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DMAENGINE: ste_dma40: don't pause/resume non-executing channels
There is no point in pausing what isn't running. Signed-off-by: Jonas Aaberg <jonas.aberg@stericsson.com> Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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1 changed files with 6 additions and 0 deletions
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@ -768,6 +768,9 @@ static int d40_pause(struct dma_chan *chan)
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int res = 0;
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unsigned long flags;
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if (!d40c->busy)
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return 0;
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spin_lock_irqsave(&d40c->lock, flags);
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res = d40_channel_execute_command(d40c, D40_DMA_SUSPEND_REQ);
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@ -792,6 +795,9 @@ static int d40_resume(struct dma_chan *chan)
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int res = 0;
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unsigned long flags;
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if (!d40c->busy)
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return 0;
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spin_lock_irqsave(&d40c->lock, flags);
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if (d40c->base->rev == 0)
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