From: Sarveshwar Bandi <sarveshwar.bandi@emulex.com>
Date: Tue, 16 Jul 2013 07:14:02 +0000 (+0530)
Subject: be2net: Fix to avoid hardware workaround when not needed
X-Git-Tag: v4.0~3636^2~9
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=52fe29e4bb614367c108b717c6d7fe5953eb7af3;p=platform%2Fkernel%2Flinux-amlogic.git

be2net: Fix to avoid hardware workaround when not needed

Hardware workaround requesting hardware to skip vlan insertion is necessary
only when umc or qnq is enabled. Enabling this workaround in other scenarios
could cause controller to stall.

Signed-off-by: Sarveshwar Bandi <sarveshwar.bandi@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/ethernet/emulex/benet/be_main.c b/drivers/net/ethernet/emulex/benet/be_main.c
index 2df48bb..181edb5 100644
--- a/drivers/net/ethernet/emulex/benet/be_main.c
+++ b/drivers/net/ethernet/emulex/benet/be_main.c
@@ -782,16 +782,22 @@ static struct sk_buff *be_insert_vlan_in_pkt(struct be_adapter *adapter,
 
 	if (vlan_tx_tag_present(skb))
 		vlan_tag = be_get_tx_vlan_tag(adapter, skb);
-	else if (qnq_async_evt_rcvd(adapter) && adapter->pvid)
-		vlan_tag = adapter->pvid;
+
+	if (qnq_async_evt_rcvd(adapter) && adapter->pvid) {
+		if (!vlan_tag)
+			vlan_tag = adapter->pvid;
+		/* f/w workaround to set skip_hw_vlan = 1, informs the F/W to
+		 * skip VLAN insertion
+		 */
+		if (skip_hw_vlan)
+			*skip_hw_vlan = true;
+	}
 
 	if (vlan_tag) {
 		skb = __vlan_put_tag(skb, htons(ETH_P_8021Q), vlan_tag);
 		if (unlikely(!skb))
 			return skb;
 		skb->vlan_tci = 0;
-		if (skip_hw_vlan)
-			*skip_hw_vlan = true;
 	}
 
 	/* Insert the outer VLAN, if any */