diff options
Diffstat (limited to 'drivers/dma/mxs-dma.c')
| -rw-r--r-- | drivers/dma/mxs-dma.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/drivers/dma/mxs-dma.c b/drivers/dma/mxs-dma.c index 734a4eb84d65..9f02e794b12b 100644 --- a/drivers/dma/mxs-dma.c +++ b/drivers/dma/mxs-dma.c @@ -101,7 +101,8 @@ struct mxs_dma_ccw { u32 pio_words[MXS_PIO_WORDS]; }; -#define NUM_CCW (int)(PAGE_SIZE / sizeof(struct mxs_dma_ccw)) +#define CCW_BLOCK_SIZE (4 * PAGE_SIZE) +#define NUM_CCW (int)(CCW_BLOCK_SIZE / sizeof(struct mxs_dma_ccw)) struct mxs_dma_chan { struct mxs_dma_engine *mxs_dma; @@ -354,14 +355,15 @@ static int mxs_dma_alloc_chan_resources(struct dma_chan *chan) mxs_chan->chan_irq = data->chan_irq; - mxs_chan->ccw = dma_alloc_coherent(mxs_dma->dma_device.dev, PAGE_SIZE, - &mxs_chan->ccw_phys, GFP_KERNEL); + mxs_chan->ccw = dma_alloc_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, PAGE_SIZE); + 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, @@ -387,7 +389,7 @@ static int mxs_dma_alloc_chan_resources(struct dma_chan *chan) err_clk: free_irq(mxs_chan->chan_irq, mxs_dma); err_irq: - dma_free_coherent(mxs_dma->dma_device.dev, PAGE_SIZE, + dma_free_coherent(mxs_dma->dma_device.dev, CCW_BLOCK_SIZE, mxs_chan->ccw, mxs_chan->ccw_phys); err_alloc: return ret; @@ -402,7 +404,7 @@ static void mxs_dma_free_chan_resources(struct dma_chan *chan) free_irq(mxs_chan->chan_irq, mxs_dma); - dma_free_coherent(mxs_dma->dma_device.dev, PAGE_SIZE, + dma_free_coherent(mxs_dma->dma_device.dev, CCW_BLOCK_SIZE, mxs_chan->ccw, mxs_chan->ccw_phys); clk_disable_unprepare(mxs_dma->clk); |