[PATCH 1/5] dmaengine: mmp_pdma: Use dma_pool_zalloc

[Julia Lawall]

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/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 */