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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>
This commit is contained in:
Jonas Aaberg 2010-08-09 12:09:12 +00:00 committed by Dan Williams
parent 8f6fd7f50f
commit 3ac012af3b
1 changed files with 6 additions and 0 deletions
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6
drivers/dma/ste_dma40.c
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@ -768,6 +768,9 @@ static int d40_pause(struct dma_chan *chan)
int res = 0;
unsigned long flags;
if (!d40c->busy)
return 0;
spin_lock_irqsave(&d40c->lock, flags);
res = d40_channel_execute_command(d40c, D40_DMA_SUSPEND_REQ);
@ -792,6 +795,9 @@ static int d40_resume(struct dma_chan *chan)
int res = 0;
unsigned long flags;
if (!d40c->busy)
return 0;
spin_lock_irqsave(&d40c->lock, flags);
if (d40c->base->rev == 0)