritesh Harjani [Wed, 23 Apr 2014 05:29:46 +0000 (06:29 +0100)]
arm64: Make default dma_ops to be noncoherent

Currently arm64 dma_ops is by default made coherent which makes it
opposite in default policy from arm.

Make default dma_ops to be noncoherent (same as arm), as currently there
aren't any dma-capable drivers which assumes coherent ops

Signed-off-by: Ritesh Harjani <ritesh.harjani@gmail.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
10 years agoarm64: fixmap: fix missing sub-page offset for earlyprintk
Marc Zyngier [Mon, 28 Apr 2014 18:50:06 +0000 (19:50 +0100)]
arm64: fixmap: fix missing sub-page offset for earlyprintk

Commit d57c33c5daa4 (add generic fixmap.h) added (among other
similar things) set_fixmap_io to deal with early ioremap of devices.

More recently, commit bf4b558eba92 (arm64: add early_ioremap support)
converted the arm64 earlyprintk to use set_fixmap_io. A side effect of
this conversion is that my virtual machines have stopped booting when
I pass "earlyprintk=uart8250-8bit,0x3f8" to the guest kernel.

Turns out that the new earlyprintk code doesn't care at all about
sub-page offsets, and just assumes that the earlyprintk device will
be page-aligned. Obviously, that doesn't play well with the above example.

Further investigation shows that set_fixmap_io uses __set_fixmap instead
of __set_fixmap_offset. A fix is to introduce a set_fixmap_offset_io that
uses the latter, and to remove the superflous call to fix_to_virt
(which only returns the value that set_fixmap_io has already given us).

With this applied, my VMs are back in business. Tested on a Cortex-A57
platform with kvmtool as platform emulation.

Cc: Will Deacon <will.deacon@arm.com>
Acked-by: Mark Salter <msalter@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
10 years agoarm64: Fix for the arm64 kern_addr_valid() function
Dave Anderson [Tue, 15 Apr 2014 17:53:24 +0000 (18:53 +0100)]
arm64: Fix for the arm64 kern_addr_valid() function

Fix for the arm64 kern_addr_valid() function to recognize
virtual addresses in the kernel logical memory map.  The
function fails as written because it does not check whether
the addresses in that region are mapped at the pmd level to
2MB or 512MB pages, continues the page table walk to the
pte level, and issues a garbage value to pfn_valid().

Tested on 4K-page and 64K-page kernels.

Signed-off-by: Dave Anderson <anderson@redhat.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
10 years agoMerge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 3 May 2014 15:32:48 +0000 (08:32 -0700)]
Merge branch 'irq-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull irq fixes from Thomas Gleixner:
 "This udpate delivers:

   - A fix for dynamic interrupt allocation on x86 which is required to
     exclude the GSI interrupts from the dynamic allocatable range.

     This was detected with the newfangled tablet SoCs which have GPIOs
     and therefor allocate a range of interrupts.  The MSI allocations
     already excluded the GSI range, so we never noticed before.

   - The last missing set_irq_affinity() repair, which was delayed due
     to testing issues

   - A few bug fixes for the armada SoC interrupt controller

   - A memory allocation fix for the TI crossbar interrupt controller

   - A trivial kernel-doc warning fix"

* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  irqchip: irq-crossbar: Not allocating enough memory
  irqchip: armanda: Sanitize set_irq_affinity()
  genirq: x86: Ensure that dynamic irq allocation does not conflict
  linux/interrupt.h: fix new kernel-doc warnings
  irqchip: armada-370-xp: Fix releasing of MSIs
  irqchip: armada-370-xp: implement the ->check_device() msi_chip operation
  irqchip: armada-370-xp: fix invalid cast of signed value into unsigned variable

10 years agoMerge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 3 May 2014 15:31:45 +0000 (08:31 -0700)]
Merge branch 'timers-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull timer fixes from Thomas Gleixner:
 "This update brings along:

   - Two fixes for long standing bugs in the hrtimer code, one which
     prevents remote enqueuing and the other preventing arbitrary delays
     after a interrupt hang was detected

   - A fix in the timer wheel which prevents math overflow

   - A fix for a long standing issue with the architected ARM timer
     related to the C3STOP mechanism.

   - A trivial compile fix for nspire SoC clocksource"

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  timer: Prevent overflow in apply_slack
  hrtimer: Prevent remote enqueue of leftmost timers
  hrtimer: Prevent all reprogramming if hang detected
  clocksource: nspire: Fix compiler warning
  clocksource: arch_arm_timer: Fix age-old arch timer C3STOP detection issue

10 years agoMerge tag 'trace-fixes-v3.15-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sat, 3 May 2014 15:30:44 +0000 (08:30 -0700)]
Merge tag 'trace-fixes-v3.15-rc3' of git://git./linux/kernel/git/rostedt/linux-trace

Pull tracing fix from Steven Rostedt:
 "This is a small fix where the trigger code used the wrong
  rcu_dereference().  It required rcu_dereference_sched() instead of the
  normal rcu_dereference().  It produces a nasty RCU lockdep splat due
  to the incorrect rcu notation"

Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
* tag 'trace-fixes-v3.15-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  tracing: Use rcu_dereference_sched() for trace event triggers

10 years agotracing: Use rcu_dereference_sched() for trace event triggers
Steven Rostedt (Red Hat) [Fri, 2 May 2014 17:30:04 +0000 (13:30 -0400)]
tracing: Use rcu_dereference_sched() for trace event triggers

As trace event triggers are now part of the mainline kernel, I added
my trace event trigger tests to my test suite I run on all my kernels.
Now these tests get run under different config options, and one of
those options is CONFIG_PROVE_RCU, which checks under lockdep that
the rcu locking primitives are being used correctly. This triggered
the following splat:

===============================
[ INFO: suspicious RCU usage. ]
3.15.0-rc2-test+ #11 Not tainted
-------------------------------
kernel/trace/trace_events_trigger.c:80 suspicious rcu_dereference_check() usage!

other info that might help us debug this:

rcu_scheduler_active = 1, debug_locks = 0
4 locks held by swapper/1/0:
 #0:  ((&(&j_cdbs->work)->timer)){..-...}, at: [<ffffffff8104d2cc>] call_timer_fn+0x5/0x1be
 #1:  (&(&pool->lock)->rlock){-.-...}, at: [<ffffffff81059856>] __queue_work+0x140/0x283
 #2:  (&p->pi_lock){-.-.-.}, at: [<ffffffff8106e961>] try_to_wake_up+0x2e/0x1e8
 #3:  (&rq->lock){-.-.-.}, at: [<ffffffff8106ead3>] try_to_wake_up+0x1a0/0x1e8

stack backtrace:
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 3.15.0-rc2-test+ #11
Hardware name:                  /DG965MQ, BIOS MQ96510J.86A.0372.2006.0605.1717 06/05/2006
 0000000000000001 ffff88007e083b98 ffffffff819f53a5 0000000000000006
 ffff88007b0942c0 ffff88007e083bc8 ffffffff81081307 ffff88007ad96d20
 0000000000000000 ffff88007af2d840 ffff88007b2e701c ffff88007e083c18
Call Trace:
 <IRQ>  [<ffffffff819f53a5>] dump_stack+0x4f/0x7c
 [<ffffffff81081307>] lockdep_rcu_suspicious+0x107/0x110
 [<ffffffff810ee51c>] event_triggers_call+0x99/0x108
 [<ffffffff810e8174>] ftrace_event_buffer_commit+0x42/0xa4
 [<ffffffff8106aadc>] ftrace_raw_event_sched_wakeup_template+0x71/0x7c
 [<ffffffff8106bcbf>] ttwu_do_wakeup+0x7f/0xff
 [<ffffffff8106bd9b>] ttwu_do_activate.constprop.126+0x5c/0x61
 [<ffffffff8106eadf>] try_to_wake_up+0x1ac/0x1e8
 [<ffffffff8106eb77>] wake_up_process+0x36/0x3b
 [<ffffffff810575cc>] wake_up_worker+0x24/0x26
 [<ffffffff810578bc>] insert_work+0x5c/0x65
 [<ffffffff81059982>] __queue_work+0x26c/0x283
 [<ffffffff81059999>] ? __queue_work+0x283/0x283
 [<ffffffff810599b7>] delayed_work_timer_fn+0x1e/0x20
 [<ffffffff8104d3a6>] call_timer_fn+0xdf/0x1be^M
 [<ffffffff8104d2cc>] ? call_timer_fn+0x5/0x1be
 [<ffffffff81059999>] ? __queue_work+0x283/0x283
 [<ffffffff8104d823>] run_timer_softirq+0x1a4/0x22f^M
 [<ffffffff8104696d>] __do_softirq+0x17b/0x31b^M
 [<ffffffff81046d03>] irq_exit+0x42/0x97
 [<ffffffff81a08db6>] smp_apic_timer_interrupt+0x37/0x44
 [<ffffffff81a07a2f>] apic_timer_interrupt+0x6f/0x80
 <EOI>  [<ffffffff8100a5d8>] ? default_idle+0x21/0x32
 [<ffffffff8100a5d6>] ? default_idle+0x1f/0x32
 [<ffffffff8100ac10>] arch_cpu_idle+0xf/0x11
 [<ffffffff8107b3a4>] cpu_startup_entry+0x1a3/0x213
 [<ffffffff8102a23c>] start_secondary+0x212/0x219

The cause is that the triggers are protected by rcu_read_lock_sched() but
the data is dereferenced with rcu_dereference() which expects it to
be protected with rcu_read_lock(). The proper reference should be
rcu_dereference_sched().

Cc: Tom Zanussi <tom.zanussi@linux.intel.com>
Cc: stable@vger.kernel.org # 3.14+
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
10 years agoMerge tag 'pm+acpi-3.15-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael...
Linus Torvalds [Sat, 3 May 2014 01:16:31 +0000 (18:16 -0700)]
Merge tag 'pm+acpi-3.15-rc4' of git://git./linux/kernel/git/rafael/linux-pm

Pull ACPI and power management fixes from Rafael Wysocki:
 "A bunch of regression fixes this time.  They fix two regressions in
  the PNP subsystem, one in the ACPI processor driver and one in the
  ACPI EC driver, four cpufreq driver regressions and an unrelated bug
  in one of the drivers.  The regressions are recent or introduced in
  3.14.

  Specifics:

   - There are two bugs in the ACPI PNP core that cause errors to be
     returned if optional ACPI methods are not present.  After an ACPI
     core change made in 3.14 one of those errors leads to serial port
     suspend failures on some systems.  Fix from Rafael J Wysocki.

   - A recently added PNP quirk related to Intel chipsets intorduced a
     build error in unusual configurations (PNP without PCI).  Fix from
     Bjorn Helgaas.

   - An ACPI EC workaround related to system suspend on Samsung machines
     added in 3.14 introduced a race causing some valid EC events to be
     discarded.  Fix from Kieran Clancy.

   - The acpi-cpufreq driver fails to load on some systems after a 3.14
     commit related to APIC ID parsing that overlooked one corner case.
     Fix from Lan Tianyu.

   - Fix for a recently introduced build problem in the ppc-corenet
     cpufreq driver from Tim Gardner.

   - A recent cpufreq core change to ensure serialization of frequency
     transitions for drivers with a ->target_index() callback overlooked
     the fact that some of those drivers had been doing operations
     introduced by it into the core already by themselves.  That
     resulted in a mess in which the core and the drivers try to do the
     same thing and block each other which leads to deadlocks.  Fixes
     for the powernow-k7, powernow-k6, and longhaul cpufreq drivers from
     Srivatsa S Bhat.

   - Fix for a computational error in the powernow-k6 cpufreq driver
     from Srivatsa S Bhat"

* tag 'pm+acpi-3.15-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI / processor: Fix failure of loading acpi-cpufreq driver
  PNP / ACPI: Do not return errors if _DIS or _SRS are not present
  PNP: Fix compile error in quirks.c
  ACPI / EC: Process rather than discard events in acpi_ec_clear
  cpufreq: ppc-corenet-cpufreq: Fix __udivdi3 modpost error
  cpufreq: powernow-k7: Fix double invocation of cpufreq_freq_transition_begin/end
  cpufreq: powernow-k6: Fix double invocation of cpufreq_freq_transition_begin/end
  cpufreq: powernow-k6: Fix incorrect comparison with max_multipler
  cpufreq: longhaul: Fix double invocation of cpufreq_freq_transition_begin/end

10 years agoMerge tag 'dt-for-linus' of git://git.secretlab.ca/git/linux
Linus Torvalds [Sat, 3 May 2014 01:12:54 +0000 (18:12 -0700)]
Merge tag 'dt-for-linus' of git://git.secretlab.ca/git/linux

Pull driver core deferred probe fix from Grant Likely:
 "Drivercore race condition fix (exposed by devicetree)

  This branch fixes a bug where a device can get stuck in the deferred
  list even though all its dependencies are met.  The bug has existed
  for a long time, but new platform conversions to device tree have
  exposed it.  This patch is needed to get those platforms working.

  This was the pending bug fix I mentioned in my previous pull request.
  Normally this would go through Greg's tree seeing that it is a
  drivercore change, but devicetree exposes the problem.  I've discussed
  with Greg and he okayed me asking you to pull directly"

* tag 'dt-for-linus' of git://git.secretlab.ca/git/linux:
  drivercore: deferral race condition fix

10 years agoMerge branches 'acpi-ec' and 'acpi-processor'
Rafael J. Wysocki [Fri, 2 May 2014 22:20:31 +0000 (00:20 +0200)]
Merge branches 'acpi-ec' and 'acpi-processor'

* acpi-ec:
  ACPI / EC: Process rather than discard events in acpi_ec_clear

* acpi-processor:
  ACPI / processor: Fix failure of loading acpi-cpufreq driver

10 years agoMerge branch 'pnp'
Rafael J. Wysocki [Fri, 2 May 2014 22:20:18 +0000 (00:20 +0200)]
Merge branch 'pnp'

* pnp:
  PNP / ACPI: Do not return errors if _DIS or _SRS are not present
  PNP: Fix compile error in quirks.c

10 years agoMerge branch 'pm-cpufreq'
Rafael J. Wysocki [Fri, 2 May 2014 22:19:56 +0000 (00:19 +0200)]
Merge branch 'pm-cpufreq'

* pm-cpufreq:
  cpufreq: ppc-corenet-cpufreq: Fix __udivdi3 modpost error
  cpufreq: powernow-k7: Fix double invocation of cpufreq_freq_transition_begin/end
  cpufreq: powernow-k6: Fix double invocation of cpufreq_freq_transition_begin/end
  cpufreq: powernow-k6: Fix incorrect comparison with max_multipler
  cpufreq: longhaul: Fix double invocation of cpufreq_freq_transition_begin/end

10 years agoMerge tag 'dm-3.15-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device...
Linus Torvalds [Fri, 2 May 2014 21:14:02 +0000 (14:14 -0700)]
Merge tag 'dm-3.15-fixes' of git://git./linux/kernel/git/device-mapper/linux-dm

Pull device mapper fixes from Mike Snitzer:
 "A few dm-thinp fixes for changes merged in 3.15-rc1.

  A dm-verity fix for an immutable biovec regression that affects 3.14+.

  A dm-cache fix to properly quiesce when using writethrough mode (3.14+)"

* tag 'dm-3.15-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
  dm cache: fix writethrough mode quiescing in cache_map
  dm thin: use INIT_WORK_ONSTACK in noflush_work to avoid ODEBUG warning
  dm verity: fix biovecs hash calculation regression
  dm thin: fix rcu_read_lock being held in code that can sleep
  dm thin: irqsave must always be used with the pool->lock spinlock

10 years agoMerge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 2 May 2014 21:04:52 +0000 (14:04 -0700)]
Merge branch 'x86-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull x86 fixes from Peter Anvin:
 "Two very small changes: one fix for the vSMP Foundation platform, and
  one to help LLVM not choke on options it doesn't understand (although
  it probably should)"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/vsmp: Fix irq routing
  x86: LLVMLinux: Wrap -mno-80387 with cc-option

10 years agoMerge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Linus Torvalds [Fri, 2 May 2014 16:26:09 +0000 (09:26 -0700)]
Merge tag 'for-linus' of git://git./virt/kvm/kvm

Pull KVM fixes from Paolo Bonzini:
 - Fix for a Haswell regression in nested virtualization, introduced
   during the merge window.
 - A fix from Oleg to async page faults.
 - A bunch of small ARM changes.
 - A trivial patch to use the new MSI-X API introduced during the merge
   window.

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: ARM: vgic: Fix the overlap check action about setting the GICD & GICC base address.
  KVM: arm/arm64: vgic: fix GICD_ICFGR register accesses
  KVM: async_pf: mm->mm_users can not pin apf->mm
  KVM: ARM: vgic: Fix sgi dispatch problem
  MAINTAINERS: co-maintainance of KVM/{arm,arm64}
  arm: KVM: fix possible misalignment of PGDs and bounce page
  KVM: x86: Check for host supported fields in shadow vmcs
  kvm: Use pci_enable_msix_exact() instead of pci_enable_msix()
  ARM: KVM: disable KVM in Kconfig on big-endian systems

10 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Linus Torvalds [Fri, 2 May 2014 16:25:32 +0000 (09:25 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/s390/linux

Pull s390 fixes from Martin Schwidefsky:
 "Two bug fixes, one to fix a potential information leak in the BPF jit
  and common-io-layer fix for old firmware levels"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/bpf,jit: initialize A register if 1st insn is BPF_S_LDX_B_MSH
  s390/chsc: fix SEI usage on old FW levels

10 years agoclocksource: exynos_mct: register sched_clock callback
Vincent Guittot [Fri, 2 May 2014 13:27:01 +0000 (22:27 +0900)]
clocksource: exynos_mct: register sched_clock callback

Use the clocksource mct-frc for sched_clock

Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
10 years agoMerge tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland...
Linus Torvalds [Fri, 2 May 2014 00:52:42 +0000 (17:52 -0700)]
Merge tag 'rdma-for-linus' of git://git./linux/kernel/git/roland/infiniband

Pull infiniband/rdma fixes from Roland Dreier:
 "cxgb4 hardware driver fixes"

* tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband:
  RDMA/cxgb4: Update Kconfig to include Chelsio T5 adapter
  RDMA/cxgb4: Only allow kernel db ringing for T4 devs
  RDMA/cxgb4: Force T5 connections to use TAHOE congestion control
  RDMA/cxgb4: Fix endpoint mutex deadlocks

10 years agoMerge branch 'parisc-3.15-3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller...
Linus Torvalds [Thu, 1 May 2014 22:54:44 +0000 (15:54 -0700)]
Merge branch 'parisc-3.15-3' of git://git./linux/kernel/git/deller/parisc-linux

Pull parisc fixes from Helge Deller:
 "Drop the architecture-specifc value for_STK_LIM_MAX to fix stack
  related problems with GNU make"

* 'parisc-3.15-3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: Use generic uapi/asm/resource.h file
  parisc: remove _STK_LIM_MAX override

10 years agodm cache: fix writethrough mode quiescing in cache_map
Mike Snitzer [Thu, 1 May 2014 20:14:24 +0000 (16:14 -0400)]
dm cache: fix writethrough mode quiescing in cache_map

Commit 2ee57d58735 ("dm cache: add passthrough mode") inadvertently
removed the deferred set reference that was taken in cache_map()'s
writethrough mode support.  Restore taking this reference.

This issue was found with code inspection.

Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Acked-by: Joe Thornber <ejt@redhat.com>
Cc: stable@vger.kernel.org # 3.13+
10 years agoMerge tag 'pinctrl-v3.15-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw...
Linus Torvalds [Thu, 1 May 2014 18:28:03 +0000 (11:28 -0700)]
Merge tag 'pinctrl-v3.15-3' of git://git./linux/kernel/git/linusw/linux-pinctrl

Pull pin control fixes from Linus Walleij:
 "Here is a small set of pin control fixes for the v3.15 series.  All
  are individual driver fixes and quite self-contained.  One of them
  tagged for stable.

   - Signedness bug in the TB10x

   - GPIO inversion fix for the AS3722

   - Clear pending pin interrups enabled in the bootloader in the
     pinctrl-single driver

   - Minor pin definition fixes for the PFC/Renesas driver"

* tag 'pinctrl-v3.15-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl:
  sh-pfc: r8a7791: Fix definition of MOD_SEL3
  sh-pfc: r8a7790: Fix definition of IPSR5
  pinctrl: single: Clear pin interrupts enabled by bootloader
  pinctrl: as3722: fix handling of GPIO invert bit
  pinctrl/TB10x: Fix signedness bug

10 years agoMerge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty...
Linus Torvalds [Thu, 1 May 2014 17:35:01 +0000 (10:35 -0700)]
Merge tag 'fixes-for-linus' of git://git./linux/kernel/git/rusty/linux

Pull module fixes from Rusty Russell:
 "Fixed one missing place for the new taint flag, and remove a warning
  giving only false positives (now we finally figured out why)"

* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux:
  module: remove warning about waiting module removal.
  Fix: tracing: use 'E' instead of 'X' for unsigned module taint flag

10 years agoparisc: Use generic uapi/asm/resource.h file
Helge Deller [Tue, 29 Apr 2014 14:13:22 +0000 (16:13 +0200)]
parisc: Use generic uapi/asm/resource.h file

Signed-off-by: Helge Deller <deller@gmx.de>
10 years agoparisc: remove _STK_LIM_MAX override
John David Anglin [Sun, 27 Apr 2014 20:20:47 +0000 (16:20 -0400)]
parisc: remove _STK_LIM_MAX override

There are only a couple of architectures that override _STK_LIM_MAX to
a non-infinity value. This changes the stack allocation semantics in
subtle ways. For example, GNU make changes its stack allocation to the
hard maximum defined by _STK_LIM_MAX. As a results, threads executed
by processes running under make are allocated a stack size of
_STK_LIM_MAX rather than a sensible default value. This causes various
thread stress tests to fail when they can't muster more than about 50
threads.

The attached change implements the default behavior used by the
majority of architectures.

Signed-off-by: John David Anglin <dave.anglin@bell.net>
Reviewed-by: Carlos O'Donell <carlos@systemhalted.org>
Cc: stable@vger.kernel.org # 3.14
Signed-off-by: Helge Deller <deller@gmx.de>
10 years agoHexagon: Delete stale barrier.h
Vineet Gupta [Fri, 18 Apr 2014 08:08:35 +0000 (13:38 +0530)]
Hexagon: Delete stale barrier.h

Commit 93ea02bb8435 ("arch: Clean up asm/barrier.h implementations")
wired generic barrier.h for hexagon, but failed to delete the existing
file.

Cc: Richard Kuo <rkuo@codeaurora.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Compile-tested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
10 years agoMerge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Thu, 1 May 2014 16:50:58 +0000 (09:50 -0700)]
Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull perf fixes from Ingo Molnar:
 "Mostly tooling fixes, plus an Intel RAPL PMU driver fix"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf tests x86: Fix stack map lookup in dwarf unwind test
  perf x86: Fix perf to use non-executable stack, again
  perf tools: Remove extra '/' character in events file path
  perf machine: Search for modules in %s/lib/modules/%s
  perf tests: Add static build make test
  perf tools: Fix bfd dependency libraries detection
  perf tools: Use LDFLAGS instead of ALL_LDFLAGS
  perf/x86: Fix RAPL rdmsrl_safe() usage
  tools lib traceevent: Fix memory leak in pretty_print()
  tools lib traceevent: Fix backward compatibility macros for pevent filter enums
  perf tools: Disable libdw unwind for all but x86 arch
  perf tests x86: Fix memory leak in sample_ustack()

10 years agoMerge tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck...
Linus Torvalds [Thu, 1 May 2014 15:59:49 +0000 (08:59 -0700)]
Merge tag 'hwmon-for-linus' of git://git./linux/kernel/git/groeck/linux-staging

Pull hwmon fix from Guenter Roeck:
 "Fix Tjmax detection in coretemp driver"

* tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
  Revert "hwmon: (coretemp) Refine TjMax detection"

10 years agoword-at-a-time: simplify big-endian zero_bytemask macro
H. Peter Anvin [Wed, 30 Apr 2014 21:22:19 +0000 (14:22 -0700)]
word-at-a-time: simplify big-endian zero_bytemask macro

This is simpler and cleaner.  Depending on architecture, a smart
compiler may or may not generate the same code.

Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
10 years agoMerge git://git.kvack.org/~bcrl/aio-fixes
Linus Torvalds [Thu, 1 May 2014 15:54:03 +0000 (08:54 -0700)]
Merge git://git.kvack.org/~bcrl/aio-fixes

Pull aio fixes from Ben LaHaise:
 "The first change from Anatol fixes a regression where io_destroy() no
  longer waits for outstanding aios to complete.  The second corrects a
  memory leak in an error path for vectored aio operations.

  Both of these bug fixes should be queued up for stable as well"

* git://git.kvack.org/~bcrl/aio-fixes:
  aio: fix potential leak in aio_run_iocb().
  aio: block io_destroy() until all context requests are completed

10 years agoaio: fix potential leak in aio_run_iocb().
Leon Yu [Thu, 1 May 2014 03:31:28 +0000 (03:31 +0000)]
aio: fix potential leak in aio_run_iocb().

iovec should be reclaimed whenever caller of rw_copy_check_uvector() returns,
but it doesn't hold when failure happens right after aio_setup_vectored_rw().

Fix that in a such way to avoid hairy goto.

Signed-off-by: Leon Yu <chianglungyu@gmail.com>
Signed-off-by: Benjamin LaHaise <bcrl@kvack.org>
Cc: stable@vger.kernel.org
10 years agoRevert "hwmon: (coretemp) Refine TjMax detection"
Guenter Roeck [Wed, 30 Apr 2014 21:08:14 +0000 (14:08 -0700)]
Revert "hwmon: (coretemp) Refine TjMax detection"

This reverts commit 9fb6c9c73b11bef65ba80a362547fd116c1e1c9d.

Tjmax on some Intel CPUs is below 85 degrees C. One known example is
L5630 with Tjmax of 71 degrees C. There are other Xeon processors with
Tjmax of 70 or 80 degrees C. Also, the Intel IA32 System Programming
document states that the temperature target is in bits 23:16 of MSR 0x1a2
(MSR_TEMPERATURE_TARGET), which is 8 bits, not 7.

So even if turbostat uses similar checks to validate Tjmax, there is no
evidence that the checks are actually required. On the contrary, the
checks are known to cause problems and therefore need to be removed.

This fixes https://bugzilla.kernel.org/show_bug.cgi?id=75071.

Fixes: 9fb6c9c hwmon: (coretemp) Refine TjMax detection
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Cc: stable@vger.kernel.org # 3.14+
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
10 years agoMerge tag 'perf-urgent-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git...
Ingo Molnar [Thu, 1 May 2014 06:22:08 +0000 (08:22 +0200)]
Merge tag 'perf-urgent-for-mingo' of git://git./linux/kernel/git/jolsa/perf into perf/urgent

Pull perf/urgent fixes from Jiri Olsa:

  * Fix perf to use non-executable stack, again (Mathias Krause)

  * Remove extra '/' character in events file path (Xia Kaixu)

  * Search for modules in %s/lib/modules/%s (Richard Yao)

  * Build related fixies plus static build test (Jiri Olsa)

  * Fix stack map lookup in dwarf unwind test (Jiri Olsa)

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
10 years agoACPI / processor: Fix failure of loading acpi-cpufreq driver
Lan Tianyu [Wed, 30 Apr 2014 07:46:33 +0000 (15:46 +0800)]
ACPI / processor: Fix failure of loading acpi-cpufreq driver

According commit d640113fe (ACPI: processor: fix acpi_get_cpuid for UP
processor),  BIOS may not provide _MAT or MADT tables and acpi_get_apicid()
always returns -1. For these cases, original code will pass apic_id with
vaule of -1 to acpi_map_cpuid() and it will check the acpi_id. If acpi_id
is equal to zero, ignores apic_id and return zero for CPU0.

Commit b981513 (ACPI / scan: bail out early if failed to parse APIC
ID for CPU) changed the behavior. Return ENODEV when find apic_id is
less than zero after calling acpi_get_apicid(). This causes acpi-cpufreq
driver fails to be loaded on some machines. This patch is to fix it.

Fixes: b981513f806d (ACPI / scan: bail out early if failed to parse APIC ID for CPU)
References: https://bugzilla.kernel.org/show_bug.cgi?id=73781
Cc: 3.14+ <stable@vger.kernel.org> # 3.14+
Reported-and-tested-by: KATO Hiroshi <katoh@mikage.ne.jp>
Reported-and-tested-by: Stuart Foster <smf.linux@ntlworld.com>
Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
10 years agoPNP / ACPI: Do not return errors if _DIS or _SRS are not present
Rafael J. Wysocki [Wed, 30 Apr 2014 20:36:33 +0000 (22:36 +0200)]
PNP / ACPI: Do not return errors if _DIS or _SRS are not present

The ACPI PNP subsystem returns errors from pnpacpi_set_resources()
and pnpacpi_disable_resources() if the _SRS or _DIS methods are not
present, respectively, but it should not do that, because those
methods are optional.  For this reason, modify pnpacpi_set_resources()
and pnpacpi_disable_resources(), respectively, to ignore missing _SRS
or _DIS.

This problem has been uncovered by commit 202317a573b2 (ACPI / scan:
Add acpi_device objects for all device nodes in the namespace) and
manifested itself by causing serial port suspend to fail on some
systems.

Fixes: 202317a573b2 (ACPI / scan: Add acpi_device objects for all device nodes in the namespace)
References: https://bugzilla.kernel.org/show_bug.cgi?id=74371
Reported-by: wxg4net <wxg4net@gmail.com>
Reported-and-tested-by: <nonproffessional@gmail.com>
Cc: 3.14+ <stable@vger.kernel.org> # 3.14+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
10 years agoMerge tag 'kvm-arm-for-3.15-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git...
Paolo Bonzini [Wed, 30 Apr 2014 19:25:09 +0000 (21:25 +0200)]
Merge tag 'kvm-arm-for-3.15-rc4' of git://git./linux/kernel/git/kvmarm/kvmarm into kvm-master

First round of KVM/ARM Fixes for 3.15

Includes vgic fixes, a possible kernel corruption bug due to
misalignment of pages and disabling of KVM in KConfig on big-endian
systems, because the last one breaks the build.

10 years agoMAINTAINERS: email address change for Jeff Layton
Jeff Layton [Wed, 30 Apr 2014 17:28:17 +0000 (13:28 -0400)]
MAINTAINERS: email address change for Jeff Layton

jlayton@redhat.com -> jlayton@poochiereds.net

Signed-off-by: Jeff Layton <jlayton@poochiereds.net>
10 years agoARC: !PREEMPT: Ensure Return to kernel mode is IRQ safe
Vineet Gupta [Wed, 30 Apr 2014 09:56:45 +0000 (15:26 +0530)]
ARC: !PREEMPT: Ensure Return to kernel mode is IRQ safe

There was a very small race window where resume to kernel mode from a
Exception Path (or pure kernel mode which is true for most of ARC
exceptions anyways), was not disabling interrupts in restore_regs,
clobbering the exception regs

Anton found the culprit call flow (after many sleepless nights)

| 1. we got a Trap from user land
| 2. started to service it.
| 3. While doing some stuff on user-land memory (I think it is padzero()),
|     we got a DataTlbMiss
| 4. On return from it we are taking "resume_kernel_mode" path
| 5. NEED_RESHED is not set, so we go to "return from exception" path in
|     restore regs.
| 6. there seems to be IRQ happening

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Cc: <stable@vger.kernel.org> #3.10, 3.12, 3.13, 3.14
Cc: Anton Kolesov <Anton.Kolesov@synopsys.com>
Cc: Francois Bedard <Francois.Bedard@synopsys.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
10 years agoMerge tag 'sound-3.15-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai...
Linus Torvalds [Wed, 30 Apr 2014 15:15:59 +0000 (08:15 -0700)]
Merge tag 'sound-3.15-rc4' of git://git./linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "A few collections of small eggs that have been gathered during the
  Easter holidays.  Mostly small ASoC fixes, with a HD-audio quirk and a
  workaround for Nvidia controller"

* tag 'sound-3.15-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: hda - Suppress CORBRP clear on Nvidia controller chips
  ALSA: hda - add headset mic detect quirk for a Dell laptop
  ASoC: jz4740: Remove Makefile entry for removed file
  ASoC: Intel: Fix audio crash due to negative address offset
  ASoC: dapm: Fix widget double free with auto-disable DAPM kcontrol
  ASoC: Intel: Fix incorrect sizeof() in sst_hsw_stream_get_volume()
  ASoC: Intel: some incorrect sizeof() usages
  ASoC: cs42l73: Convert to use devm_gpio_request_one
  ASoC: cs42l52: Convert to use devm_gpio_request_one
  ASoC: tlv320aic31xx: document that the regulators are mandatory
  ASoC: fsl_spdif: Fix wrong OFFSET of STC_SYSCLK_DIV
  ASoC: alc5623: Fix regmap endianness
  ASoC: tlv320aic3x: fix shared reset pin for DT
  ASoC: rsnd: fix clock prepare/unprepare

10 years agoperf tests x86: Fix stack map lookup in dwarf unwind test
Jiri Olsa [Wed, 30 Apr 2014 14:39:44 +0000 (16:39 +0200)]
perf tests x86: Fix stack map lookup in dwarf unwind test

Previous commit 'perf x86: Fix perf to use non-executable stack, again'
moved stack map into MAP__VARIABLE map type again. Fixing the dwarf
unwind test stack map lookup appropriately.

Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Jean Pihet <jean.pihet@linaro.org>
Link: http://lkml.kernel.org/n/tip-ttzyhbe4zls24z7ednkmhvxl@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
10 years agoperf x86: Fix perf to use non-executable stack, again
Mathias Krause [Sun, 27 Apr 2014 16:51:05 +0000 (18:51 +0200)]
perf x86: Fix perf to use non-executable stack, again

arch/x86/tests/regs_load.S is missing the linker note about the stack
requirements, therefore making the linker fall back to an executable
stack. As this object gets linked against the final perf binary, it'll
needlessly end up with an executable stack. Fix this by adding the
appropriate linker note.

Also add a global linker flag to prevent future regressions, as
suggested by Jiri. This way perf won't get an executable stack even if
we fail to add the .GNU-stack linker note to future assembler files.
Though, doing so might create regressions the other way around, when
(statically) linking against libraries needing an executable stack.
But, apparently, regressing in that direction is wanted as it is an
indicator of poor code quality -- or just missing linker notes.

Fixes: 3c8b06f981 ("perf tests x86: Introduce perf_regs_load function")
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1398617466-22749-1-git-send-email-minipli@googlemail.com
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
10 years agoperf tools: Remove extra '/' character in events file path
Xia Kaixu [Sat, 26 Apr 2014 07:55:12 +0000 (15:55 +0800)]
perf tools: Remove extra '/' character in events file path

The array debugfs_known_mountpoints[] will cause extra '/'
character output.
Remove it.

pre:
$ perf probe -l
/sys/kernel/debug//tracing/uprobe_events file does not exist -
please rebuild kernel with CONFIG_UPROBE_EVENTS.

post:
$ perf probe -l
/sys/kernel/debug/tracing/uprobe_events file does not exist -
please rebuild kernel with CONFIG_UPROBE_EVENTS.

Signed-off-by: Xia Kaixu <xiakaixu@huawei.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/535B6660.2060001@huawei.com
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
10 years agoperf machine: Search for modules in %s/lib/modules/%s
Richard Yao [Sat, 26 Apr 2014 17:17:55 +0000 (13:17 -0400)]
perf machine: Search for modules in %s/lib/modules/%s

Modules installed outside of the kernel's build system should go into
"%s/lib/modules/%s/extra", but at present, perf will only look at them
when they are in "%s/lib/modules/%s/kernel". Lets encourage good
citizenship by relaxing this requirement to "%s/lib/modules/%s". This
way open source modules that are out-of-tree have no incentive to start
populating a directory reserved for in-kernel modules and I can stop
hex-editing my system's perf binary when profiling OSS out-of-tree
modules.

Feedback from Namhyung Kim correctly revealed that the hex-edits that I
had been doing meant that perf was also traversing the build and source
symlinks in %s/lib/modules/%s. That is undesireable, so we explicitly
exclude them from traversal with a minor tweak to the traversal routine.

Signed-off-by: Richard Yao <ryao@gentoo.org>
Acked-by: Namhyung kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/1398532675-13684-1-git-send-email-ryao@gentoo.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
10 years agoperf tests: Add static build make test
Jiri Olsa [Tue, 29 Apr 2014 07:53:40 +0000 (09:53 +0200)]
perf tests: Add static build make test

Adding test for building static perf build into the automated
suite. Also available via following commands:

  $ make -f tests/make make_static
  - make_static: cd . && make -f Makefile DESTDIR=/tmp/tmp.7u5MlB4njo LDFLAGS=-static
  $ make -f tests/make make_static_O
  - make_static_O: cd . && make -f Makefile O=/tmp/tmp.Ay6r3wEmtX DESTDIR=/tmp/tmp.vK0KQwO0Vi LDFLAGS=-static

Acked-by: David Ahern <dsahern@gmail.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1398760413-7574-1-git-send-email-jolsa@kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
10 years agoperf tools: Fix bfd dependency libraries detection
Jiri Olsa [Wed, 23 Apr 2014 14:53:25 +0000 (16:53 +0200)]
perf tools: Fix bfd dependency libraries detection

There's false assumption in the library detection code
assuming -liberty and -lz are always present once bfd
is detected. The fails on Ubuntu (14.04) as reported
by Ingo.

Forcing the bdf dependency libraries detection any
time bfd library is detected.

Reported-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Ingo Molnar <mingo@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1398676935-6615-1-git-send-email-jolsa@kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
10 years agoperf tools: Use LDFLAGS instead of ALL_LDFLAGS
Jiri Olsa [Sun, 27 Apr 2014 09:12:21 +0000 (11:12 +0200)]
perf tools: Use LDFLAGS instead of ALL_LDFLAGS

We no longer use ALL_LDFLAGS, Replacing with LDFLAGS.

Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1398675770-3109-1-git-send-email-jolsa@kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
10 years agotimer: Prevent overflow in apply_slack
Jiri Bohac [Fri, 18 Apr 2014 15:23:11 +0000 (17:23 +0200)]
timer: Prevent overflow in apply_slack

On architectures with sizeof(int) < sizeof (long), the
computation of mask inside apply_slack() can be undefined if the
computed bit is > 32.

E.g. with: expires = 0xffffe6f5 and slack = 25, we get:

expires_limit = 0x20000000e
bit = 33
mask = (1 << 33) - 1  /* undefined */

On x86, mask becomes 1 and and the slack is not applied properly.
On s390, mask is -1, expires is set to 0 and the timer fires immediately.

Use 1UL << bit to solve that issue.

Suggested-by: Deborah Townsend <dstownse@us.ibm.com>
Signed-off-by: Jiri Bohac <jbohac@suse.cz>
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/20140418152310.GA13654@midget.suse.cz
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
10 years agohrtimer: Prevent remote enqueue of leftmost timers
Leon Ma [Wed, 30 Apr 2014 08:43:10 +0000 (16:43 +0800)]
hrtimer: Prevent remote enqueue of leftmost timers

If a cpu is idle and starts an hrtimer which is not pinned on that
same cpu, the nohz code might target the timer to a different cpu.

In the case that we switch the cpu base of the timer we already have a
sanity check in place, which determines whether the timer is earlier
than the current leftmost timer on the target cpu. In that case we
enqueue the timer on the current cpu because we cannot reprogram the
clock event device on the target.

If the timers base is already the target CPU we do not have this
sanity check in place so we enqueue the timer as the leftmost timer in
the target cpus rb tree, but we cannot reprogram the clock event
device on the target cpu. So the timer expires late and subsequently
prevents the reprogramming of the target cpu clock event device until
the previously programmed event fires or a timer with an earlier
expiry time gets enqueued on the target cpu itself.

Add the same target check as we have for the switch base case and
start the timer on the current cpu if it would become the leftmost
timer on the target.

[ tglx: Rewrote subject and changelog ]

Signed-off-by: Leon Ma <xindong.ma@intel.com>
Link: http://lkml.kernel.org/r/1398847391-5994-1-git-send-email-xindong.ma@intel.com
Cc: stable@vger.kernel.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
10 years agohrtimer: Prevent all reprogramming if hang detected
Stuart Hayes [Tue, 29 Apr 2014 22:55:02 +0000 (17:55 -0500)]
hrtimer: Prevent all reprogramming if hang detected

If the last hrtimer interrupt detected a hang it sets hang_detected=1
and programs the clock event device with a delay to let the system
make progress.

If hang_detected == 1, we prevent reprogramming of the clock event
device in hrtimer_reprogram() but not in hrtimer_force_reprogram().

This can lead to the following situation:

hrtimer_interrupt()
   hang_detected = 1;
   program ce device to Xms from now (hang delay)

We have two timers pending:
   T1 expires 50ms from now
   T2 expires 5s from now

Now T1 gets canceled, which causes hrtimer_force_reprogram() to be
invoked, which in turn programs the clock event device to T2 (5
seconds from now).

Any hrtimer_start after that will not reprogram the hardware due to
hang_detected still being set. So we effectivly block all timers until
the T2 event fires and cleans up the hang situation.

Add a check for hang_detected to hrtimer_force_reprogram() which
prevents the reprogramming of the hang delay in the hardware
timer. The subsequent hrtimer_interrupt will resolve all outstanding
issues.

[ tglx: Rewrote subject and changelog and fixed up the comment in
   hrtimer_force_reprogram() ]

Signed-off-by: Stuart Hayes <stuart.w.hayes@gmail.com>
Link: http://lkml.kernel.org/r/53602DC6.2060101@gmail.com
Cc: stable@vger.kernel.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
10 years agoMerge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Linus Torvalds [Wed, 30 Apr 2014 00:51:26 +0000 (17:51 -0700)]
Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux

Pull drm fixes from Dave Airlie:
 "Smattering of fixes, i915, exynos, tegra, msm, vmwgfx.

  A bit of framebuffer reference counting fallout fixes, i915 GM45
  regression fix, DVI regression fix, vmware info leak between processes
  fix"

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
  drm/exynos: use %pad for dma_addr_t
  drm/exynos: dsi: use IS_ERR() to check devm_ioremap_resource() results
  MAINTAINERS: update maintainer entry for Exynos DP driver
  drm/exynos: balance framebuffer refcount
  drm/i915: Move all ring resets before setting the HWS page
  drm/i915: Don't WARN nor handle unexpected hpd interrupts on gmch platforms
  drm/msm/mdp4: cure for the cursor blues (v2)
  drm/msm: default to XR24 rather than AR24
  drm/msm: fix memory leak
  drm/tegra: restrict plane loops to legacy planes
  drm/i915: Allow full PPGTT with param override
  drm/i915: Discard BIOS framebuffers too small to accommodate chosen mode
  drm/vmwgfx: Make sure user-space can't DMA across buffer object boundaries v2
  drm/i915: get power domain in case the BIOS enabled eDP VDD
  drm/i915: Don't check gmch state on inherited configs
  drm/i915: Allow user modes to exceed DVI 165MHz limit

10 years agodrm/exynos: use %pad for dma_addr_t
Jingoo Han [Tue, 22 Apr 2014 05:45:32 +0000 (14:45 +0900)]
drm/exynos: use %pad for dma_addr_t

Use %pad for dma_addr_t, because a dma_addr_t type can vary
based on build options. So, it prevents possible build warnings
in printks.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Reviewed-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
10 years agodrm/exynos: dsi: use IS_ERR() to check devm_ioremap_resource() results
Jingoo Han [Thu, 17 Apr 2014 10:08:40 +0000 (19:08 +0900)]
drm/exynos: dsi: use IS_ERR() to check devm_ioremap_resource() results

devm_ioremap_resource() returns an error pointer, not NULL. Thus,
the result should be checked with IS_ERR().

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>