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Commit 3ac012af authored by Jonas Aaberg's avatar Jonas Aaberg Committed by Dan Williams
Browse files

DMAENGINE: ste_dma40: don't pause/resume non-executing channels 



There is no point in pausing what isn't running.

Signed-off-by: default avatarJonas Aaberg <jonas.aberg@stericsson.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@stericsson.com>
Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
parent 8f6fd7f5

drivers/dma/ste_dma40.c

+6 −0
Original line number Original line Diff line number Diff line
@@ -768,6 +768,9 @@ static int d40_pause(struct dma_chan *chan) 
	int res = 0;

	int res = 0;

	unsigned long flags;

	unsigned long flags;





	if (!d40c->busy)

		return 0;



	spin_lock_irqsave(&d40c->lock, flags);

	spin_lock_irqsave(&d40c->lock, flags);





	res = d40_channel_execute_command(d40c, D40_DMA_SUSPEND_REQ);

	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;

	int res = 0;

	unsigned long flags;

	unsigned long flags;





	if (!d40c->busy)

		return 0;



	spin_lock_irqsave(&d40c->lock, flags);

	spin_lock_irqsave(&d40c->lock, flags);





	if (d40c->base->rev == 0)

	if (d40c->base->rev == 0)