Thomas Gleixner cc8c3b7843 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>
2010-03-24 14:38:23 +01:00
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