bridge: simplify br_getlink() a bit

Static checkers complain that we should maybe set "ret" before we do the
"goto out;".  They interpret the NULL return from br_port_get_rtnl() as
a failure and forgetting to set the error code is a common bug in this
situation.

The code is confusing but it's actually correct.  We are returning zero
deliberately.  Let's re-write it a bit to be more clear.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c
index 528cf27..3875ea5 100644 (file)
--- a/net/bridge/br_netlink.c
+++ b/net/bridge/br_netlink.c
@@ -311,17 +311,14 @@ errout:
 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
               struct net_device *dev, u32 filter_mask)
 {
-       int err = 0;
        struct net_bridge_port *port = br_port_get_rtnl(dev);
 
        if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) &&
            !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
-               goto out;
+               return 0;
 
-       err = br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, NLM_F_MULTI,
-                            filter_mask, dev);
-out:
-       return err;
+       return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, NLM_F_MULTI,
+                             filter_mask, dev);
 }
 
 static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p,