From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Mon, 15 Jul 2013 12:04:40 +0000 (+0300)
Subject: dma: dw: return DMA_SUCCESS immediately from device_tx_status()
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=12381dc0c764ecd1703adc6d23c869006223dab8;p=linux-beck.git

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 6932645ca1f8..5f2ee5ff8fa4 100644
--- 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));