linux-kernel - [PATCH 3.12 43/72] bonding: set correct vlan id for alb xmit path

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Date:	Fri, 18 Apr 2014 11:22:16 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org,
	dingtianhong <dingtianhong@...wei.com>,
	Jay Vosburgh <fubar@...ibm.com>,
	Andy Gospodarek <andy@...yhouse.net>,
	"David S. Miller" <davem@...emloft.net>,
	Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 43/72] bonding: set correct vlan id for alb xmit path

From: dingtianhong <dingtianhong@...wei.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

[ Upstream commit fb00bc2e6cd2046282ba4b03f4fe682aee70b2f8 ]

The commit d3ab3ffd1d728d7ee77340e7e7e2c7cfe6a4013e
(bonding: use rlb_client_info->vlan_id instead of ->tag)
remove the rlb_client_info->tag, but occur some issues,
The vlan_get_tag() will return 0 for success and -EINVAL for
error, so the client_info->vlan_id always be set to 0 if the
vlan_get_tag return 0 for success, so the client_info would
never get a correct vlan id.

We should only set the vlan id to 0 when the vlan_get_tag return error.

Fixes: d3ab3ffd1d7 (bonding: use rlb_client_info->vlan_id instead of ->tag)

CC: Ding Tianhong <dingtianhong@...wei.com>
CC: Jay Vosburgh <fubar@...ibm.com>
CC: Andy Gospodarek <andy@...yhouse.net>
Signed-off-by: Ding Tianhong <dingtianhong@...wei.com>
Acked-by: Veaceslav Falico <vfalico@...hat.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 drivers/net/bonding/bond_alb.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/bonding/bond_alb.c b/drivers/net/bonding/bond_alb.c
index f428ef574372..71adb692e457 100644
--- a/drivers/net/bonding/bond_alb.c
+++ b/drivers/net/bonding/bond_alb.c
@@ -694,7 +694,7 @@ static struct slave *rlb_choose_channel(struct sk_buff *skb, struct bonding *bon
 			client_info->ntt = 0;
 		}
 
-		if (!vlan_get_tag(skb, &client_info->vlan_id))
+		if (vlan_get_tag(skb, &client_info->vlan_id))
 			client_info->vlan_id = 0;
 
 		if (!client_info->assigned) {
-- 
1.9.2

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