From cc8c3b78433222e5dbc1fdfcfdde29e1743f181a Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Tue, 23 Mar 2010 22:40:53 +0100
Subject: [PATCH] genirq: Protect access to irq_desc->action in
 can_request_irq()

can_request_irq() accesses and dereferences irq_desc->action w/o
holding irq_desc->lock. So action can be freed on another CPU before
it's dereferenced. Unlikely, but ...

Protect it with desc->lock.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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