1 files changed, 11 insertions, 1 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx4/en_tx.c b/drivers/net/ethernet/mellanox/mlx4/en_tx.c
index a308d41e4de0..e3357bf523df 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_tx.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_tx.c
@@ -962,7 +962,17 @@ netdev_tx_t mlx4_en_xmit(struct sk_buff *skb, struct net_device *dev)
                 tx_desc->ctrl.owner_opcode = op_own;
                 if (send_doorbell) {
                         wmb();
-                        iowrite32(ring->doorbell_qpn,
+                        /* Since there is no iowrite*_native() that writes the
+                         * value as is, without byteswapping - using the one
+                         * the doesn't do byteswapping in the relevant arch
+                         * endianness.
+                         */
+#if defined(__LITTLE_ENDIAN)
+                        iowrite32(
+#else
+                        iowrite32be(
+#endif
+                                  ring->doorbell_qpn,
                                   ring->bf.uar->map + MLX4_SEND_DOORBELL);
                 } else {
                         ring->xmit_more++;