[PATCH 1/5] aoa: feature gpio layer: fix IRQ access

[Benjamin Herrenschmidt]

On Tue, 2006-07-18 at 19:28 +0200, Johannes Berg wrote:
> plain text document attachment (aoa-get-irq-fix.patch)
> 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.
> 
> Signed-off-by: Johannes Berg <johannes at sipsolutions.net>

Acked-by: Benjamin Herrenschmidt <benh at kernel.crashing.org>

> 
> --- 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);
> 
> --