net: renesas: rswitch: Fix return value in error path of xmit

Fix return value in the error path of rswitch_start_xmit(). If TX
queues are full, this function should return NETDEV_TX_BUSY.

Fixes: 3590918b5d07 ("net: ethernet: renesas: Add support for "Ethernet Switch"")
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Link: https://lore.kernel.org/r/20230529073817.1145208-1-yoshihiro.shimoda.uh@renesas.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/ethernet/renesas/rswitch.c b/drivers/net/ethernet/renesas/rswitch.c
index 29afaddb598db4b32acebdfa34667365ab503c85..aace87139cea1088a15ef3a7720dff0edbaca86a 100644 (file)
--- a/drivers/net/ethernet/renesas/rswitch.c
+++ b/drivers/net/ethernet/renesas/rswitch.c
@@ -1485,7 +1485,7 @@ static netdev_tx_t rswitch_start_xmit(struct sk_buff *skb, struct net_device *nd
 
        if (rswitch_get_num_cur_queues(gq) >= gq->ring_size - 1) {
                netif_stop_subqueue(ndev, 0);
-               return ret;
+               return NETDEV_TX_BUSY;
        }
 
        if (skb_put_padto(skb, ETH_ZLEN))