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

[Wayen.Yan]

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.

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