2 files changed, 10 insertions, 4 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx4/en_tx.c b/drivers/net/ethernet/mellanox/mlx4/en_tx.c
index 56e8fbc128f8..69c2fcef9d4c 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_tx.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_tx.c
@@ -876,7 +876,8 @@ netdev_tx_t mlx4_en_xmit(struct sk_buff *skb, struct net_device *dev)
         skb_tx_timestamp(skb);
 
         if (ring->bf_enabled && desc_size <= MAX_BF && !bounce && !vlan_tx_tag_present(skb)) {
-                *(__be32 *) (&tx_desc->ctrl.vlan_tag) |= cpu_to_be32(ring->doorbell_qpn);
+                tx_desc->ctrl.bf_qpn |= cpu_to_be32(ring->doorbell_qpn);
+
                 op_own |= htonl((bf_index & 0xffff) << 8);
                 /* Ensure new descirptor hits memory
                 * before setting ownership of this descriptor to HW */
diff --git a/include/linux/mlx4/qp.h b/include/linux/mlx4/qp.h
index 59f8ba84568b..b66e7610d4ee 100644
--- a/include/linux/mlx4/qp.h
+++ b/include/linux/mlx4/qp.h
@@ -270,9 +270,14 @@ enum {
 
 struct mlx4_wqe_ctrl_seg {
         __be32                  owner_opcode;
-        __be16                  vlan_tag;
-        u8                      ins_vlan;
-        u8                      fence_size;
+        union {
+                struct {
+                        __be16                  vlan_tag;
+                        u8                      ins_vlan;
+                        u8                      fence_size;
+                };
+                __be32                  bf_qpn;
+        };
         /*
          * High 24 bits are SRC remote buffer; low 8 bits are flags:
          * [7]   SO (strong ordering)