macvtap: fix uninitialized return value macvtap_ioctl_set_queue()

Return -EINVAL on illegal flag instead of uninitialized value. This fixes the
kbuild test warning.

Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/net/macvtap.c b/drivers/net/macvtap.c
index edcbf1c0d6ed..5a76f20776af 100644
--- a/drivers/net/macvtap.c
+++ b/drivers/net/macvtap.c
@@ -969,6 +969,8 @@ static int macvtap_ioctl_set_queue(struct file *file, unsigned int flags)
                 ret = macvtap_enable_queue(vlan->dev, file, q);
         else if (flags & IFF_DETACH_QUEUE)
                 ret = macvtap_disable_queue(q);
+        else
+                ret = -EINVAL;
 
         macvtap_put_vlan(vlan);
         return ret;