Commit 8b7f0715 authored Aug 22, 2007 by Andrew Morton Committed by Linus Torvalds Aug 22, 2007

free_irq(): fix DEBUG_SHIRQ handling

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>

parent 436bbd43

kernel/irq/manage.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -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
		}