6lowpan: release device on error path

We recently added a new error path and it needs a dev_put().

Fixes: 7adac1ec8198 ('6lowpan: Only make 6lowpan links to IEEE802154 devices')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 1 deletions

diff --git a/net/ieee802154/6lowpan.c b/net/ieee802154/6lowpan.c
index 9497c6f3276b..426b5df1c98f 100644
--- a/net/ieee802154/6lowpan.c
+++ b/net/ieee802154/6lowpan.c
@@ -1358,8 +1358,10 @@ static int lowpan_newlink(struct net *src_net, struct net_device *dev,
         real_dev = dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK]));
         if (!real_dev)
                 return -ENODEV;
-        if (real_dev->type != ARPHRD_IEEE802154)
+        if (real_dev->type != ARPHRD_IEEE802154) {
+                dev_put(real_dev);
                 return -EINVAL;
+        }
 
         lowpan_dev_info(dev)->real_dev = real_dev;
         lowpan_dev_info(dev)->fragment_tag = 0;