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authorAlexandre Belloni <alexandre.belloni@free-electrons.com>2015-01-16 10:05:51 +0100
committerThomas Gleixner <tglx@linutronix.de>2015-05-27 01:03:38 +0200
commitac34ad27fc160b5bd31c731cdaaf6e1d1890ccb2 (patch)
treeb8758f13c1a36c6a2b2067452d62b75d8277ebc3
parente83d0a4106d81dd08b70318f078f3bad6acdc110 (diff)
clockevents: Do not suspend/resume if unused
There is no point in calling suspend/resume for unused clockevents as they are already stopped and disabled. This is really important for AT91 as the hardware is a trainwreck and takes ages to synchronize. Reported-by: Sylvain Rochet <sylvain.rochet@finsecur.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Nicolas Ferre <nicolas.ferre@atmel.com> Cc: Boris Brezillon <boris.brezillon@free-electrons.com> Cc: Maxime Ripard <maxime.ripard@free-electrons.com> Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/1421399151-26800-1-git-send-email-alexandre.belloni@free-electrons.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
-rw-r--r--kernel/time/clockevents.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/time/clockevents.c b/kernel/time/clockevents.c
index 4922f1b805ea..2a5c369e50ab 100644
--- a/kernel/time/clockevents.c
+++ b/kernel/time/clockevents.c
@@ -638,7 +638,7 @@ void clockevents_suspend(void)
struct clock_event_device *dev;
list_for_each_entry_reverse(dev, &clockevent_devices, list)
- if (dev->suspend)
+ if (dev->suspend && dev->mode != CLOCK_EVT_MODE_UNUSED)
dev->suspend(dev);
}
@@ -650,7 +650,7 @@ void clockevents_resume(void)
struct clock_event_device *dev;
list_for_each_entry(dev, &clockevent_devices, list)
- if (dev->resume)
+ if (dev->resume && dev->mode != CLOCK_EVT_MODE_UNUSED)
dev->resume(dev);
}