dmaengine: ste_dma40: fix pm runtime ref counting

The pm runtime reference counting of the driver is broken for the case when there is more than one transfer queued, leading to the device being runtime suspend while active. Fix it. Signed-off-by: Rabin Vincent <[email protected]> Acked-by: Linus Walleij <[email protected]> Cc: [email protected] Signed-off-by: Vinod Koul <[email protected]>
ambv · May 27, 2013 · 9ecb41b · 9ecb41b
1 parent e4aa937
commit 9ecb41b
Showing 1 changed file with 5 additions and 3 deletions.
diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
@@ -1566,10 +1566,12 @@ static void dma_tc_handle(struct d40_chan *d40c)
 			return;
 		}
 
-		if (d40_queue_start(d40c) == NULL)
+		if (d40_queue_start(d40c) == NULL) {
 			d40c->busy = false;
-		pm_runtime_mark_last_busy(d40c->base->dev);
-		pm_runtime_put_autosuspend(d40c->base->dev);
+
+			pm_runtime_mark_last_busy(d40c->base->dev);
+			pm_runtime_put_autosuspend(d40c->base->dev);
+		}
 
 		d40_desc_remove(d40d);
 		d40_desc_done(d40c, d40d);