dma: dw: 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>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

diff --git a/drivers/dma/dw/core.c b/drivers/dma/dw/core.c
index 6932645..5f2ee5f 100644 (file)
--- a/drivers/dma/dw/core.c
+++ b/drivers/dma/dw/core.c
@@ -1098,12 +1098,12 @@ dwc_tx_status(struct dma_chan *chan,
        enum dma_status         ret;
 
        ret = dma_cookie_status(chan, cookie, txstate);
-       if (ret != DMA_SUCCESS) {
-               dwc_scan_descriptors(to_dw_dma(chan->device), dwc);
+       if (ret == DMA_SUCCESS)
+               return ret;
 
-               ret = dma_cookie_status(chan, cookie, txstate);
-       }
+       dwc_scan_descriptors(to_dw_dma(chan->device), dwc);
 
+       ret = dma_cookie_status(chan, cookie, txstate);
        if (ret != DMA_SUCCESS)
                dma_set_residue(txstate, dwc_get_residue(dwc));