sfc: Reject packets from the kernel TX queue during a loopback self-test

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/net/sfc/tx.c b/drivers/net/sfc/tx.c
index da3e9ff339f5..9f97e44840b6 100644
--- a/drivers/net/sfc/tx.c
+++ b/drivers/net/sfc/tx.c
@@ -376,6 +376,9 @@ int efx_hard_start_xmit(struct sk_buff *skb, struct net_device *net_dev)
         struct efx_nic *efx = netdev_priv(net_dev);
         struct efx_tx_queue *tx_queue;
 
+        if (unlikely(efx->port_inhibited))
+                return NETDEV_TX_BUSY;
+
         if (likely(skb->ip_summed == CHECKSUM_PARTIAL))
                 tx_queue = &efx->tx_queue[EFX_TX_QUEUE_OFFLOAD_CSUM];
         else