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dma: dw: return DMA_SUCCESS immediately from device_tx_status()

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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>
This commit is contained in:
Andy Shevchenko 2013-07-15 15:04:40 +03:00 committed by Vinod Koul
parent 3783cef876
commit 12381dc0c7
1 changed files with 4 additions and 4 deletions
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8
drivers/dma/dw/core.c
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@ -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));