diff mbox series

[04/18] clocksource/drivers/exynos_mct: Clear timer interrupt when shutdown

Message ID 20190223130707.16704-4-daniel.lezcano@linaro.org
State New
Headers show
Series [01/18] clocksource/drivers/sun5i: Fail gracefully when clock rate is unavailable | expand

Commit Message

Daniel Lezcano Feb. 23, 2019, 1:06 p.m. UTC 
From: Stuart Menefy <stuart.menefy@mathembedded.com>


When shutting down the timer, ensure that after we have stopped the
timer any pending interrupts are cleared. This fixes a problem when
suspending, as interrupts are disabled before the timer is stopped,
so the timer interrupt may still be asserted, preventing the system
entering a low power state when the wfi is executed.

Signed-off-by: Stuart Menefy <stuart.menefy@mathembedded.com>

Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>

Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>

Cc: <stable@vger.kernel.org> # v4.3+
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

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

-- 
2.17.1
diff mbox series

Patch

diff --git a/drivers/clocksource/exynos_mct.c b/drivers/clocksource/exynos_mct.c
index 1e325f89d408..d55c30f6981d 100644
--- a/drivers/clocksource/exynos_mct.c
+++ b/drivers/clocksource/exynos_mct.c
@@ -411,6 +411,7 @@  static int set_state_shutdown(struct clock_event_device *evt)
 
 	mevt = container_of(evt, struct mct_clock_event_device, evt);
 	exynos4_mct_tick_stop(mevt);
+	exynos4_mct_tick_clear(mevt);
 	return 0;
 }