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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>
This commit is contained in:
Joe Perches 2014-06-15 13:37:35 -07:00 committed by Vinod Koul
parent 89751d0a2a
commit 9f92d2232d
2 changed files with 5 additions and 8 deletions
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5
drivers/dma/imx-sdma.c
View File

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

8
drivers/dma/mxs-dma.c
View File

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