4.9-stable review patch. If anyone has any objections, please let me know.
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From: Stuart Menefy stuart.menefy@mathembedded.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@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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.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; }