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Date:   Fri, 22 Mar 2019 12:15:23 +0100
From:   Greg Kroah-Hartman <>
Cc:     Greg Kroah-Hartman <>,,
        Stuart Menefy <>,
        Krzysztof Kozlowski <>,
        Marek Szyprowski <>,
        Daniel Lezcano <>
Subject: [PATCH 4.4 185/230] clocksource/drivers/exynos_mct: Clear timer interrupt when shutdown

4.4-stable review patch.  If anyone has any objections, please let me know.


From: Stuart Menefy <>

commit d2f276c8d3c224d5b493c42b6cf006ae4e64fb1c upstream.

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 <>
Reviewed-by: Krzysztof Kozlowski <>
Tested-by: Marek Szyprowski <>
Cc: <> # v4.3+
Signed-off-by: Daniel Lezcano <>
Signed-off-by: Greg Kroah-Hartman <>

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

--- a/drivers/clocksource/exynos_mct.c
+++ b/drivers/clocksource/exynos_mct.c
@@ -402,6 +402,7 @@ static int set_state_shutdown(struct clo
 	mevt = container_of(evt, struct mct_clock_event_device, evt);
+	exynos4_mct_tick_clear(mevt);
 	return 0;

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