dmaengine: ioatdma: 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>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

1 files changed, 2 insertions, 3 deletions

diff --git a/drivers/dma/ioat/init.c b/drivers/dma/ioat/init.c
index efdee1a69fc4..d4c63d48b970 100644
--- a/drivers/dma/ioat/init.c
+++ b/drivers/dma/ioat/init.c
@@ -690,12 +690,11 @@ static int ioat_alloc_chan_resources(struct dma_chan *c)
         /* allocate a completion writeback area */
         /* doing 2 32bit writes to mmio since 1 64b write doesn't work */
         ioat_chan->completion =
-                dma_pool_alloc(ioat_chan->ioat_dma->completion_pool,
-                               GFP_KERNEL, &ioat_chan->completion_dma);
+                dma_pool_zalloc(ioat_chan->ioat_dma->completion_pool,
+                                GFP_KERNEL, &ioat_chan->completion_dma);
         if (!ioat_chan->completion)
                 return -ENOMEM;
 
-        memset(ioat_chan->completion, 0, sizeof(*ioat_chan->completion));
         writel(((u64)ioat_chan->completion_dma) & 0x00000000FFFFFFFF,
                ioat_chan->reg_base + IOAT_CHANCMP_OFFSET_LOW);
         writel(((u64)ioat_chan->completion_dma) >> 32,