tree 7af4b7266b29a7a0268fcf68cb5f3a8c23405dd3
parent 04aa530ec04f61875b99c12721162e2964e3318c
author Thomas Gleixner <tglx@linutronix.de> 1353661724 +0100
committer Thomas Gleixner <tglx@linutronix.de> 1355225130 +0100

genirq: Avoid deadlock in spurious handling

commit 52553ddf(genirq: fix regression in irqfixup, irqpoll)
introduced a potential deadlock by calling the action handler with the
irq descriptor lock held.

Remove the call and let the handling code run even for an interrupt
where only a single action is registered. That matches the goal of
the above commit and avoids the deadlock.

Document the confusing action = desc->action reload in the handling
loop while at it.

Reported-and-tested-by: "Wang, Warner" <warner.wang@hp.com>
Tested-by: Edward Donovan <edward.donovan@numble.net>
Cc: "Wang, Song-Bo (Stoney)" <song-bo.wang@hp.com>
Cc: stable@vger.kernel.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>