lkml.org 
[lkml]   [2008]   [Aug]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] net/rxrpc: Use an IS_ERR test rather than a NULL test
Date
From: Julien Brunel <brunel@diku.dk>

In case of error, the function rxrpc_get_transport returns an ERR
pointer, but never returns a NULL pointer. So after a call to this
function, a NULL test should be replaced by an IS_ERR test.

A simplified version of the semantic patch that makes this change is
as follows:
(http://www.emn.fr/x-info/coccinelle/)

// <smpl>
@correct_null_test@
expression x,E;
statement S1, S2;
@@
x = rxrpc_get_transport(...)
<... when != x = E
if (
(
- x@p2 != NULL
+ ! IS_ERR ( x )
|
- x@p2 == NULL
+ IS_ERR( x )
)
)
S1
else S2
...>
? x = E;
// </smpl>

Signed-off-by: Julien Brunel <brunel@diku.dk>
Signed-off-by: Julia Lawall <julia@diku.dk>

---
net/rxrpc/ar-accept.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff -u -p a/net/rxrpc/ar-accept.c b/net/rxrpc/ar-accept.c
--- a/net/rxrpc/ar-accept.c
+++ b/net/rxrpc/ar-accept.c
@@ -100,7 +100,7 @@ static int rxrpc_accept_incoming_call(st

trans = rxrpc_get_transport(local, peer, GFP_NOIO);
rxrpc_put_peer(peer);
- if (!trans) {
+ if (IS_ERR(trans)) {
_debug("no trans");
ret = -EBUSY;
goto error;

\
 
 \ /
  Last update: 2008-08-08 13:57    [W:0.039 / U:0.468 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site