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clockevents: Do not suspend/resume if unused

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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 <[email protected]>
Signed-off-by: Alexandre Belloni <[email protected]>
Cc: Daniel Lezcano <[email protected]>
Cc: Nicolas Ferre <[email protected]>
Cc: Boris Brezillon <[email protected]>
Cc: Maxime Ripard <[email protected]>
Cc: [email protected]
Link: http://lkml.kernel.org/r/1421399151-26800-1-git-send-email-alexandre.belloni@free-electrons.com
Signed-off-by: Thomas Gleixner <[email protected]>
This commit is contained in:
Alexandre Belloni authored and Thomas Gleixner committed 2015-05-27 01:03:38 +02:00
1 parent e83d0a4106
commit ac34ad27fc
1 file changed
+2 -2
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kernel/time/clockevents.c
+2 -2
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@@ -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);
}