[PATCH 04/18] clocksource/drivers/exynos_mct: Clear timer interrupt when shutdown
From: Daniel Lezcano
Date: Sat Feb 23 2019 - 08:08:05 EST
From: Stuart Menefy <stuart.menefy@xxxxxxxxxxxxxxxx>
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@xxxxxxxxxxxxxxxx>
Reviewed-by: Krzysztof Kozlowski <krzk@xxxxxxxxxx>
Tested-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> # v4.3+
Signed-off-by: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>
---
drivers/clocksource/exynos_mct.c | 1 +
1 file changed, 1 insertion(+)
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;
}
--
2.17.1