[PATCH net] macvlan: Return error on register_netdevice_notifier() failure

[Shigeru Yoshida]

register_netdevice_notifier() may fail, but macvlan_init_module() does
not handle the failure.  Handle the failure by returning an error.

Fixes: b863ceb7ddce ("[NET]: Add macvlan driver")
Signed-off-by: Shigeru Yoshida <syoshida@xxxxxxxxxx>
---
 drivers/net/macvlan.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c
index 24298a33e0e9..ae2f1a8325a5 100644
--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -1849,7 +1849,9 @@ static int __init macvlan_init_module(void)
 {
 	int err;
 
-	register_netdevice_notifier(&macvlan_notifier_block);
+	err = register_netdevice_notifier(&macvlan_notifier_block);
+	if (err < 0)
+		return err;
 
 	err = macvlan_link_register(&macvlan_link_ops);
 	if (err < 0)
-- 
2.45.2