[PATCH] batman-adv/main: Fix check on return value of rtnl_link_register

[Aditya Pakki]

rtnl_link_register() may fail and can impact registering the device.
The fix checks the return value and pushes the error upstream.

Signed-off-by: Aditya Pakki <pakki...@umn.edu>
---
 net/batman-adv/main.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/net/batman-adv/main.c b/net/batman-adv/main.c
index 69c0d85bceb3..e0007f242823 100644
--- a/net/batman-adv/main.c
+++ b/net/batman-adv/main.c
@@ -109,7 +109,10 @@ static int __init batadv_init(void)
        batadv_debugfs_init();
 
        register_netdevice_notifier(&batadv_hard_if_notifier);
-       rtnl_link_register(&batadv_link_ops);
+       ret = rtnl_link_register(&batadv_link_ops);
+       if (ret < 0)
+               return ret;
+
        batadv_netlink_register();
 
        pr_info("B.A.T.M.A.N. advanced %s (compatibility version %i) loaded\n",
-- 
2.17.1