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dmaengine: edma: Remove alignment constraint for memcpy

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Despite the claim by the original commit adding the memcpy
support, eDMA does not have constraint on the alignment of src, dst
or length in increment mode.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Peter Ujfalusi 2015-10-16 10:17:59 +03:00 committed by Vinod Koul
parent e4e886c6b1
commit 21a31846a7
1 changed files with 6 additions and 7 deletions
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13
drivers/dma/edma.c
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@ -1324,6 +1324,7 @@ static struct dma_async_tx_descriptor *edma_prep_dma_memcpy(
struct edma_desc *edesc;
struct device *dev = chan->device->dev;
struct edma_chan *echan = to_edma_chan(chan);
unsigned int width;
if (unlikely(!echan || !len))
return NULL;
@ -1336,8 +1337,12 @@ static struct dma_async_tx_descriptor *edma_prep_dma_memcpy(
edesc->pset_nr = 1;
width = 1 << __ffs((src | dest | len));
if (width > DMA_SLAVE_BUSWIDTH_64_BYTES)
width = DMA_SLAVE_BUSWIDTH_64_BYTES;
ret = edma_config_pset(chan, &edesc->pset[0], src, dest, 1,
DMA_SLAVE_BUSWIDTH_4_BYTES, len, DMA_MEM_TO_MEM);
width, len, DMA_MEM_TO_MEM);
if (ret < 0)
return NULL;
@ -1903,12 +1908,6 @@ static void edma_dma_init(struct edma_cc *ecc, struct dma_device *dma,
dma->dev = dev;
/*
* code using dma memcpy must make sure alignment of
* length is at dma->copy_align boundary.
*/
dma->copy_align = DMAENGINE_ALIGN_4_BYTES;
INIT_LIST_HEAD(&dma->channels);
}