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authorJulia Lawall <julia@diku.dk>2009-07-13 22:43:41 +0200
committerTejun Heo <tj@kernel.org>2009-07-17 15:29:58 +0900
commit8f47428704c2fd6f787a6f340071b9c338b65803 (patch)
tree15318bc754cabdda0752ae69193415e5868a5674
parent0a09f4319c6d88c732ed46735f8584bbb95cac65 (diff)
ataflop: adjust NULL test
dtp is derefenced on the lines above the test !dtp, and so it cannot be NULL at this point. A simplified version of the semantic match that finds this problem is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @r@ expression x,E,E1; identifier f,l; position p1,p2; @@ *x@p1->f = E1; ... when != x = E when != goto l; ( *x@p2 == NULL | *x@p2 != NULL ) // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: Tejun Heo <tj@kernel.org>
-rw-r--r--drivers/block/ataflop.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/block/ataflop.c b/drivers/block/ataflop.c
index f5e7180..3ff0294 100644
--- a/drivers/block/ataflop.c
+++ b/drivers/block/ataflop.c
@@ -1627,7 +1627,7 @@ static int fd_ioctl(struct block_device *bdev, fmode_t mode,
drive, dtp->blocks, dtp->spt, dtp->stretch);
/* sanity check */
- if (!dtp || setprm.track != dtp->blocks/dtp->spt/2 ||
+ if (setprm.track != dtp->blocks/dtp->spt/2 ||
setprm.head != 2) {
redo_fd_request();
return -EINVAL;