dmaengine: imx-sdma - update the residue calculation for cyclic channels

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The calculation of the DMA transaction residue supports only fixed
size data transfers. This implementation is not covering all
operations (e.g. data receiving) when we need to know the exact amount
of bytes transferred.

The loop channels handling was changed to clear the buffer
descriptor errors and use the bd->mode.count to calculate the
residue.

Tested-by: Peter Senna Tschudin <peter.senna@collabora.com>
Acked-by: Peter Senna Tschudin <peter.senna@collabora.com>
Reviewed-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Nandor Han <nandor.han@ge.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Nandor Han 2016-08-08 15:38:26 +03:00 • committed by Greg Kroah-Hartman

parent 15f30f5131

commit 5881826ded

1 changed files with 18 additions and 2 deletions

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drivers/dma/imx-sdma.c

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