Messages in this thread Patch in this message | | | From | Atsushi Nemoto <> | Subject | [PATCH] rtc: Make rtc_update_irq callable with irqs enabled | Date | Tue, 7 Apr 2009 01:50:31 +0900 |
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The rtc_update_irq() might be called with irqs enabled, if a interrupt handler was registered without IRQF_DISABLED. Use spin_lock_irqsave/spin_unlock_irqrestore instead of spin_lock/spin_unlock.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> --- drivers/rtc/interface.c | 10 ++++++---- 1 files changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/rtc/interface.c b/drivers/rtc/interface.c index 4348c4b..a8641f7 100644 --- a/drivers/rtc/interface.c +++ b/drivers/rtc/interface.c @@ -376,14 +376,16 @@ EXPORT_SYMBOL_GPL(rtc_update_irq_enable); void rtc_update_irq(struct rtc_device *rtc, unsigned long num, unsigned long events) { - spin_lock(&rtc->irq_lock); + unsigned long flags; + + spin_lock_irqsave(&rtc->irq_lock, flags); rtc->irq_data = (rtc->irq_data + (num << 8)) | events; - spin_unlock(&rtc->irq_lock); + spin_unlock_irqrestore(&rtc->irq_lock, flags); - spin_lock(&rtc->irq_task_lock); + spin_lock_irqsave(&rtc->irq_task_lock, flags); if (rtc->irq_task) rtc->irq_task->func(rtc->irq_task->private_data); - spin_unlock(&rtc->irq_task_lock); + spin_unlock_irqrestore(&rtc->irq_task_lock, flags); wake_up_interruptible(&rtc->irq_queue); kill_fasync(&rtc->async_queue, SIGIO, POLL_IN); -- 1.5.6.3
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