dmaengine: fsldma: Use dma_pool_zalloc

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@lip6.fr>
Acked-by: Li Yang <leoyang.li@nxp.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

diff --git a/drivers/dma/fsldma.c b/drivers/dma/fsldma.c
index aac85c30c2cf6fc64669841c5b6abb5317df1b94..a8828ed639b3027c476fc7d82d4d6607221b2ae1 100644 (file)
--- 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;