From: Julia Lawall <julia@diku.dk>
Date: Wed, 11 Aug 2010 10:11:24 +0000 (+0200)
Subject: [SCSI] drivers/message/fusion: Return -ENOMEM on memory allocation failure
X-Git-Tag: v2.6.37~539^2~66
X-Git-Url: https://rtime.felk.cvut.cz/gitweb/mcf548x/linux.git/commitdiff_plain/1c1acab0367d88ad5da2b9db2efdf2699113ec88

[SCSI] drivers/message/fusion: Return -ENOMEM on memory allocation failure

In this code, 0 is returned on memory allocation failure, even though other
failures return -ENOMEM or other similar values.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@@
expression ret;
expression x,e1,e2,e3;
@@

ret = 0
... when != ret = e1
*x = \(kmalloc\|kcalloc\|kzalloc\)(...)
... when != ret = e2
if (x == NULL) { ... when != ret = e3
  return ret;
}
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Acked-by: "Desai, Kashyap" <Kashyap.Desai@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
---

diff --git a/drivers/message/fusion/mptbase.c b/drivers/message/fusion/mptbase.c
index 6837a8ef9371..3e57b61ca446 100644
--- a/drivers/message/fusion/mptbase.c
+++ b/drivers/message/fusion/mptbase.c
@@ -5945,8 +5945,10 @@ mpt_findImVolumes(MPT_ADAPTER *ioc)
 		goto out;
 
 	mem = kmalloc(iocpage2sz, GFP_KERNEL);
-	if (!mem)
+	if (!mem) {
+		rc = -ENOMEM;
 		goto out;
+	}
 
 	memcpy(mem, (u8 *)pIoc2, iocpage2sz);
 	ioc->raid_data.pIocPg2 = (IOCPage2_t *) mem;