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free_irq(): fix DEBUG_SHIRQ handling

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If we're going to run the handler from free_irq() then we must do it with
local irq's disabled.  Otherwise lockdep complains that the handler is taking
irq-safe spinlocks in a non-irq-safe fashion.

Cc: Ingo Molnar <mingo@elte.hu>
Cc: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Andrew Morton 2007-08-22 14:01:20 -07:00 committed by Linus Torvalds
parent 436bbd431d
commit 8b7f07155f
1 changed files with 2 additions and 0 deletions
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2
kernel/irq/manage.c
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@ -462,7 +462,9 @@ void free_irq(unsigned int irq, void *dev_id)
* We do this after actually deregistering it, to make sure that
* a 'real' IRQ doesn't run in parallel with our fake
*/
local_irq_save(flags);
handler(irq, dev_id);
local_irq_restore(flags);
}
#endif
}