Commit-ID: 887708f0ac7641e7d5131409cedf6774f26f0cb6
Gitweb: http://git.kernel.org/tip/887708f0ac7641e7d5131409cedf6774f26f0cb6
Author: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
AuthorDate: Sat, 2 Mar 2013 11:10:13 +0100
Committer: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>
CommitDate: Thu, 22 Aug 2013 00:18:53 +0200
ARM: timer-sp: Set dynamic irq affinity
When a cpu goes to a deep idle state where its local timer is shutdown, it
notifies the time frame work to use the broadcast timer instead.
Unfortunately, the broadcast device could wake up any CPU, including an idle one
which is not concerned by the wake up at all.
This implies, in the worst case, an idle CPU will wake up to send an IPI to
another idle cpu.
This patch fixes this for ARM platforms using timer-sp, by setting
CLOCK_EVT_FEAT_DYNIRQ feature.
Signed-off-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
Signed-off-by: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>
---
arch/arm/common/timer-sp.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/arm/common/timer-sp.c b/arch/arm/common/timer-sp.c
index 023ee63..e901d0f 100644
--- a/arch/arm/common/timer-sp.c
+++ b/arch/arm/common/timer-sp.c
@@ -166,7 +166,8 @@ static int sp804_set_next_event(unsigned long next,
}
static struct clock_event_device sp804_clockevent = {
- .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
+ .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT |
+ CLOCK_EVT_FEAT_DYNIRQ,
.set_mode = sp804_set_mode,
.set_next_event = sp804_set_next_event,
.rating = 300,
--
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