[PATCH] net: airoha: Fix non-standard return value in airoha_ppe_get_wdma_info()

[Lorenzo Bianconi]

> airoha_ppe_get_wdma_info() returns -1 when the last path in the
> forwarding path stack is not of type DEV_PATH_MTK_WDMA. This is not
> a standard kernel error code. Replace it with -EINVAL since the
> input path type is invalid from the caller's perspective.

Acked-by: Lorenzo Bianconi <lorenzo at kernel.org>

> 
> Fixes: 23020f049327 ("net: airoha: Introduce ethernet support for EN7581 SoC")
> Signed-off-by: Wayen.Yan <win847 at gmail.com>
> ---
>  drivers/net/ethernet/airoha/airoha_ppe.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/airoha/airoha_ppe.c b/drivers/net/ethernet/airoha/airoha_ppe.c
> index 5c9dff6..7260177 100644
> --- a/drivers/net/ethernet/airoha/airoha_ppe.c
> +++ b/drivers/net/ethernet/airoha/airoha_ppe.c
> @@ -264,7 +264,7 @@ static int airoha_ppe_get_wdma_info(struct net_device *dev, const u8 *addr,
>  
>  	path = &stack.path[stack.num_paths - 1];
>  	if (path->type != DEV_PATH_MTK_WDMA)
> -		return -1;
> +		return -EINVAL;
>  
>  	info->idx = path->mtk_wdma.wdma_idx;
>  	info->bss = path->mtk_wdma.bss;
> -- 
> 2.51.0
> 
> 
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