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| author | Suresh Siddha <suresh.b.siddha@intel.com> | 2012-04-18 19:27:39 -0700 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2012-04-19 21:27:50 +0200 |
| commit | a6371f80230eaaafd7eef7efeedaa9509bdc982d (patch) | |
| tree | bb2d800c95cde553e126c28cb58133189b015a47 /kernel/time/tick-broadcast.c | |
| parent | b9a6a23566960d0dd3f51e2e68b472cd61911078 (diff) | |
| download | linux-a6371f80230eaaafd7eef7efeedaa9509bdc982d.tar.gz | |
tick: Fix the spurious broadcast timer ticks after resume
During resume, tick_resume_broadcast() programs the broadcast timer in oneshot mode unconditionally. On the platforms where broadcast timer is not really required, this will generate spurious broadcast timer ticks upon resume. For example, on the always running apic timer platforms with HPET, I see spurious hpet tick once every ~5minutes (which is the 32-bit hpet counter wraparound time). Similar to boot time, during resume make the oneshot mode setting of the broadcast clock event device conditional on the state of active broadcast users. Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Tested-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Tested-by: svenjoac@gmx.de Cc: torvalds@linux-foundation.org Cc: rjw@sisk.pl Link: http://lkml.kernel.org/r/1334802459.28674.209.camel@sbsiddha-desk.sc.intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/time/tick-broadcast.c')
| -rw-r--r-- | kernel/time/tick-broadcast.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/time/tick-broadcast.c b/kernel/time/tick-broadcast.c index 029531f3818c..f113755695e2 100644 --- a/kernel/time/tick-broadcast.c +++ b/kernel/time/tick-broadcast.c @@ -346,7 +346,8 @@ int tick_resume_broadcast(void) tick_get_broadcast_mask()); break; case TICKDEV_MODE_ONESHOT: - broadcast = tick_resume_broadcast_oneshot(bc); + if (!cpumask_empty(tick_get_broadcast_mask())) + broadcast = tick_resume_broadcast_oneshot(bc); break; } } |