dmaengine: Use dma_zalloc_coherent

Use the zeroing function instead of dma_alloc_coherent & memset(,0,)
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

drivers/dma/imx-sdma.c

@@ -911,14 +911,13 @@ static int sdma_request_channel(struct sdma_channel *sdmac)
 	int channel = sdmac->channel;
 	int ret = -EBUSY;
 
-	sdmac->bd = dma_alloc_coherent(NULL, PAGE_SIZE, &sdmac->bd_phys, GFP_KERNEL);
+	sdmac->bd = dma_zalloc_coherent(NULL, PAGE_SIZE, &sdmac->bd_phys,
+					GFP_KERNEL);
 	if (!sdmac->bd) {
 		ret = -ENOMEM;
 		goto out;
 	}
 
-	memset(sdmac->bd, 0, PAGE_SIZE);
-
 	sdma->channel_control[channel].base_bd_ptr = sdmac->bd_phys;
 	sdma->channel_control[channel].current_bd_ptr = sdmac->bd_phys;
 

drivers/dma/mxs-dma.c

@@ -413,16 +413,14 @@ static int mxs_dma_alloc_chan_resources(struct dma_chan *chan)
 	struct mxs_dma_engine *mxs_dma = mxs_chan->mxs_dma;
 	int ret;
 
-	mxs_chan->ccw = dma_alloc_coherent(mxs_dma->dma_device.dev,
-				CCW_BLOCK_SIZE, &mxs_chan->ccw_phys,
-				GFP_KERNEL);
+	mxs_chan->ccw = dma_zalloc_coherent(mxs_dma->dma_device.dev,
+					    CCW_BLOCK_SIZE,
+					    &mxs_chan->ccw_phys, GFP_KERNEL);
 	if (!mxs_chan->ccw) {
 		ret = -ENOMEM;
 		goto err_alloc;
 	}
 
-	memset(mxs_chan->ccw, 0, CCW_BLOCK_SIZE);
-
 	if (mxs_chan->chan_irq != NO_IRQ) {
 		ret = request_irq(mxs_chan->chan_irq, mxs_dma_int_handler,
 					0, "mxs-dma", mxs_dma);