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cpuidle: fix broadcast control when broadcast can not be entered

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When failing to enter broadcast timer mode for an idle state that
requires it, a new state is selected that does not require broadcast,
but the broadcast variable remains set. This causes
tick_broadcast_exit to be called despite not having entered broadcast
mode.

This causes the WARN_ON_ONCE(!irqs_disabled()) to trigger in some
cases. It does not appear to cause problems for code today, but seems
to violate the interface so should be fixed.

Signed-off-by: Nicholas Piggin <[email protected]>
Reviewed-by: Thomas Gleixner <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
This commit is contained in:
Nicholas Piggin 2017-09-01 14:29:56 +10:00 • committed by Rafael J. Wysocki
commit f187851b9b
1 changed files with 1 additions and 0 deletions
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1
drivers/cpuidle/cpuidle.c
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@ -208,6 +208,7 @@ int cpuidle_enter_state(struct cpuidle_device *dev, struct cpuidle_driver *drv,
return -EBUSY;
}
target_state = &drv->states[index];
broadcast = false;
}
/* Take note of the planned idle state. */