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authorJavier Martin <javier.martin@vista-silicon.com>2012-10-30 16:58:50 +0100
committerVinod Koul <vinod.koul@intel.com>2013-01-08 16:44:56 +0100
commitbef2a8d3f6cb91bc8743bdd63d3eb6a37bf27b12 (patch)
tree42f3b88674d7d7c836c88cd7ef0e9d352bb2cecf /drivers/dma/imx-dma.c
parentioat: Fix DMA memory sync direction correct flag (diff)
downloadlinux-bef2a8d3f6cb91bc8743bdd63d3eb6a37bf27b12.tar.xz
linux-bef2a8d3f6cb91bc8743bdd63d3eb6a37bf27b12.zip
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>
Diffstat (limited to 'drivers/dma/imx-dma.c')
-rw-r--r--drivers/dma/imx-dma.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/dma/imx-dma.c b/drivers/dma/imx-dma.c
index dbf0e6f8de8a..a7dcf78b1ff8 100644
--- a/drivers/dma/imx-dma.c
+++ b/drivers/dma/imx-dma.c
@@ -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;