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>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
index c9f485e3baeb..05d0a9937617 100644
--- a/drivers/dma/ste_dma40.c
+++ b/drivers/dma/ste_dma40.c
@@ -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)