dmaengine: at_xdmac: fix residue corruption

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An unexpected value of CUBC can lead to a corrupted residue. A more
complex sequence is needed to detect an inaccurate value for NCA or CUBC.

Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Fixes: e1f7c9eee7 ("dmaengine: at_xdmac: creation of the atmel
eXtended DMA Controller driver")
Cc: stable@vger.kernel.org #v4.1 and later
Reviewed-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

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Ludovic Desroches 2016-05-12 16:54:09 +02:00 • committed by Vinod Koul

parent 4a9723e8df

commit 53398f4888

1 changed files with 32 additions and 22 deletions

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drivers/dma/at_xdmac.c

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