serial: 8250: Revert "tty: serial: 8250_core: read only RX if there is something...
authorSebastian Andrzej Siewior <bigeasy@linutronix.de>
Sun, 15 Feb 2015 17:32:16 +0000 (18:32 +0100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Sat, 7 Mar 2015 02:06:51 +0000 (03:06 +0100)
commitca8bb4aefb932e3da105f28cbfba36d57a931081
treea97a7cf075bde126a791c852d85a34709f527148
parent045f32dda9477d3ddf31a4fa862c487d0f747e33
serial: 8250: Revert "tty: serial: 8250_core: read only RX if there is something in the FIFO"

This reverts commit 0aa525d11859c1a4d5b78fdc704148e2ae03ae13.

The conditional RX-FIFO read seems to cause spurious interrupts and we
see just:
|serial8250: too much work for irq29

The previous behaviour was "default" for decades and Marvell's 88f6282 SoC
might not be the only that relies on it. Therefore the Omap fix is
reverted for now.

Fixes: 0aa525d11859 ("tty: serial: 8250_core: read only RX if there is
something in the FIFO")
Reported-By: Nicolas Schichan <nschichan@freebox.fr>
Debuged-By: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/tty/serial/8250/8250_core.c