--- linux-4.20/sound/pci/rme32.c.vanilla	2019-03-03 15:09:34.485653177 +0000
+++ linux-4.20/sound/pci/rme32.c	2019-03-03 15:09:51.077653422 +0000
@@ -863,7 +863,7 @@
 		if (rme32->playback_substream) {
 			snd_pcm_period_elapsed(rme32->playback_substream);
 		}
-		writel(0, rme32->iobase + RME32_IO_CONFIRM_ACTION_IRQ);
+		writel(rme32->wcreg, rme32->iobase + RME32_IO_CONFIRM_ACTION_IRQ);
 	}
 
 	return IRQ_HANDLED;