dmaengine/dw_dmac: set residue as total len in dwc_tx_status if status is !DMA_SUCCESS

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

Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

diff --git a/drivers/dma/dw_dmac.c b/drivers/dma/dw_dmac.c
index 265d43c8b35934279f87a03392459749f63dbbfb..f209ff8835e81f4bdea6a8637d309c22dcc1dae1 100644 (file)
--- a/drivers/dma/dw_dmac.c
+++ b/drivers/dma/dw_dmac.c
@@ -860,7 +860,11 @@ 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;
 }