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txx9dmac: 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>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Andy Shevchenko 2013-05-27 15:14:42 +03:00 committed by Vinod Koul
parent c14d2bc470
commit 985a0cb970
1 changed files with 6 additions and 7 deletions
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13
drivers/dma/txx9dmac.c
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@ -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,