Messages in this thread Patch in this message | | | From | Colin Cross <> | Subject | [PATCH 1/3] cpuidle: coupled: disable interrupts after entering safe state | Date | Fri, 23 Aug 2013 12:45:10 -0700 |
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Calling cpuidle_enter_state is expected to return with interrupts enabled, but interrupts must be disabled before starting the ready loop synchronization stage. Call local_irq_disable after each call to cpuidle_enter_state for the safe state.
CC: stable@vger.kernel.org Signed-off-by: Colin Cross <ccross@android.com> --- drivers/cpuidle/coupled.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/cpuidle/coupled.c b/drivers/cpuidle/coupled.c index 2a297f8..db92bcb 100644 --- a/drivers/cpuidle/coupled.c +++ b/drivers/cpuidle/coupled.c @@ -460,6 +460,7 @@ int cpuidle_enter_state_coupled(struct cpuidle_device *dev, } entered_state = cpuidle_enter_state(dev, drv, dev->safe_state_index); + local_irq_disable(); } /* Read barrier ensures online_count is read after prevent is cleared */ @@ -485,6 +486,7 @@ retry: entered_state = cpuidle_enter_state(dev, drv, dev->safe_state_index); + local_irq_disable(); } if (cpuidle_coupled_clear_pokes(dev->cpu)) { -- 1.8.3
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