The pl330_submit_req() checked supplied 'struct pl330_thread thrd' and 'struct dma_pl330_desc desc' parameters for non-NULL. However these checks are useless because supplied arguments won't be NULL. The pl330_submit_req() is called in only one place and: 1. 'desc' is already dereferenced in fill_queue() before calling pl330_submit_req(). 2. 'thrd' is always dereferenced after calling fill_queue()->pl330_submit_req(). Removing the checks for non-NULL values fixes following warning: drivers/dma/pl330.c:1376 pl330_submit_req() warn: variable dereferenced before check 'thrd' (see line 1367) Signed-off-by: Krzysztof Kozlowski <k.kozlowski@xxxxxxxxxxx> --- Changes since v1: ================= 1. Remove the checks for non-NULL completely instead of moving them before dereference. Suggested by Lars-Peter Clausen. --- drivers/dma/pl330.c | 4 ---- 1 file changed, 4 deletions(-) diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c index d5149aacd2fe..57049f84d0c0 100644 --- a/drivers/dma/pl330.c +++ b/drivers/dma/pl330.c @@ -1372,10 +1372,6 @@ static int pl330_submit_req(struct pl330_thread *thrd, u32 ccr; int ret = 0; - /* No Req or Unacquired Channel or DMAC */ - if (!desc || !thrd || thrd->free) - return -EINVAL; - regs = thrd->dmac->base; if (pl330->state == DYING -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe dmaengine" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
