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dmaengine: at_xdmac: fix a bug in transfer residue computation

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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: Cyrille Pitchen <cyrille.pitchen@atmel.com>
Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Cyrille Pitchen 2014-11-13 11:52:42 +01:00 committed by Vinod Koul
parent 4e0978208d
commit 57819276db
1 changed files with 3 additions and 1 deletions
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4
drivers/dma/at_xdmac.c
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@ -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;