linux-kernel - [PATCH] clockevents: check 'state' instead of 'mode' in suspend/resume path

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Date:	Wed, 17 Jun 2015 16:04:46 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	linaro-kernel@...ts.linaro.org, linux-kernel@...r.kernel.org,
	alexandre.belloni@...e-electrons.com, sylvain.rochet@...secur.com,
	Viresh Kumar <viresh.kumar@...aro.org>
Subject: [PATCH] clockevents: check 'state' instead of 'mode' in suspend/resume path

CLOCK_EVT_MODE_* macros are present for backward compatibility (as most
of the drivers are still using old ->set_mode() interface).

These macro's shouldn't be used anymore in code, that is common to both
driver interfaces, i.e. ->set_mode() and ->set_state_*().

Drivers implementing ->set_state_*() interface, which have their
clkevt->mode set to 0 (clkevt device structures are normally globally
defined), will not participate in suspend/resume as they will always be
marked as UNUSED.

Fix this by checking state of the clockevent device instead of mode,
which is updated for both the interfaces.

Fixes: ac34ad27fc16 ("clockevents: Do not suspend/resume if unused")
Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>
---
 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 2397b97320d8..08ccc3da3ca0 100644
--- a/kernel/time/clockevents.c
+++ b/kernel/time/clockevents.c
@@ -639,7 +639,7 @@ void clockevents_suspend(void)
 	struct clock_event_device *dev;
 
 	list_for_each_entry_reverse(dev, &clockevent_devices, list)
-		if (dev->suspend && dev->mode != CLOCK_EVT_MODE_UNUSED)
+		if (dev->suspend && !clockevent_state_detached(dev))
 			dev->suspend(dev);
 }
 
@@ -651,7 +651,7 @@ void clockevents_resume(void)
 	struct clock_event_device *dev;
 
 	list_for_each_entry(dev, &clockevent_devices, list)
-		if (dev->resume && dev->mode != CLOCK_EVT_MODE_UNUSED)
+		if (dev->resume && !clockevent_state_detached(dev))
 			dev->resume(dev);
 }
 
-- 
2.4.0

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