commit 3418d72404e35eb19e7995cbf3e7a76ba8fefbce
author Thomas Gleixner <tglx@linutronix.de> Thu Jun 29 02:24:49 2006 -0700
committer Linus Torvalds <torvalds@g5.osdl.org> Thu Jun 29 10:26:24 2006 -0700
tree 08e727f94d4ff31410730d5d42119b3520ad10ca
parent a4633adcdbc15ac51afcd0e1395de58cee27cf92

[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>

kernel/irq/autoprobe.c

diff --git a/kernel/irq/autoprobe.c b/kernel/irq/autoprobe.c
index 5c988bb..ed98c7d 100644
--- a/kernel/irq/autoprobe.c
+++ b/kernel/irq/autoprobe.c
@@ -40,7 +40,7 @@
 		desc = irq_desc + i;
 
 		spin_lock_irq(&desc->lock);
-		if (!desc->action)
+		if (!desc->action && !(desc->status & IRQ_NOPROBE))
 			desc->chip->startup(i);
 		spin_unlock_irq(&desc->lock);
 	}
@@ -57,7 +57,7 @@
 		desc = irq_desc + i;
 
 		spin_lock_irq(&desc->lock);
-		if (!desc->action) {
+		if (!desc->action && !(desc->status & IRQ_NOPROBE)) {
 			desc->status |= IRQ_AUTODETECT | IRQ_WAITING;
 			if (desc->chip->startup(i))
 				desc->status |= IRQ_PENDING;