net: fix dev_set_promiscuity() breakage

Commit dad9b335 (netdevice: Fix promiscuity and allmulti overflow) broke
dev_set_promiscuity() by returning on success without reprogramming the
device.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/net/core/dev.c b/net/core/dev.c
index bfa9a6a951dd..75933932463d 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2859,7 +2859,7 @@ int dev_set_promiscuity(struct net_device *dev, int inc)
         int err;
 
         err = __dev_set_promiscuity(dev, inc);
-        if (!err)
+        if (err < 0)
                 return err;
         if (dev->flags != old_flags)
                 dev_set_rx_mode(dev);