[PATCH 12/12] txx9dmac: return DMA_SUCCESS immediately from device_tx_status()

[Andy Shevchenko]

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@xxxxxxxxxxxxxxx>
---
 drivers/dma/txx9dmac.c | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/drivers/dma/txx9dmac.c b/drivers/dma/txx9dmac.c
index a59fb48..59357db 100644
--- 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,
-- 
1.8.2.rc0.22.gb3600c3

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