[LEDE-DEV] [PATCH] ramips: pinctrl: return proper error if pinctrl0 is empty

[John Crispin]

On 26/07/17 08:08, Mathias Kresin wrote:
> Children of the pinctrl0 node are optional. Return EINVAL (=missing)
> instead of 0. Fixes a hang if the pinctrl0 has no children.
>
> Signed-off-by: Mathias Kresin <dev at kresin.me>
Acked-by: John Crispin <john at phrozen.org>
> ---
>   .../ramips/patches-4.9/0025-pinctrl-ralink-add-pinctrl-driver.patch     | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/target/linux/ramips/patches-4.9/0025-pinctrl-ralink-add-pinctrl-driver.patch b/target/linux/ramips/patches-4.9/0025-pinctrl-ralink-add-pinctrl-driver.patch
> index 6e0d643..dc45852 100644
> --- a/target/linux/ramips/patches-4.9/0025-pinctrl-ralink-add-pinctrl-driver.patch
> +++ b/target/linux/ramips/patches-4.9/0025-pinctrl-ralink-add-pinctrl-driver.patch
> @@ -193,7 +193,7 @@ Signed-off-by: John Crispin <blogic at openwrt.org>
>   +	}
>   +
>   +	if (!max_maps)
> -+		return max_maps;
> ++		return -EINVAL;
>   +
>   +	*map = kzalloc(max_maps * sizeof(struct pinctrl_map), GFP_KERNEL);
>   +	if (!*map)