dmaengine: sun6i-dma: Only calculate residue if state exists.

There is no point in calculating the residue if state does not exist to store the value. Signed-off-by: Peter Griffin <[email protected]> Signed-off-by: Vinod Koul <[email protected]>
chewitt · Jun 21, 2016 · b9ab9d1 · b9ab9d1
1 parent a90e56e
commit b9ab9d1
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/drivers/dma/sun6i-dma.c b/drivers/dma/sun6i-dma.c
@@ -865,7 +865,7 @@ static enum dma_status sun6i_dma_tx_status(struct dma_chan *chan,
 	size_t bytes = 0;
 
 	ret = dma_cookie_status(chan, cookie, state);
-	if (ret == DMA_COMPLETE)
+	if (ret == DMA_COMPLETE || !state)
 		return ret;
 
 	spin_lock_irqsave(&vchan->vc.lock, flags);