macvlan: handle set_promiscuity failures

It's quite unlikely that dev_set_promiscuity will fail,
but worth checking just in case.

Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 2 deletions

diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c
index 13937f9c04ad..d0f9c2fd1d4f 100644
--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -337,8 +337,11 @@ static int macvlan_open(struct net_device *dev)
         int err;
 
         if (vlan->port->passthru) {
-                if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC))
-                        dev_set_promiscuity(lowerdev, 1);
+                if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) {
+                        err = dev_set_promiscuity(lowerdev, 1);
+                        if (err < 0)
+                                goto out;
+                }
                 goto hash_add;
         }