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authorSony Chacko <sony.chacko@qlogic.com>2016-06-29 17:51:34 -0400
committerDavid S. Miller <davem@davemloft.net>2016-07-01 04:59:49 -0400
commit9216a97a12b069c62f0e927a9f54be4883648a0f (patch)
tree1ade7b47738061328184079a3a2ec920a0151b33
parent43daa96b166c3cf5ff30dfac0c5efa2620e4beab (diff)
downloadlinux-9216a97a12b069c62f0e927a9f54be4883648a0f.tar.gz
qlcnic: add wmb() call in transmit data path.
Call wmb() to ensure writes are complete before hardware fetches updated Tx descriptors. Signed-off-by: Sony Chacko <sony.chacko@qlogic.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/ethernet/qlogic/qlcnic/qlcnic_io.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_io.c b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_io.c
index 607bb7d4514d..87c642d3b075 100644
--- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_io.c
+++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_io.c
@@ -772,6 +772,8 @@ netdev_tx_t qlcnic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
tx_ring->tx_stats.tx_bytes += skb->len;
tx_ring->tx_stats.xmit_called++;
+ /* Ensure writes are complete before HW fetches Tx descriptors */
+ wmb();
qlcnic_update_cmd_producer(tx_ring);
return NETDEV_TX_OK;