datapath: fix dp check in ovs_dp_reset_user_features

This fixes crash when userspace does "ovs-dpctl add-dp dev" where dev is
existing non-dp netdevice.

Introduced by:
commit 94358dcffbec33cbcfd425e925139fd7e9d6153f
"openvswitch: Drop user features if old user space attempted to create datapath"

Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: Jesse Gross <jesse@nicira.com>

diff --git a/datapath/datapath.c b/datapath/datapath.c
index f496509..bacc634 100644 (file)
--- a/datapath/datapath.c
+++ b/datapath/datapath.c
@@ -1176,7 +1176,7 @@ static void ovs_dp_reset_user_features(struct sk_buff *skb, struct genl_info *in
        struct datapath *dp;
 
        dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
-       if (!dp)
+       if (IS_ERR(dp))
                return;
 
        WARN(dp->user_features, "Dropping previously announced user features\n");