dmaengine: stm32-dma: Fix residue computation issue in cyclic mode
This patch resolves the residue computation issue detected in cyclic mode. Now, in cyclic mode, we increment next_sg variable as soon as a period is transferred instead of after pushing a new sg request. Then, we take into account that after transferring a complete buffer, the next_sg variable is equal to 0. Signed-off-by: M'boumba Cedric Madianga <cedric.madianga@gmail.com> Reviewed-by: Ludovic BARRE <ludovic.barre@st.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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