diff mbox

[3/3] clockevents/exynos_mct: Implement ->set_state_oneshot_stopped()

Message ID 230cc7fd48dcb72312acbc512c724f7da13bec0a.1450869375.git.viresh.kumar@linaro.org
State Accepted
Commit 07f101d33def572c7018626735475f88dabecebf
Headers show

Commit Message

Viresh Kumar Dec. 23, 2015, 11:29 a.m. UTC 
set_state_oneshot_stopped() is called by the clkevt core, when the next
event is required at an expiry time of 'KTIME_MAX'. This normally
happens with NO_HZ_{IDLE|FULL} in both LOWRES/HIGHRES modes.

This patch makes the clockevent device to stop on such an event, to
avoid spurious interrupts, as explained by: commit 8fff52fd5093
("clockevents: Introduce CLOCK_EVT_STATE_ONESHOT_STOPPED state").

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>

---
 drivers/clocksource/exynos_mct.c | 2 ++
 1 file changed, 2 insertions(+)

-- 
2.7.0.rc1.186.g94414c4

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/
diff mbox

Patch

diff --git a/drivers/clocksource/exynos_mct.c b/drivers/clocksource/exynos_mct.c
index ff44082a0827..be09bc0b5e26 100644
--- a/drivers/clocksource/exynos_mct.c
+++ b/drivers/clocksource/exynos_mct.c
@@ -313,6 +313,7 @@  static struct clock_event_device mct_comp_device = {
 	.set_state_periodic	= mct_set_state_periodic,
 	.set_state_shutdown	= mct_set_state_shutdown,
 	.set_state_oneshot	= mct_set_state_shutdown,
+	.set_state_oneshot_stopped = mct_set_state_shutdown,
 	.tick_resume		= mct_set_state_shutdown,
 };
 
@@ -452,6 +453,7 @@  static int exynos4_local_timer_setup(struct mct_clock_event_device *mevt)
 	evt->set_state_periodic = set_state_periodic;
 	evt->set_state_shutdown = set_state_shutdown;
 	evt->set_state_oneshot = set_state_shutdown;
+	evt->set_state_oneshot_stopped = set_state_shutdown;
 	evt->tick_resume = set_state_shutdown;
 	evt->features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT;
 	evt->rating = 450;