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ipv6: Fix using after dev_put() 

Patrick McHardy pointed it out.

Signed-off-by: Wang Chen <wangchen@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Wang Chen 2008-07-14 20:54:54 -07:00 committed by David S. Miller
parent 5ae7b44413
commit 7af3db78a9
1 changed files with 5 additions and 3 deletions
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8
net/ipv6/ip6mr.c
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@ -443,6 +443,7 @@ static struct net_device *ip6mr_reg_vif(void)
if (dev_open(dev))
goto failure;
dev_hold(dev);
return dev;
failure:
@ -616,6 +617,7 @@ static int mif6_add(struct mif6ctl *vifc, int mrtsock)
err = dev_set_allmulti(dev, 1);
if (err) {
unregister_netdevice(dev);
dev_put(dev);
return err;
}
break;
@ -624,10 +626,11 @@ static int mif6_add(struct mif6ctl *vifc, int mrtsock)
dev = dev_get_by_index(&init_net, vifc->mif6c_pifi);
if (!dev)
return -EADDRNOTAVAIL;
dev_put(dev);
err = dev_set_allmulti(dev, 1);
if (err)
if (err) {
dev_put(dev);
return err;
}
break;
default:
return -EINVAL;
@ -651,7 +654,6 @@ static int mif6_add(struct mif6ctl *vifc, int mrtsock)
/* And finish update writing critical data */
write_lock_bh(&mrt_lock);
dev_hold(dev);
v->dev = dev;
#ifdef CONFIG_IPV6_PIMSM_V2
if (v->flags & MIFF_REGISTER)