dmaengine: omap-dma: Add memory barrier to dma_resume path
authorPeter Ujfalusi <peter.ujfalusi@ti.com>
Tue, 16 Sep 2014 19:45:56 +0000 (22:45 +0300)
committerVinod Koul <vinod.koul@intel.com>
Tue, 23 Sep 2014 12:52:54 +0000 (18:22 +0530)
Add mb() call to resume path to ensure the necessary barrier.
Resume can happen after waking up from suspend for example.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
drivers/dma/omap-dma.c

index 4cf7d9a..c01ea50 100644 (file)
@@ -1017,6 +1017,8 @@ static int omap_dma_resume(struct omap_chan *c)
                return -EINVAL;
 
        if (c->paused) {
+               mb();
+
                omap_dma_start(c, c->desc);
                c->paused = false;
        }