net/mlx4_en: Use local var for skb_headlen(skb)

Access skb_headlen() once in tx flow

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Amir Vadai <amirv@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 11 insertions, 10 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx4/en_tx.c b/drivers/net/ethernet/mellanox/mlx4/en_tx.c
index aa05b09a0d0e..e00841aa03c3 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_tx.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_tx.c
@@ -612,6 +612,7 @@ static void build_inline_wqe(struct mlx4_en_tx_desc *tx_desc,
 {
         struct mlx4_wqe_inline_seg *inl = &tx_desc->inl;
         int spc = MLX4_INLINE_ALIGN - CTRL_SIZE - sizeof *inl;
+        unsigned int hlen = skb_headlen(skb);
 
         if (skb->len <= spc) {
                 if (likely(skb->len >= MIN_PKT_LEN)) {
@@ -621,19 +622,19 @@ static void build_inline_wqe(struct mlx4_en_tx_desc *tx_desc,
                         memset(((void *)(inl + 1)) + skb->len, 0,
                                MIN_PKT_LEN - skb->len);
                 }
-                skb_copy_from_linear_data(skb, inl + 1, skb_headlen(skb));
+                skb_copy_from_linear_data(skb, inl + 1, hlen);
                 if (shinfo->nr_frags)
-                        memcpy(((void *)(inl + 1)) + skb_headlen(skb), fragptr,
+                        memcpy(((void *)(inl + 1)) + hlen, fragptr,
                                skb_frag_size(&shinfo->frags[0]));
 
         } else {
                 inl->byte_count = cpu_to_be32(1 << 31 | spc);
-                if (skb_headlen(skb) <= spc) {
-                        skb_copy_from_linear_data(skb, inl + 1, skb_headlen(skb));
-                        if (skb_headlen(skb) < spc) {
-                                memcpy(((void *)(inl + 1)) + skb_headlen(skb),
-                                        fragptr, spc - skb_headlen(skb));
-                                fragptr +=  spc - skb_headlen(skb);
+                if (hlen <= spc) {
+                        skb_copy_from_linear_data(skb, inl + 1, hlen);
+                        if (hlen < spc) {
+                                memcpy(((void *)(inl + 1)) + hlen,
+                                       fragptr, spc - hlen);
+                                fragptr +=  spc - hlen;
                         }
                         inl = (void *) (inl + 1) + spc;
                         memcpy(((void *)(inl + 1)), fragptr, skb->len - spc);
@@ -641,9 +642,9 @@ static void build_inline_wqe(struct mlx4_en_tx_desc *tx_desc,
                         skb_copy_from_linear_data(skb, inl + 1, spc);
                         inl = (void *) (inl + 1) + spc;
                         skb_copy_from_linear_data_offset(skb, spc, inl + 1,
-                                        skb_headlen(skb) - spc);
+                                                         hlen - spc);
                         if (shinfo->nr_frags)
-                                memcpy(((void *)(inl + 1)) + skb_headlen(skb) - spc,
+                                memcpy(((void *)(inl + 1)) + hlen - spc,
                                        fragptr,
                                        skb_frag_size(&shinfo->frags[0]));
                 }