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Date: Fri, 22 Mar 2019 12:15:07 +0100 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Stuart Menefy <stuart.menefy@...hembedded.com>, Krzysztof Kozlowski <krzk@...nel.org>, Marek Szyprowski <m.szyprowski@...sung.com>, Daniel Lezcano <daniel.lezcano@...aro.org> Subject: [PATCH 4.19 154/280] clocksource/drivers/exynos_mct: Clear timer interrupt when shutdown 4.19-stable review patch. If anyone has any objections, please let me know. ------------------ From: Stuart Menefy <stuart.menefy@...hembedded.com> 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 <stuart.menefy@...hembedded.com> Reviewed-by: Krzysztof Kozlowski <krzk@...nel.org> Tested-by: Marek Szyprowski <m.szyprowski@...sung.com> Cc: <stable@...r.kernel.org> # v4.3+ Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> --- drivers/clocksource/exynos_mct.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/clocksource/exynos_mct.c +++ b/drivers/clocksource/exynos_mct.c @@ -411,6 +411,7 @@ static int set_state_shutdown(struct clo mevt = container_of(evt, struct mct_clock_event_device, evt); exynos4_mct_tick_stop(mevt); + exynos4_mct_tick_clear(mevt); return 0; }
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