dmaengine: at_xdmac: fix a bug in transfer residue computation
The total size of the transfer was wrong in at_xdmac_prep_slave_sg() resulting in bad computation of the transfer residue by at_xdmac_tx_status(). Signed-off-by: NCyrille Pitchen <cyrille.pitchen@atmel.com> Signed-off-by: NLudovic Desroches <ludovic.desroches@atmel.com> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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