dmaengine: dma-jz4780: Add missing residue DTC mask

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The 'dtc' word in jz DMA descriptors contains two fields: The
lowest 24 bits are the transfer count, and upper 8 bits are the DOA
offset to next descriptor. The upper 8 bits are now correctly masked
off when computing residue in jz4780_dma_desc_residue(). Note that
reads of the DTCn hardware reg are automatically masked this way.

Signed-off-by: Daniel Silsby <dansilsby@gmail.com>
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Tested-by: Mathieu Malaterre <malat@debian.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>

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Daniel Silsby 2018-08-29 23:32:53 +02:00 • committed by Vinod Koul

parent 17a8e30e9d

commit 5a6187d70f

1 changed files with 2 additions and 1 deletions

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drivers/dma/dma-jz4780.c

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