[PATCH] aoa: fix feature-call GPIO layer

["Johannes Berg" <johannes@sipsolutions.net>]

I hope this isn't too badly mangled... I'm without a proper mail client
right now because my ~ is corrupted enough to be put offline once I access
it a lot :/ I intend to repair this tomorrow, so if it is mangled I can
resend Tuesday.
---
This fixes the feature-call GPIO layer in snd-aoa which is used on
machines without platform functions so that it doesn't try to look up an
interrupt property for detect device nodes that don't exist.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>

Index: linux-2.6-fetch/sound/aoa/core/snd-aoa-gpio-feature.c
===================================================================
--- linux-2.6-fetch.orig/sound/aoa/core/snd-aoa-gpio-feature.c	2006-07-16
22:10:02.467630929 +0200
+++ linux-2.6-fetch/sound/aoa/core/snd-aoa-gpio-feature.c	2006-07-16
22:13:41.891630929 +0200
@@ -112,7 +112,10 @@ static struct device_node *get_gpio(char

 static void get_irq(struct device_node * np, int *irqptr)
 {
-	*irqptr = irq_of_parse_and_map(np, 0);
+	if (np)
+		*irqptr = irq_of_parse_and_map(np, 0);
+	else
+		*irqptr = NO_IRQ;
 }

 /* 0x4 is outenable, 0x1 is out, thus 4 or 5 */
@@ -322,7 +325,7 @@ static int ftr_set_notify(struct gpio_ru
 		return -EINVAL;
 	}

-	if (irq == -1)
+	if (irq == NO_IRQ)
 		return -ENODEV;

 	mutex_lock(&notif->mutex);