dmaengine: sprd: Get transfer residue depending on the transfer direction
Add one field to save the transfer direction for struct sprd_dma_desc, which is used to get correct transfer residue depending on the transfer direction. [Baolin Wang adds one field to present the transfer direction] Signed-off-by: NEric Long <eric.long@spreadtrum.com> Signed-off-by: NBaolin Wang <baolin.wang@linaro.org> Signed-off-by: NVinod Koul <vkoul@kernel.org>
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