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path: root/drivers/dma/dmaengine.c
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Diffstat (limited to 'drivers/dma/dmaengine.c')
-rw-r--r--drivers/dma/dmaengine.c49
1 files changed, 28 insertions, 21 deletions
diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c
index bcf52df..2996523 100644
--- a/drivers/dma/dmaengine.c
+++ b/drivers/dma/dmaengine.c
@@ -473,20 +473,22 @@ dma_async_memcpy_buf_to_buf(struct dma_chan *chan, void *dest,
{
struct dma_device *dev = chan->device;
struct dma_async_tx_descriptor *tx;
- dma_addr_t addr;
+ dma_addr_t dma_dest, dma_src;
dma_cookie_t cookie;
int cpu;
- tx = dev->device_prep_dma_memcpy(chan, len, 0);
- if (!tx)
+ dma_src = dma_map_single(dev->dev, src, len, DMA_TO_DEVICE);
+ dma_dest = dma_map_single(dev->dev, dest, len, DMA_FROM_DEVICE);
+ tx = dev->device_prep_dma_memcpy(chan, dma_dest, dma_src, len, 0);
+
+ if (!tx) {
+ dma_unmap_single(dev->dev, dma_src, len, DMA_TO_DEVICE);
+ dma_unmap_single(dev->dev, dma_dest, len, DMA_FROM_DEVICE);
return -ENOMEM;
+ }
tx->ack = 1;
tx->callback = NULL;
- addr = dma_map_single(dev->dev, src, len, DMA_TO_DEVICE);
- tx->tx_set_src(addr, tx, 0);
- addr = dma_map_single(dev->dev, dest, len, DMA_FROM_DEVICE);
- tx->tx_set_dest(addr, tx, 0);
cookie = tx->tx_submit(tx);
cpu = get_cpu();
@@ -517,20 +519,22 @@ dma_async_memcpy_buf_to_pg(struct dma_chan *chan, struct page *page,
{
struct dma_device *dev = chan->device;
struct dma_async_tx_descriptor *tx;
- dma_addr_t addr;
+ dma_addr_t dma_dest, dma_src;
dma_cookie_t cookie;
int cpu;
- tx = dev->device_prep_dma_memcpy(chan, len, 0);
- if (!tx)
+ dma_src = dma_map_single(dev->dev, kdata, len, DMA_TO_DEVICE);
+ dma_dest = dma_map_page(dev->dev, page, offset, len, DMA_FROM_DEVICE);
+ tx = dev->device_prep_dma_memcpy(chan, dma_dest, dma_src, len, 0);
+
+ if (!tx) {
+ dma_unmap_single(dev->dev, dma_src, len, DMA_TO_DEVICE);
+ dma_unmap_page(dev->dev, dma_dest, len, DMA_FROM_DEVICE);
return -ENOMEM;
+ }
tx->ack = 1;
tx->callback = NULL;
- addr = dma_map_single(dev->dev, kdata, len, DMA_TO_DEVICE);
- tx->tx_set_src(addr, tx, 0);
- addr = dma_map_page(dev->dev, page, offset, len, DMA_FROM_DEVICE);
- tx->tx_set_dest(addr, tx, 0);
cookie = tx->tx_submit(tx);
cpu = get_cpu();
@@ -563,20 +567,23 @@ dma_async_memcpy_pg_to_pg(struct dma_chan *chan, struct page *dest_pg,
{
struct dma_device *dev = chan->device;
struct dma_async_tx_descriptor *tx;
- dma_addr_t addr;
+ dma_addr_t dma_dest, dma_src;
dma_cookie_t cookie;
int cpu;
- tx = dev->device_prep_dma_memcpy(chan, len, 0);
- if (!tx)
+ dma_src = dma_map_page(dev->dev, src_pg, src_off, len, DMA_TO_DEVICE);
+ dma_dest = dma_map_page(dev->dev, dest_pg, dest_off, len,
+ DMA_FROM_DEVICE);
+ tx = dev->device_prep_dma_memcpy(chan, dma_dest, dma_src, len, 0);
+
+ if (!tx) {
+ dma_unmap_page(dev->dev, dma_src, len, DMA_TO_DEVICE);
+ dma_unmap_page(dev->dev, dma_dest, len, DMA_FROM_DEVICE);
return -ENOMEM;
+ }
tx->ack = 1;
tx->callback = NULL;
- addr = dma_map_page(dev->dev, src_pg, src_off, len, DMA_TO_DEVICE);
- tx->tx_set_src(addr, tx, 0);
- addr = dma_map_page(dev->dev, dest_pg, dest_off, len, DMA_FROM_DEVICE);
- tx->tx_set_dest(addr, tx, 0);
cookie = tx->tx_submit(tx);
cpu = get_cpu();
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