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Commit 57819276 authored by Cyrille Pitchen's avatar Cyrille Pitchen Committed by Vinod Koul
Browse files

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: default avatarCyrille Pitchen <cyrille.pitchen@atmel.com>
Signed-off-by: default avatarLudovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
parent 4e097820

drivers/dma/at_xdmac.c

+3 −1
Original line number Diff line number Diff line
@@ -562,6 +562,7 @@ at_xdmac_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl, 
	struct scatterlist	*sg;

	int			i;

	u32			cfg;

	unsigned int		xfer_size = 0;



	if (!sgl)

		return NULL;
@@ -637,12 +638,13 @@ at_xdmac_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl, 
		dev_dbg(chan2dev(chan), "%s: add desc 0x%p to descs_list 0x%p\n",

			 __func__, desc, first);

		list_add_tail(&desc->desc_node, &first->descs_list);

		xfer_size += len;

	}



	spin_unlock_bh(&atchan->lock);



	first->tx_dma_desc.flags = flags;

	first->xfer_size = sg_len;

	first->xfer_size = xfer_size;

	first->direction = direction;



	return &first->tx_dma_desc;