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| author | Thomas Gleixner <tglx@linutronix.de> | 2008-09-16 11:32:50 -0700 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2008-09-16 13:47:02 -0700 |
| commit | 2344abbcbdb82140050e8be29d3d55e4f6fe860b (patch) | |
| tree | 46c1842fc2a47aa4d7ee0c2c558f54bc50772b69 /kernel/time/tick-internal.h | |
| parent | f1926ce63b996b42772b39e4b47bb4ef4ba748b4 (diff) | |
| download | talos-obmc-linux-2344abbcbdb82140050e8be29d3d55e4f6fe860b.tar.gz talos-obmc-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-internal.h')
| -rw-r--r-- | kernel/time/tick-internal.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/time/tick-internal.h b/kernel/time/tick-internal.h index 0ffc2918ea6f..6e9db9734aa6 100644 --- a/kernel/time/tick-internal.h +++ b/kernel/time/tick-internal.h @@ -10,6 +10,8 @@ extern int tick_do_timer_cpu __read_mostly; extern void tick_setup_periodic(struct clock_event_device *dev, int broadcast); extern void tick_handle_periodic(struct clock_event_device *dev); +extern void clockevents_shutdown(struct clock_event_device *dev); + /* * NO_HZ / high resolution timer shared code */ |
