[PATCH] genirq: add IRQ_NOPROBE support
Introduce IRQ_NOPROBE: enables platforms to control chip-probing.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index cffde48..90a944a 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -118,6 +118,10 @@
WARN_ON(1);
break;
case 1: {
+ unsigned int status = desc->status & ~IRQ_DISABLED;
+
+ /* Prevent probing on this irq: */
+ desc->status = status | IRQ_NOPROBE;
check_irq_resend(desc, irq);
/* fall-through */
}