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Commit bef2a8d3 authored by Javier Martin's avatar Javier Martin Committed by Vinod Koul
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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: default avatarJavier Martin <javier.martin@vista-silicon.com>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
parent ac498987

drivers/dma/imx-dma.c

+2 −3
Original line number Diff line number Diff line
@@ -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;