From ac34ad27fc160b5bd31c731cdaaf6e1d1890ccb2 Mon Sep 17 00:00:00 2001 From: Alexandre Belloni Date: Fri, 16 Jan 2015 10:05:51 +0100 Subject: [PATCH] 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 Signed-off-by: Alexandre Belloni Cc: Daniel Lezcano Cc: Nicolas Ferre Cc: Boris Brezillon Cc: Maxime Ripard 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 --- kernel/time/clockevents.c | 4 ++-- 1 file 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); } -- 2.34.1