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* [patch] bridge: simplify br_getlink() a bit
@ 2015-01-21  9:22 Dan Carpenter
  2015-01-21 20:02 ` Stephen Hemminger
  2015-01-26  7:33 ` David Miller
  0 siblings, 2 replies; 3+ messages in thread
From: Dan Carpenter @ 2015-01-21  9:22 UTC (permalink / raw)
  To: Stephen Hemminger; +Cc: netdev, bridge, kernel-janitors, David S. Miller

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>

diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c
index 528cf27..3875ea51 100644
--- 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,

^ permalink raw reply related	[flat|nested] 3+ messages in thread

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2015-01-21  9:22 [patch] bridge: simplify br_getlink() a bit Dan Carpenter
2015-01-21 20:02 ` Stephen Hemminger
2015-01-26  7:33 ` David Miller

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