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Subject[PATCH 5/6] dmaengine/dw_dmac: set residue as total len in dwc_tx_status if status is !DMA_SUCCESS
Date
If transfer status is !=DMA_SUCCESS, return total transfer len as residue,
instead of zero.

Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
---
drivers/dma/dw_dmac.c | 6 +++++-
1 files changed, 5 insertions(+), 1 deletions(-)
diff --git a/drivers/dma/dw_dmac.c b/drivers/dma/dw_dmac.c
index 9d8ed35..92f4cb0 100644
--- a/drivers/dma/dw_dmac.c
+++ b/drivers/dma/dw_dmac.c
@@ -870,7 +870,11 @@ dwc_tx_status(struct dma_chan *chan,
ret = dma_async_is_complete(cookie, last_complete, last_used);
}

- dma_set_tx_state(txstate, last_complete, last_used, 0);
+ if (ret != DMA_SUCCESS)
+ dma_set_tx_state(txstate, last_complete, last_used,
+ dwc_first_active(dwc)->len);
+ else
+ dma_set_tx_state(txstate, last_complete, last_used, 0);

return ret;
}
--
1.7.2.2


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