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.law...@lip6.fr>
---
drivers/dma/fsldma.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/dma/fsldma.c b/drivers/dma/fsldma.c
index aac85c3..a8828ed 100644
--- a/drivers/dma/fsldma.c
+++ b/drivers/dma/fsldma.c
@@ -462,13 +462,12 @@ static struct fsl_desc_sw
*fsl_dma_alloc_descriptor(struct fsldma_chan *chan)
struct fsl_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) {
chan_dbg(chan, "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->common);
desc->async_tx.tx_submit = fsl_dma_tx_submit;
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