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authorJulia Lawall <julia@diku.dk>2009-10-17 08:42:49 +0200
committerBen Dooks <ben-linux@fluff.org>2009-10-28 18:25:57 +0000
commit60e5c1b5ecd99e06d3133a2a20d58d3c2b9968ac (patch)
tree84a2faad185d03646999895ed4d074c7ada03fd7
parentd3bf3956c75b38def079fb6db40b5cf3f1466a93 (diff)
ARM: S3C24XX: arch/arm/plat-s3c24xx: Move dereference after NULL test
If the NULL test on buf is needed, then the dereference should be after the NULL test. A simplified version of the semantic match that detects this problem is as follows (http://coccinelle.lip6.fr/): // <smpl> @match exists@ expression x, E; identifier fld; @@ * x->fld ... when != \(x = E\|&x\) * x == NULL // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
-rw-r--r--arch/arm/plat-s3c24xx/dma.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/arm/plat-s3c24xx/dma.c b/arch/arm/plat-s3c24xx/dma.c
index 196b191..f046f8c 100644
--- a/arch/arm/plat-s3c24xx/dma.c
+++ b/arch/arm/plat-s3c24xx/dma.c
@@ -208,14 +208,14 @@ s3c2410_dma_loadbuffer(struct s3c2410_dma_chan *chan,
{
unsigned long reload;
- pr_debug("s3c2410_chan_loadbuffer: loading buff %p (0x%08lx,0x%06x)\n",
- buf, (unsigned long)buf->data, buf->size);
-
if (buf == NULL) {
dmawarn("buffer is NULL\n");
return -EINVAL;
}
+ pr_debug("s3c2410_chan_loadbuffer: loading buff %p (0x%08lx,0x%06x)\n",
+ buf, (unsigned long)buf->data, buf->size);
+
/* check the state of the channel before we do anything */
if (chan->load_state == S3C2410_DMALOAD_1LOADED) {