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dmaengine: imx-dma: Disable use of hw_chain to fix sg_dma transfers. 

HW chaining is currently broken in imx-dma. It can be easily reproduced doing
intensive accesses to a external MMC card and checking how the file system
is corrupted.

Preventing the driver to use HW chaining solves these issues.

Signed-off-by: Javier Martin <javier.martin@vista-silicon.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Javier Martin 2012-10-30 15:58:50 +00:00 committed by Vinod Koul
parent ac4989874a
commit bef2a8d3f6
1 changed files with 2 additions and 3 deletions
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5
drivers/dma/imx-dma.c
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@ -684,9 +684,8 @@ static int imxdma_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
break;
}
imxdmac->hw_chaining = 1;
if (!imxdma_hw_chain(imxdmac))
return -EINVAL;
imxdmac->hw_chaining = 0;
imxdmac->ccr_from_device = (mode | IMX_DMA_TYPE_FIFO) |
((IMX_DMA_MEMSIZE_32 | IMX_DMA_TYPE_LINEAR) << 2) |
CCR_REN;