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>
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 203a518..853aefb 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -462,7 +462,9 @@
* 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
}