linux-kernel - [PATCH] CPUidle: always return with interrupts enabled

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Date:	Wed, 30 Sep 2009 10:35:53 -0700
From:	Kevin Hilman <khilman@...prootsystems.com>
To:	linux-pm@...ts.linux-foundation.org
Cc:	linux-kernel@...r.kernel.org, linux-omap@...r.kernel.org
Subject: [PATCH] CPUidle: always return with interrupts enabled

In the case where cpuidle_idle_call() returns before changing state
due to a need_resched(), it was returning with IRQs disabled.

This patch ensures IRQs are (re)enabled before returning.

Reported-by: Hemanth V <hemanthv@...com>
Signed-off-by: Kevin Hilman <khilman@...prootsystems.com>
---
 drivers/cpuidle/cpuidle.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
index ad41f19..12fdd39 100644
--- a/drivers/cpuidle/cpuidle.c
+++ b/drivers/cpuidle/cpuidle.c
@@ -76,8 +76,11 @@ static void cpuidle_idle_call(void)
 #endif
 	/* ask the governor for the next state */
 	next_state = cpuidle_curr_governor->select(dev);
-	if (need_resched())
+	if (need_resched()) {
+		local_irq_enable();
 		return;
+	}
+
 	target_state = &dev->states[next_state];
 
 	/* enter the state and update stats */
-- 
1.6.4.3

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