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dmaengine: at_hdmac: set residue as total len in atc_tx_status

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If transfer status is !=DMA_SUCCESS, return total transfer len as residue,
instead of zero.

Idea from dw_dmac patch by Viresh Kumar.

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Nicolas Ferre 2011-05-06 19:56:51 +02:00 committed by Vinod Koul
parent 711b9cea92
commit 543aabc7d2
1 changed files with 6 additions and 1 deletions
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7
drivers/dma/at_hdmac.c
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@ -1026,7 +1026,12 @@ atc_tx_status(struct dma_chan *chan,
spin_unlock_bh(&atchan->lock);
dma_set_tx_state(txstate, last_complete, last_used, 0);
if (ret != DMA_SUCCESS)
dma_set_tx_state(txstate, last_complete, last_used,
atc_first_active(atchan)->len);
else
dma_set_tx_state(txstate, last_complete, last_used, 0);
dev_vdbg(chan2dev(chan), "tx_status: %d (d%d, u%d)\n",
cookie, last_complete ? last_complete : 0,
last_used ? last_used : 0);