This is a note to let you know that I've just added the patch titled
PM / Sleep: avoid 'autosleep' in shutdown progress
to the 3.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
pm-sleep-avoid-autosleep-in-shutdown-progress.patch
and it can be found in the queue-3.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From e5248a111bf4048a9f3fab1a9c94c4630a10592a Mon Sep 17 00:00:00 2001
From: Liu ShuoX <shuox.liu@xxxxxxxxx>
Date: Thu, 11 Jul 2013 16:03:45 +0800
Subject: PM / Sleep: avoid 'autosleep' in shutdown progress
From: Liu ShuoX <shuox.liu@xxxxxxxxx>
commit e5248a111bf4048a9f3fab1a9c94c4630a10592a upstream.
Prevent automatic system suspend from happening during system
shutdown by making try_to_suspend() check system_state and return
immediately if it is not SYSTEM_RUNNING.
This prevents the following breakage from happening (scenario from
Zhang Yanmin):
Kernel starts shutdown and calls all device driver's shutdown
callback. When a driver's shutdown is called, the last wakelock is
released and suspend-to-ram starts. However, as some driver's shut
down callbacks already shut down devices and disabled runtime pm,
the suspend-to-ram calls driver's suspend callback without noticing
that device is already off and causes crash.
[rjw: Changelog]
Signed-off-by: Liu ShuoX <shuox.liu@xxxxxxxxx>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
kernel/power/autosleep.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/kernel/power/autosleep.c
+++ b/kernel/power/autosleep.c
@@ -32,7 +32,8 @@ static void try_to_suspend(struct work_s
mutex_lock(&autosleep_lock);
- if (!pm_save_wakeup_count(initial_count)) {
+ if (!pm_save_wakeup_count(initial_count) ||
+ system_state != SYSTEM_RUNNING) {
mutex_unlock(&autosleep_lock);
goto out;
}
Patches currently in stable-queue which might be from shuox.liu@xxxxxxxxx are
queue-3.10/pm-sleep-avoid-autosleep-in-shutdown-progress.patch
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