txx9dmac: return DMA_SUCCESS immediately from device_tx_status()

There is no point to go throught the rest of the function if first call to
dma_cookie_status() returned DMA_SUCCESS.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

diff --git a/drivers/dma/txx9dmac.c b/drivers/dma/txx9dmac.c
index a59fb4841d4c18283eae911c076c43dc042f0748..59357db62359a96c298e4743ed27d00e74849d9c 100644 (file)
--- a/drivers/dma/txx9dmac.c
+++ b/drivers/dma/txx9dmac.c
@@ -962,15 +962,14 @@ txx9dmac_tx_status(struct dma_chan *chan, dma_cookie_t cookie,
        enum dma_status ret;
 
        ret = dma_cookie_status(chan, cookie, txstate);
-       if (ret != DMA_SUCCESS) {
-               spin_lock_bh(&dc->lock);
-               txx9dmac_scan_descriptors(dc);
-               spin_unlock_bh(&dc->lock);
+       if (ret == DMA_SUCCESS)
+               return DMA_SUCCESS;
 
-               ret = dma_cookie_status(chan, cookie, txstate);
-       }
+       spin_lock_bh(&dc->lock);
+       txx9dmac_scan_descriptors(dc);
+       spin_unlock_bh(&dc->lock);
 
-       return ret;
+       return dma_cookie_status(chan, cookie, txstate);
 }
 
 static void txx9dmac_chain_dynamic(struct txx9dmac_chan *dc,