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 5dbc5946c4c3d9931585ac2440f64274f477fe02..31619c08a760ce24df5c3c4126472fb7fc47d69c 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;