[PATCH] dmaengine: pl330: get transfer count for BUSY descriptor in list

[Hsin-Yu Chao]

A descrptor of status BUSY could stay in pending list with non-zero
number of transferred count. In this case we should query the actual
transfered count or the total residual will be wrong and cause
unexpected hw_ptr move.

Signed-off-by: Hsin-Yu Chao <hychao@xxxxxxxxxxxx>
---
 drivers/dma/pl330.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
index 4fc3ffb..39230d9 100644
--- a/drivers/dma/pl330.c
+++ b/drivers/dma/pl330.c
@@ -2295,7 +2295,7 @@ pl330_tx_status(struct dma_chan *chan, dma_cookie_t cookie,
 	list_for_each_entry(desc, &pch->work_list, node) {
 		if (desc->status == DONE)
 			transferred = desc->bytes_requested;
-		else if (running && desc == running)
+		else if ((running && desc == running) || (desc->status == BUSY))
 			transferred =
 				pl330_get_current_xferred_count(pch, desc);
 		else
-- 
2.6.6