Patch "bnx2x: Allow vfs to disable txvlan offload" has been added to the 4.4-stable tree

This is a note to let you know that I've just added the patch titled

bnx2x: Allow vfs to disable txvlan offload

to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
bnx2x-allow-vfs-to-disable-txvlan-offload.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: "Mintz, Yuval" <[email protected]>
Date: Fri, 9 Jun 2017 17:17:01 +0300
Subject: bnx2x: Allow vfs to disable txvlan offload

From: "Mintz, Yuval" <[email protected]>

[ Upstream commit 92f85f05caa51d844af6ea14ffbc7a786446a644 ]

VF clients are configured as enforced, meaning firmware is validating the correctness of their ethertype/vid during transmission. Once txvlan is disabled, VF would start getting SKBs for transmission here vlan is on the payload - but it'll pass the packet's ethertype instead of the vid, leading to firmware declaring it as malicious.

---
 drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c |   19 +++++++++++++++----
 1 file changed, 15 insertions(+), 4 deletions(-)

@@ -3943,15 +3943,26 @@ netdev_tx_t bnx2x_start_xmit(struct sk_b
 		/* when transmitting in a vf, start bd must hold the ethertype
 		 * for fw to enforce it
 		 */
+		u16 vlan_tci = 0;
 #ifndef BNX2X_STOP_ON_ERROR
-		if (IS_VF(bp))
+		if (IS_VF(bp)) {
 #endif
-			tx_start_bd->vlan_or_ethertype =
-				cpu_to_le16(ntohs(eth->h_proto));
+			/* Still need to consider inband vlan for enforced */
+			if (__vlan_get_tag(skb, &vlan_tci)) {
+				tx_start_bd->vlan_or_ethertype =
+					cpu_to_le16(ntohs(eth->h_proto));
+			} else {
+				tx_start_bd->bd_flags.as_bitfield |=
+					(X_ETH_INBAND_VLAN <<
+					 ETH_TX_BD_FLAGS_VLAN_MODE_SHIFT);
+				tx_start_bd->vlan_or_ethertype =
+					cpu_to_le16(vlan_tci);
+			}
 #ifndef BNX2X_STOP_ON_ERROR
-		else
+		} else {
 			/* used by FW for packet accounting */
 			tx_start_bd->vlan_or_ethertype = cpu_to_le16(pkt_prod);
+		}
 #endif
 	}
 

Patches currently in stable-queue which might be from [email protected] are

queue-4.4/bnx2x-allow-vfs-to-disable-txvlan-offload.patch