#include <linux/slab.h>
#include <linux/kthread.h>
#include <linux/mutex.h>
-#include <linux/utsrelease.h>
+#include <linux/utsname.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
{
struct us_data *us = usb_get_intfdata(iface);
+ US_DEBUGP("%s\n", __FUNCTION__);
+
/* Wait until no command is running */
mutex_lock(&us->dev_mutex);
- US_DEBUGP("%s\n", __FUNCTION__);
if (us->suspend_resume_hook)
(us->suspend_resume_hook)(us, US_SUSPEND);
- iface->dev.power.power_state.event = message.event;
-
- /* When runtime PM is working, we'll set a flag to indicate
- * whether we should autoresume when a SCSI request arrives. */
mutex_unlock(&us->dev_mutex);
return 0;
{
struct us_data *us = usb_get_intfdata(iface);
- mutex_lock(&us->dev_mutex);
-
US_DEBUGP("%s\n", __FUNCTION__);
+
if (us->suspend_resume_hook)
(us->suspend_resume_hook)(us, US_RESUME);
- iface->dev.power.power_state.event = PM_EVENT_ON;
- mutex_unlock(&us->dev_mutex);
+ return 0;
+}
+
+static int storage_reset_resume(struct usb_interface *iface)
+{
+ struct us_data *us = usb_get_intfdata(iface);
+
+ US_DEBUGP("%s\n", __FUNCTION__);
+
+ /* Report the reset to the SCSI core */
+ usb_stor_report_bus_reset(us);
+
+ /* FIXME: Notify the subdrivers that they need to reinitialize
+ * the device */
return 0;
}
* a USB port reset, whether from this driver or a different one.
*/
-static void storage_pre_reset(struct usb_interface *iface)
+static int storage_pre_reset(struct usb_interface *iface)
{
struct us_data *us = usb_get_intfdata(iface);
/* Make sure no command runs during the reset */
mutex_lock(&us->dev_mutex);
+ return 0;
}
-static void storage_post_reset(struct usb_interface *iface)
+static int storage_post_reset(struct usb_interface *iface)
{
struct us_data *us = usb_get_intfdata(iface);
US_DEBUGP("%s\n", __FUNCTION__);
/* Report the reset to the SCSI core */
- scsi_lock(us_to_host(us));
usb_stor_report_bus_reset(us);
- scsi_unlock(us_to_host(us));
/* FIXME: Notify the subdrivers that they need to reinitialize
* the device */
+
mutex_unlock(&us->dev_mutex);
+ return 0;
}
/*
{
struct us_data *us = (struct us_data *)__us;
struct Scsi_Host *host = us_to_host(us);
-
- current->flags |= PF_NOFREEZE;
+ int autopm_rc;
for(;;) {
US_DEBUGP("*** thread sleeping.\n");
US_DEBUGP("*** thread awakened.\n");
+ /* Autoresume the device */
+ autopm_rc = usb_autopm_get_interface(us->pusb_intf);
+
/* lock the device pointers */
mutex_lock(&(us->dev_mutex));
us->srb->result = SAM_STAT_GOOD;
}
+ /* Did the autoresume fail? */
+ else if (autopm_rc < 0) {
+ US_DEBUGP("Could not wake device\n");
+ us->srb->result = DID_ERROR << 16;
+ }
+
/* we've got a command, let's do it! */
else {
US_DEBUG(usb_stor_show_command(us->srb));
/* unlock the device pointers */
mutex_unlock(&us->dev_mutex);
- } /* for (;;) */
- scsi_host_put(host);
+ /* Start an autosuspend */
+ if (autopm_rc == 0)
+ usb_autopm_put_interface(us->pusb_intf);
+ } /* for (;;) */
- /* notify the exit routine that we're actually exiting now
- *
- * complete()/wait_for_completion() is similar to up()/down(),
- * except that complete() is safe in the case where the structure
- * is getting deleted in a parallel mode of execution (i.e. just
- * after the down() -- that's necessary for the thread-shutdown
- * case.
- *
- * complete_and_exit() goes even further than this -- it is safe in
- * the case that the thread of the caller is going away (not just
- * the structure) -- this is necessary for the module-remove case.
- * This is important in preemption kernels, which transfer the flow
- * of execution immediately upon a complete().
- */
- complete_and_exit(&threads_gone, 0);
+ /* Wait until we are told to stop */
+ for (;;) {
+ set_current_state(TASK_INTERRUPTIBLE);
+ if (kthread_should_stop())
+ break;
+ schedule();
+ }
+ __set_current_state(TASK_RUNNING);
+ return 0;
}
/***********************************************************************
idesc->bInterfaceSubClass,
idesc->bInterfaceProtocol,
msgs[msg],
- UTS_RELEASE);
+ utsname()->release);
}
return 0;
struct usb_endpoint_descriptor *ep_int = NULL;
/*
- * Find the endpoints we need.
+ * Find the first endpoint of each type we need.
* We are expecting a minimum of 2 endpoints - in and out (bulk).
- * An optional interrupt is OK (necessary for CBI protocol).
+ * An optional interrupt-in is OK (necessary for CBI protocol).
* We will ignore any others.
*/
for (i = 0; i < altsetting->desc.bNumEndpoints; i++) {
ep = &altsetting->endpoint[i].desc;
- /* Is it a BULK endpoint? */
if (usb_endpoint_xfer_bulk(ep)) {
- /* BULK in or out? */
- if (usb_endpoint_dir_in(ep))
- ep_in = ep;
- else
- ep_out = ep;
+ if (usb_endpoint_dir_in(ep)) {
+ if (!ep_in)
+ ep_in = ep;
+ } else {
+ if (!ep_out)
+ ep_out = ep;
+ }
}
- /* Is it an interrupt endpoint? */
- else if (usb_endpoint_xfer_int(ep)) {
- ep_int = ep;
+ else if (usb_endpoint_is_int_in(ep)) {
+ if (!ep_int)
+ ep_int = ep;
}
}
}
/* Start up our control thread */
- th = kthread_create(usb_stor_control_thread, us, "usb-storage");
+ th = kthread_run(usb_stor_control_thread, us, "usb-storage");
if (IS_ERR(th)) {
printk(KERN_WARNING USB_STORAGE
"Unable to start control thread\n");
return PTR_ERR(th);
}
-
- /* Take a reference to the host for the control thread and
- * count it among all the threads we have launched. Then
- * start it up. */
- scsi_host_get(us_to_host(us));
- atomic_inc(&total_threads);
- wake_up_process(th);
+ us->ctl_thread = th;
return 0;
}
US_DEBUGP("-- sending exit command to thread\n");
set_bit(US_FLIDX_DISCONNECTING, &us->flags);
up(&us->sema);
+ if (us->ctl_thread)
+ kthread_stop(us->ctl_thread);
/* Call the destructor routine, if it exists */
if (us->extra_destructor) {
printk(KERN_DEBUG
"usb-storage: device found at %d\n", us->pusb_dev->devnum);
+ set_freezable();
/* Wait for the timeout to expire or for a disconnect */
if (delay_use > 0) {
printk(KERN_DEBUG "usb-storage: waiting for device "
}
scsi_host_put(us_to_host(us));
+ usb_autopm_put_interface(us->pusb_intf);
complete_and_exit(&threads_gone, 0);
}
* start it up. */
scsi_host_get(us_to_host(us));
atomic_inc(&total_threads);
+ usb_autopm_get_interface(intf); /* dropped in the scanning thread */
wake_up_process(th);
return 0;
#ifdef CONFIG_PM
.suspend = storage_suspend,
.resume = storage_resume,
+ .reset_resume = storage_reset_resume,
#endif
.pre_reset = storage_pre_reset,
.post_reset = storage_post_reset,
.id_table = storage_usb_ids,
+ .supports_autosuspend = 1,
};
static int __init usb_stor_init(void)
git.samba.org / sfrench / cifs-2.6.git / blobdiff