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s390/cio: add NULL test 

Add NULL test on call to kzalloc.

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

// <smpl>
@@
expression x;
identifier fld;
@@

* x = kzalloc(...);
  ... when != x == NULL
  x->fld
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Julia Lawall 2015-12-20 12:15:52 +01:00 committed by Martin Schwidefsky
parent 11b64c8acc
commit 8cb708f3d3
1 changed files with 2 additions and 0 deletions
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2
drivers/s390/char/con3215.c
View File

@ -922,6 +922,8 @@ static int __init con3215_init(void)
spin_lock_init(&raw3215_freelist_lock); spin_lock_init(&raw3215_freelist_lock);
for (i = 0; i < NR_3215_REQ; i++) { for (i = 0; i < NR_3215_REQ; i++) {
req = kzalloc(sizeof(struct raw3215_req), GFP_KERNEL | GFP_DMA); req = kzalloc(sizeof(struct raw3215_req), GFP_KERNEL | GFP_DMA);
if (!req)
return -ENOMEM;
req->next = raw3215_freelist; req->next = raw3215_freelist;
raw3215_freelist = req; raw3215_freelist = req;
} }