diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2008-09-16 20:32:50 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2008-09-16 22:47:02 +0200 |
| commit | 2344abbcbdb82140050e8be29d3d55e4f6fe860b (patch) | |
| tree | 46c1842fc2a47aa4d7ee0c2c558f54bc50772b69 /kernel/time/tick-common.c | |
| parent | clocksource, acpi_pm.c: fix check for monotonicity (diff) | |
| download | linux-2344abbcbdb82140050e8be29d3d55e4f6fe860b.tar.xz linux-2344abbcbdb82140050e8be29d3d55e4f6fe860b.zip | |
clockevents: make device shutdown robust
The device shut down does not cleanup the next_event variable of the
clock event device. So when the device is reactivated the possible
stale next_event value can prevent the device to be reprogrammed as it
claims to wait on a event already.
This is the root cause of the resurfacing suspend/resume problem,
where systems need key press to come back to life.
Fix this by setting next_event to KTIME_MAX when the device is shut
down. Use a separate function for shutdown which takes care of that
and only keep the direct set mode call in the broadcast code, where we
can not touch the next_event value.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/time/tick-common.c')
| -rw-r--r-- | kernel/time/tick-common.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/time/tick-common.c b/kernel/time/tick-common.c index c4777193d567..019315ebf9de 100644 --- a/kernel/time/tick-common.c +++ b/kernel/time/tick-common.c @@ -249,7 +249,7 @@ static int tick_check_new_device(struct clock_event_device *newdev) * not give it back to the clockevents layer ! */ if (tick_is_broadcast_device(curdev)) { - clockevents_set_mode(curdev, CLOCK_EVT_MODE_SHUTDOWN); + clockevents_shutdown(curdev); curdev = NULL; } clockevents_exchange_device(curdev, newdev); @@ -311,7 +311,7 @@ static void tick_suspend(void) unsigned long flags; spin_lock_irqsave(&tick_device_lock, flags); - clockevents_set_mode(td->evtdev, CLOCK_EVT_MODE_SHUTDOWN); + clockevents_shutdown(td->evtdev); spin_unlock_irqrestore(&tick_device_lock, flags); } |