From: Tonghao Zhang <xiangxia.m.yue@gmail.com>
Date: Fri, 1 Nov 2019 14:23:53 +0000 (+0800)
Subject: net: openvswitch: don't unlock mutex when changing the user_features fails
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=4c76bf696a608ea5cc555fe97ec59a9033236604;p=openwrt%2Fstaging%2Fblogic.git

net: openvswitch: don't unlock mutex when changing the user_features fails

Unlocking of a not locked mutex is not allowed.
Other kernel thread may be in critical section while
we unlock it because of setting user_feature fail.

Fixes: 95a7233c4 ("net: openvswitch: Set OvS recirc_id from tc chain index")
Cc: Paul Blakey <paulb@mellanox.com>
Signed-off-by: Tonghao Zhang <xiangxia.m.yue@gmail.com>
Tested-by: Greg Rose <gvrose8192@gmail.com>
Acked-by: William Tu <u9012063@gmail.com>
Acked-by: Pravin B Shelar <pshelar@ovn.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c
index 24cb73e62f55..745033e261aa 100644
--- a/net/openvswitch/datapath.c
+++ b/net/openvswitch/datapath.c
@@ -1657,6 +1657,7 @@ static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
 				ovs_dp_reset_user_features(skb, info);
 		}
 
+		ovs_unlock();
 		goto err_destroy_meters;
 	}
 
@@ -1673,7 +1674,6 @@ static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
 	return 0;
 
 err_destroy_meters:
-	ovs_unlock();
 	ovs_meters_exit(dp);
 err_destroy_ports_array:
 	kfree(dp->ports);