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clockevents: Enforce oneshot broadcast when broadcast mask is set on resume

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The jinxed VAIO refuses to resume without hitting keys on the keyboard
when this is not enforced. It is unclear why the cpu ends up in a lower
C State without notifying the clock events layer, but enforcing the
oneshot broadcast here is safe.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Thomas Gleixner 2007-09-16 15:36:43 +02:00 committed by Thomas Gleixner
parent 729c6ba334
commit 07eec6af44
1 changed files with 12 additions and 1 deletions
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13
kernel/time/tick-broadcast.c
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@ -382,12 +382,23 @@ static int tick_broadcast_set_event(ktime_t expires, int force)
int tick_resume_broadcast_oneshot(struct clock_event_device *bc)
{
int cpu = smp_processor_id();
/*
* If the CPU is marked for broadcast, enforce oneshot
* broadcast mode. The jinxed VAIO does not resume otherwise.
* No idea why it ends up in a lower C State during resume
* without notifying the clock events layer.
*/
if (cpu_isset(cpu, tick_broadcast_mask))
cpu_set(cpu, tick_broadcast_oneshot_mask);
clockevents_set_mode(bc, CLOCK_EVT_MODE_ONESHOT);
if(!cpus_empty(tick_broadcast_oneshot_mask))
tick_broadcast_set_event(ktime_get(), 1);
return cpu_isset(smp_processor_id(), tick_broadcast_oneshot_mask);
return cpu_isset(cpu, tick_broadcast_oneshot_mask);
}
/*