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| author | Rafael J. Wysocki <rjw@sisk.pl> | 2009-12-03 21:03:57 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rjw@sisk.pl> | 2009-12-06 16:17:56 +0100 |
| commit | 0ddf0ed1d47e2d4170fa2989273886a1df66a862 (patch) | |
| tree | 179d0f0de4ef726209c068ea9616f5ccd6a73173 /drivers/base/power/runtime.c | |
| parent | PM / Runtime: Use deferred_resume flag in pm_request_resume (diff) | |
| download | linux-0ddf0ed1d47e2d4170fa2989273886a1df66a862.tar.xz linux-0ddf0ed1d47e2d4170fa2989273886a1df66a862.zip | |
PM / Runtime: Ensure timer_expires is nonzero in pm_schedule_suspend()
The runtime PM core code assumes that dev->power.timer_expires is
nonzero when the timer is scheduled, but it may become zero
incidentally in pm_schedule_suspend(). Prevent this from happening
by bumping dev->power.timer_expires up to 1 if it's 0 before calling
mod_timer().
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Reported-by: Alan Stern <stern@rowland.harvard.edu>
Diffstat (limited to 'drivers/base/power/runtime.c')
| -rw-r--r-- | drivers/base/power/runtime.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c index 6e8577d1f750..637706951885 100644 --- a/drivers/base/power/runtime.c +++ b/drivers/base/power/runtime.c @@ -625,6 +625,8 @@ int pm_schedule_suspend(struct device *dev, unsigned int delay) goto out; dev->power.timer_expires = jiffies + msecs_to_jiffies(delay); + if (!dev->power.timer_expires) + dev->power.timer_expires = 1; mod_timer(&dev->power.suspend_timer, dev->power.timer_expires); out: |