dma: imx-sdma: start transfer in issue_pending

The DMA engine API requires that transfers are started in issue_pending
instead of tx_submit. Fix this.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
[corrected change log to DMA engine API insteadof DMA API]
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>

1 files changed, 5 insertions, 6 deletions

diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index a8af379680c1..e58dbf638cc9 100644
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -838,15 +838,12 @@ static dma_cookie_t sdma_tx_submit(struct dma_async_tx_descriptor *tx)
 {
         unsigned long flags;
         struct sdma_channel *sdmac = to_sdma_chan(tx->chan);
-        struct sdma_engine *sdma = sdmac->sdma;
         dma_cookie_t cookie;
 
         spin_lock_irqsave(&sdmac->lock, flags);
 
         cookie = sdma_assign_cookie(sdmac);
 
-        sdma_enable_channel(sdma, sdmac->channel);
-
         spin_unlock_irqrestore(&sdmac->lock, flags);
 
         return cookie;
@@ -1135,9 +1132,11 @@ static enum dma_status sdma_tx_status(struct dma_chan *chan,
 
 static void sdma_issue_pending(struct dma_chan *chan)
 {
-        /*
-         * Nothing to do. We only have a single descriptor
-         */
+        struct sdma_channel *sdmac = to_sdma_chan(chan);
+        struct sdma_engine *sdma = sdmac->sdma;
+
+        if (sdmac->status == DMA_IN_PROGRESS)
+                sdma_enable_channel(sdma, sdmac->channel);
 }
 
 #define SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V1 34