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dma: coh901318: set residue only if dma is in progress

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When status is DMA_SUCCESS the residue should be zero. Otherwise it's a bug.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Andy Shevchenko 2013-02-14 11:00:18 +02:00 committed by Vinod Koul
parent 4168d0d9d3
commit 9b562639a1
1 changed files with 3 additions and 1 deletions
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4
drivers/dma/coh901318.c
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@ -1147,7 +1147,9 @@ coh901318_tx_status(struct dma_chan *chan, dma_cookie_t cookie,
enum dma_status ret;
ret = dma_cookie_status(chan, cookie, txstate);
/* FIXME: should be conditional on ret != DMA_SUCCESS? */
if (ret == DMA_SUCCESS)
return ret;
dma_set_residue(txstate, coh901318_get_bytes_left(chan));
if (ret == DMA_IN_PROGRESS && cohc->stopped)