Commit ac34ad27 authored Jan 16, 2015 by Alexandre Belloni Committed by Thomas Gleixner May 27, 2015

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>

parent e83d0a41

kernel/time/clockevents.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -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);
		}