netdev - [PATCH net-next v2 3/3] teaming: fix vlan

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Message-Id: <0a5534b35e7fffcb3fa0b25fc9a179b7c45b19ee.1400565116.git.mkubecek@suse.cz>
Date:	Tue, 20 May 2014 08:29:45 +0200 (CEST)
From:	Michal Kubecek <mkubecek@...e.cz>
To:	"David S. Miller" <davem@...emloft.net>
Cc:	netdev@...r.kernel.org, Patrick McHardy <kaber@...sh.net>,
	Jay Vosburgh <j.vosburgh@...il.com>,
	Veaceslav Falico <vfalico@...il.com>,
	Andy Gospodarek <andy@...yhouse.net>,
	Jiri Pirko <jiri@...nulli.us>,
	Michal Miroslaw <mirq-linux@...e.qmqm.pl>
Subject: [PATCH net-next v2 3/3] teaming: fix vlan_features computing

__team_compute_features() uses netdev_increment_features() to
combine vlan_features of slaves into vlan_features of the team.
As netdev_increment_features() only adds most features and we
start with TEAM_VLAN_FEATURES, we can end up with features none
of the slaves provided.

Initialize vlan_features only with the flags which are both in
TEAM_VLAN_FEATURES and NETIF_F_ALL_FOR_ALL. Right now there is
no such feature so that we actually initialize vlan_features
with zero but stating it explicitely will make the code more
future proof.

Signed-off-by: Michal Kubecek <mkubecek@...e.cz>
---
 drivers/net/team/team.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/team/team.c b/drivers/net/team/team.c
index 767fe61..9a9ce8d 100644
--- a/drivers/net/team/team.c
+++ b/drivers/net/team/team.c
@@ -968,7 +968,7 @@ static void team_port_disable(struct team *team,
 static void __team_compute_features(struct team *team)
 {
 	struct team_port *port;
-	u32 vlan_features = TEAM_VLAN_FEATURES;
+	u32 vlan_features = TEAM_VLAN_FEATURES & NETIF_F_ALL_FOR_ALL;
 	unsigned short max_hard_header_len = ETH_HLEN;
 	unsigned int flags, dst_release_flag = IFF_XMIT_DST_RELEASE;
 
-- 
1.8.1.4

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