netdev - [PATCH 8/16] net/ax25: Use available error codes

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Message-ID: <Pine.LNX.4.64.1008161826390.19313@ask.diku.dk>
Date:	Mon, 16 Aug 2010 18:26:57 +0200 (CEST)
From:	Julia Lawall <julia@...u.dk>
To:	Ralf Baechle <ralf@...ux-mips.org>,
	"David S. Miller" <davem@...emloft.net>,
	linux-hams@...r.kernel.org, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: [PATCH 8/16] net/ax25: Use available error codes

From: Julia Lawall <julia@...u.dk>

Error codes are stored in err, but the return value is always 0.  Return
err instead.

The semantic match that finds this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@r@
local idexpression x;
constant C;
@@

if (...) { ...
  x = -C
  ... when != x
(
  return <+...x...+>;
|
  return NULL;
|
  return;
|
* return ...;
)
}
// </smpl>

Signed-off-by: Julia Lawall <julia@...u.dk>

---
This changes the semantics and has not been tested.

 net/ax25/ax25_route.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/ax25/ax25_route.c b/net/ax25/ax25_route.c
index 7805945..a169084 100644
--- a/net/ax25/ax25_route.c
+++ b/net/ax25/ax25_route.c
@@ -412,7 +412,7 @@ int ax25_rt_autobind(ax25_cb *ax25, ax25_address *addr)
 {
 	ax25_uid_assoc *user;
 	ax25_route *ax25_rt;
-	int err;
+	int err = 0;
 
 	if ((ax25_rt = ax25_get_route(addr, NULL)) == NULL)
 		return -EHOSTUNREACH;
@@ -453,7 +453,7 @@ int ax25_rt_autobind(ax25_cb *ax25, ax25_address *addr)
 put:
 	ax25_put_route(ax25_rt);
 
-	return 0;
+	return err;
 }
 
 struct sk_buff *ax25_rt_build_path(struct sk_buff *skb, ax25_address *src,
--
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