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| author | Ira Snyder <iws@ovro.caltech.edu> | 2010-09-30 11:46:44 +0000 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2010-10-07 14:41:40 -0700 |
| commit | a86ee03ce6f279ebe581a7a8c0c4393eaeb789ee (patch) | |
| tree | e662a6492370232e008d405e4ed7bfa4be0aea2e /drivers/dma/dmaengine.c | |
| parent | cc60f8878eab892c03d06b10f389232b9b66bd83 (diff) | |
| download | op-kernel-dev-a86ee03ce6f279ebe581a7a8c0c4393eaeb789ee.zip op-kernel-dev-a86ee03ce6f279ebe581a7a8c0c4393eaeb789ee.tar.gz | |
dma: add support for scatterlist to scatterlist copy
This adds support for scatterlist to scatterlist DMA transfers. A
similar interface is exposed by the fsldma driver (through the DMA_SLAVE
API) and by the ste_dma40 driver (through an exported function).
This patch paves the way for making this type of copy operation a part
of the generic DMAEngine API. Futher patches will add support in
individual drivers.
Signed-off-by: Ira W. Snyder <iws@ovro.caltech.edu>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/dma/dmaengine.c')
| -rw-r--r-- | drivers/dma/dmaengine.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c index 9d31d5e..db403b8 100644 --- a/drivers/dma/dmaengine.c +++ b/drivers/dma/dmaengine.c @@ -690,6 +690,8 @@ int dma_async_device_register(struct dma_device *device) !device->device_prep_dma_memset); BUG_ON(dma_has_cap(DMA_INTERRUPT, device->cap_mask) && !device->device_prep_dma_interrupt); + BUG_ON(dma_has_cap(DMA_SG, device->cap_mask) && + !device->device_prep_dma_sg); BUG_ON(dma_has_cap(DMA_SLAVE, device->cap_mask) && !device->device_prep_slave_sg); BUG_ON(dma_has_cap(DMA_SLAVE, device->cap_mask) && |
