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[3/3,Wily,SRU] net/mlx5e: Fix inline header size calculation

Message ID 1452615034-24552-3-git-send-email-tim.gardner@canonical.com
State New
Headers show

Commit Message

Tim Gardner Jan. 12, 2016, 4:10 p.m. UTC 
From: Saeed Mahameed <saeedm@mellanox.com>

BugLink: http://bugs.launchpad.net/bugs/1533249

mlx5e_get_inline_hdr_size didn't take into account the vlan insertion
into the inline WQE segment.
This could lead to max inline violation in cases where
skb_headlen(skb) + VLAN_HLEN >= sq->max_inline.

Fixes: 3ea4891db8d0 ("net/mlx5e: Fix LSO vlan insertion")
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Achiad Shochat <achiad@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit ba6c4c094470dc83a7275000bac2fbd46bd5ab69)
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_tx.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)
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Patch

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_tx.c
index bd126a8..d705405 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tx.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tx.c
@@ -118,8 +118,15 @@  static inline u16 mlx5e_get_inline_hdr_size(struct mlx5e_sq *sq,
 	 */
 #define MLX5E_MIN_INLINE ETH_HLEN
 
-	if (bf && (skb_headlen(skb) <= sq->max_inline))
-		return skb_headlen(skb);
+	if (bf) {
+		u16 ihs = skb_headlen(skb);
+
+		if (skb_vlan_tag_present(skb))
+			ihs += VLAN_HLEN;
+
+		if (ihs <= sq->max_inline)
+			return skb_headlen(skb);
+	}
 
 	return MLX5E_MIN_INLINE;
 }