From: Julia Lawall <julia@diku.dk>
Date: Thu, 17 Apr 2008 04:09:25 +0000 (-0700)
Subject: RDMA/iwcm: Test rdma_create_id() for IS_ERR rather than 0
X-Git-Tag: v2.6.26-rc1~1156^2~55
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=10f32065a25d22bf7894fa39ff2ce8492922086a;p=pandora-kernel.git

RDMA/iwcm: Test rdma_create_id() for IS_ERR rather than 0

The function rdma_create_id() always returns either a valid pointer or
a value made with ERR_PTR, so its result should be tested with IS_ERR,
not with a test for 0.

The problem was found using the following semantic match.
(http://www.emn.fr/x-info/coccinelle/)

//<smpl>
@a@
expression E, E1;
statement S,S1;
position p;
@@

E = rdma_create_id(...)
... when != E = E1
if@p (E) S else S1

@n@
position a.p;
expression E,E1;
statement S,S1;
@@

E = NULL
... when != E = E1
if@p (E) S else S1

@depends on !n@
expression E;
statement S,S1;
position a.p;
@@

* if@p (E)
  S else S1
//</smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
---

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