[PATCH 2/7] sfc: Reject packets from the kernel TX queue during a loopback self-test

[Ben Hutchings <bhutchings@solarflare.com>]

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
---
This is necessary because netif_carrier_off() doesn't stop the queue
immediately.

Ben.

 drivers/net/sfc/tx.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/drivers/net/sfc/tx.c b/drivers/net/sfc/tx.c
index da3e9ff..9f97e44 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
-- 
1.5.5

-- 
Ben Hutchings, Senior Software Engineer, Solarflare Communications
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.