Dma_pool_zalloc combines dma_pool_alloc and memset 0. The semantic patch that makes this transformation is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ expression d,e; statement S; @@ d = - dma_pool_alloc + dma_pool_zalloc (...); if (!d) S - memset(d, 0, sizeof(*d)); // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@xxxxxxx> --- drivers/dma/mmp_pdma.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/dma/mmp_pdma.c b/drivers/dma/mmp_pdma.c index e39457f..56f1fd6 100644 --- a/drivers/dma/mmp_pdma.c +++ b/drivers/dma/mmp_pdma.c @@ -364,13 +364,12 @@ mmp_pdma_alloc_descriptor(struct mmp_pdma_chan *chan) struct mmp_pdma_desc_sw *desc; dma_addr_t pdesc; - desc = dma_pool_alloc(chan->desc_pool, GFP_ATOMIC, &pdesc); + desc = dma_pool_zalloc(chan->desc_pool, GFP_ATOMIC, &pdesc); if (!desc) { dev_err(chan->dev, "out of memory for link descriptor\n"); return NULL; } - memset(desc, 0, sizeof(*desc)); INIT_LIST_HEAD(&desc->tx_list); dma_async_tx_descriptor_init(&desc->async_tx, &chan->chan); /* each desc has submit */ -- 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
