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[ALSA] aoa: feature gpio layer: fix IRQ access

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The IRQ rework caused some hiccups here, in some cases we call
get_irq without a device node. This patch makes it catch that
case and return NO_IRQ when it happens, along with changing the
place where the irq is checked to check for NO_IRQ instead of -1.
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
This commit is contained in:
Johannes Berg 2006-07-25 16:12:51 +02:00 committed by Jaroslav Kysela
parent 59feddb25f
commit 2566d36ab4
1 changed files with 5 additions and 2 deletions
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7
sound/aoa/core/snd-aoa-gpio-feature.c
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@ -112,7 +112,10 @@ static struct device_node *get_gpio(char *name,
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_runtime *rt,
return -EINVAL;
}
if (irq == -1)
if (irq == NO_IRQ)
return -ENODEV;
mutex_lock(&notif->mutex);