DMA: PL330: allow submitting 2 requests at a time

Fix the logic to allow mc programming of second transfer after first
has been done, by removing immediate return upon success and iterating
until we detect QFull or DMAC dying.

Reported-by: Alvaro Moran <dirac3000@gmail.com>
Tested-by: Alvaro Moran <dirac3000@gmail.com>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
index 5dbc594..31619c0 100644 (file)
--- a/drivers/dma/pl330.c
+++ b/drivers/dma/pl330.c
@@ -2288,13 +2288,12 @@ static inline void fill_queue(struct dma_pl330_chan *pch)
 
                /* If already submitted */
                if (desc->status == BUSY)
-                       break;
+                       continue;
 
                ret = pl330_submit_req(pch->pl330_chid,
                                                &desc->req);
                if (!ret) {
                        desc->status = BUSY;
-                       break;
                } else if (ret == -EAGAIN) {
                        /* QFull or DMAC Dying */
                        break;