dmaengine: at_xdmac: fix residue corruption

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commit 53398f4888 upstream.

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")
Reviewed-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Ludovic Desroches 2016-05-12 16:54:09 +02:00 • committed by Greg Kroah-Hartman

parent 1b60fcdcf9

commit 5ce7333f41

1 changed files with 32 additions and 22 deletions

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drivers/dma/at_xdmac.c

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