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>

1 files changed, 5 insertions, 1 deletions

diff --git a/drivers/dma/dw_dmac.c b/drivers/dma/dw_dmac.c
index 265d43c8b359..f209ff8835e8 100644
--- 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;
 }