From: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx> Date: Fri, 4 May 2018 16:24:44 +0200 > ide_timer_expiry() disables interrupt at function entry when acquiring > hwif->lock. Before disabling the device interrupt it unlocks hwif->lock, > but interrupts stay disabled. After the call to disable_irq() interrupts > are disabled again, which is a pointless exercise. > > After the device irq handler has been invoked with interrupts disabled, > hwif->lock is acquired again with spin_lock_irq() because the device irq > handler might have reenabled interrupts. This is not documented and > confusing for the casual reader. > > Remove the redundant local_irq_disable() and add a comment which explains > why hwif->lock has to be reacquired with spin_lock_irq(). > > Signed-off-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx> Acked-by: David S. Miller <davem@xxxxxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
