diff options
| -rw-r--r-- | drivers/net/ethernet/ibm/ibmvnic.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c index 14f00810db33..7ed87fbb156b 100644 --- a/drivers/net/ethernet/ibm/ibmvnic.c +++ b/drivers/net/ethernet/ibm/ibmvnic.c @@ -1340,6 +1340,19 @@ static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff, txbuff->indir_arr + 1); } +static int ibmvnic_xmit_workarounds(struct sk_buff *skb, + struct net_device *netdev) +{ + /* For some backing devices, mishandling of small packets + * can result in a loss of connection or TX stall. Device + * architects recommend that no packet should be smaller + * than the minimum MTU value provided to the driver, so + * pad any packets to that length + */ + if (skb->len < netdev->min_mtu) + return skb_put_padto(skb, netdev->min_mtu); +} + static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) { struct ibmvnic_adapter *adapter = netdev_priv(netdev); @@ -1377,6 +1390,13 @@ static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) goto out; } + if (ibmvnic_xmit_workarounds(skb, adapter)) { + tx_dropped++; + tx_send_failed++; + ret = NETDEV_TX_OK; + goto out; + } + tx_pool = &adapter->tx_pool[queue_num]; tx_scrq = adapter->tx_scrq[queue_num]; txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb)); |