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authorThomas Gleixner <tglx@linutronix.de>2007-09-16 15:36:43 +0200
committerThomas Gleixner <tglx@chaos.(none)>2007-09-16 15:36:43 +0200
commit07eec6af448d13a6a520d9c6f06f2e87f61b567a (patch)
treeeabd8fdf97ab76ff3abfa2c2804bb449f393ca01
parent729c6ba334771f28a54efd7e3b8f5ab9414ce7bc (diff)
downloadlinux-linaro-07eec6af448d13a6a520d9c6f06f2e87f61b567a.tar.gz
clockevents: Enforce oneshot broadcast when broadcast mask is set on resume
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>
-rw-r--r--kernel/time/tick-broadcast.c13
1 files changed, 12 insertions, 1 deletions
diff --git a/kernel/time/tick-broadcast.c b/kernel/time/tick-broadcast.c
index db8e0f3d409..947959fb2bb 100644
--- a/kernel/time/tick-broadcast.c
+++ b/kernel/time/tick-broadcast.c
@@ -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);
}
/*