Re: [PATCH 1/3] dmaengine: pl330: Do not dereference pl330_thread pointer before non-NULL check
From: Lars-Peter Clausen
Date: Fri Sep 05 2014 - 11:29:35 EST
On 09/05/2014 05:04 PM, Krzysztof Kozlowski wrote:
Do not dereference the 'struct pl330_thread *thrd' before the check for
non-NULL value.
This fixes following warning:
drivers/dma/pl330.c:1376 pl330_submit_req() warn: variable dereferenced before check 'thrd' (see line 1367)
I think we can just drop that whole line of checks, none of them will ever
be true.
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@xxxxxxxxxxx>
---
drivers/dma/pl330.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
index d5149aacd2fe..47d82070848d 100644
--- a/drivers/dma/pl330.c
+++ b/drivers/dma/pl330.c
@@ -1364,7 +1364,7 @@ static inline u32 _prepare_ccr(const struct pl330_reqcfg *rqc)
static int pl330_submit_req(struct pl330_thread *thrd,
struct dma_pl330_desc *desc)
{
- struct pl330_dmac *pl330 = thrd->dmac;
+ struct pl330_dmac *pl330;
struct _xfer_spec xs;
unsigned long flags;
void __iomem *regs;
@@ -1376,6 +1376,7 @@ static int pl330_submit_req(struct pl330_thread *thrd,
if (!desc || !thrd || thrd->free)
return -EINVAL;
+ pl330 = thrd->dmac;
regs = thrd->dmac->base;
if (pl330->state == DYING
--
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