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>
diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c
index 6e8577d..6377069 100644
--- a/drivers/base/power/runtime.c
+++ b/drivers/base/power/runtime.c
@@ -625,6 +625,8 @@
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: