[net-next,v2,2/2] bonding: unwind on bond_add_vlan failure

From: Nikolay Aleksandrov <Nikolay Aleksandrov nikolay@redhat.com>

In case of bond_add_vlan() failure currently we'll have the vlan's
refcnt bumped up in all slaves, but it will never go down because it
failed to get added to the bond, so properly unwind the added vlan if
bond_add_vlan fails.

Signed-off-by: Nikolay Aleksandrov <nikolay@redhat.com>
---
v2: no changes

 drivers/net/bonding/bond_main.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

On Tue, Aug 06, 2013 at 12:40:16PM +0200, nikolay@redhat.com wrote:
>From: Nikolay Aleksandrov <Nikolay Aleksandrov nikolay@redhat.com>
>
>In case of bond_add_vlan() failure currently we'll have the vlan's
>refcnt bumped up in all slaves, but it will never go down because it
>failed to get added to the bond, so properly unwind the added vlan if
>bond_add_vlan fails.
>
>Signed-off-by: Nikolay Aleksandrov <nikolay@redhat.com>

Acked-by: Veaceslav Falico <vfalico@redhat.com>

>
>---
>v2: no changes
>
> drivers/net/bonding/bond_main.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
>diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
>index 78b0aeb..4264a76 100644
>--- a/drivers/net/bonding/bond_main.c
>+++ b/drivers/net/bonding/bond_main.c
>@@ -455,13 +455,13 @@ static int bond_vlan_rx_add_vid(struct net_device *bond_dev,
> 	if (res) {
> 		pr_err("%s: Error: Failed to add vlan id %d\n",
> 		       bond_dev->name, vid);
>-		return res;
>+		goto unwind;
> 	}
>
> 	return 0;
>
> unwind:
>-	/* unwind from head to the slave that failed */
>+	/* unwind from the slave that failed */
> 	bond_for_each_slave_continue_reverse(bond, slave)
> 		vlan_vid_del(slave->dev, proto, vid);
>
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