From a86ee03ce6f279ebe581a7a8c0c4393eaeb789ee Mon Sep 17 00:00:00 2001 From: Ira Snyder Date: Thu, 30 Sep 2010 11:46:44 +0000 Subject: 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 Signed-off-by: Dan Williams --- drivers/dma/dmaengine.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers') diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c index 9d31d5eb95c..db403b8ccab 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) && -- cgit v1.2.3-70-g09d2