[PATCH 2/2] mpic_u3msi: mpic_u3msi: failed allocation unnoticed

[Segher Boessenkool]

> bitmap_find_free_region(), called by mpic_msi_alloc_hwirqs() may
> return -ENOMEM, but hwirq of type irq_hw_number_t which is unsigned.

>  	list_for_each_entry(entry, &pdev->msi_list, list) {
>  		hwirq = mpic_msi_alloc_hwirqs(msi_mpic, 1);
> -		if (hwirq < 0) {
> +		if (hwirq == -ENOMEM) {
>  			pr_debug("u3msi: failed allocating hwirq\n");
>  			return hwirq;
>  		}

Please test for _all_ error values, instead.


Segher