linux-kernel - [tip:timers/urgent] tick-common: Fix wrong check in tick_check

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Message-ID: <tip-521c42990e9d561ed5ed9f501f07639d0512b3c9@git.kernel.org>
Date:	Tue, 15 Apr 2014 11:45:32 -0700
From:	tip-bot for Viresh Kumar <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...nel.org,
	viresh.kumar@...aro.org, tglx@...utronix.de
Subject: [tip:timers/urgent] tick-common:
  Fix wrong check in tick_check_replacement()

Commit-ID:  521c42990e9d561ed5ed9f501f07639d0512b3c9
Gitweb:     http://git.kernel.org/tip/521c42990e9d561ed5ed9f501f07639d0512b3c9
Author:     Viresh Kumar <viresh.kumar@...aro.org>
AuthorDate: Tue, 15 Apr 2014 10:54:37 +0530
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Tue, 15 Apr 2014 20:26:44 +0200

tick-common: Fix wrong check in tick_check_replacement()

tick_check_replacement() returns if a replacement of clock_event_device is
possible or not. It does this as the first check:

	if (tick_check_percpu(curdev, newdev, smp_processor_id()))
		return false;

Thats wrong. tick_check_percpu() returns true when the device is
useable. Check for false instead.

[ tglx: Massaged changelog ]

Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>
Cc: <stable@...r.kernel.org> # v3.11+
Cc: linaro-kernel@...ts.linaro.org
Cc: fweisbec@...il.com
Cc: Arvind.Chauhan@....com
Cc: linaro-networking@...aro.org
Link: http://lkml.kernel.org/r/486a02efe0246635aaba786e24b42d316438bf3b.1397537987.git.viresh.kumar@linaro.org
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
 kernel/time/tick-common.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/time/tick-common.c b/kernel/time/tick-common.c
index 0156612..0a0608e 100644
--- a/kernel/time/tick-common.c
+++ b/kernel/time/tick-common.c
@@ -276,7 +276,7 @@ static bool tick_check_preferred(struct clock_event_device *curdev,
 bool tick_check_replacement(struct clock_event_device *curdev,
 			    struct clock_event_device *newdev)
 {
-	if (tick_check_percpu(curdev, newdev, smp_processor_id()))
+	if (!tick_check_percpu(curdev, newdev, smp_processor_id()))
 		return false;
 
 	return tick_check_preferred(curdev, newdev);
--
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