[PATCH] 2.6.18-rt7: PowerPC: fix breakage in threaded fasteoi type IRQ handlers

[Benjamin Herrenschmidt]

> Index: linux/kernel/irq/chip.c
> ===================================================================
> --- linux.orig/kernel/irq/chip.c
> +++ linux/kernel/irq/chip.c
> @@ -238,8 +238,10 @@ static inline void mask_ack_irq(struct i
>  	if (desc->chip->mask_ack)
>  		desc->chip->mask_ack(irq);
>  	else {
> -		desc->chip->mask(irq);
> -		desc->chip->ack(irq);
> +		if (desc->chip->mask)
> +			desc->chip->mask(irq);
> +		if (desc->chip->mask)
> +			desc->chip->ack(irq);

Looks like a typo to me :-)

Cheers,
Ben.