diff --git a/sound/pci/pcxhr/pcxhr_core.c b/sound/pci/pcxhr/pcxhr_core.c
index c5194f5b150aadb7d0b08cd5831aab2a03f2392d..d7e71f3092998cdaa3894adefdd9468c236bb24e 100644
--- a/sound/pci/pcxhr/pcxhr_core.c
+++ b/sound/pci/pcxhr/pcxhr_core.c
@@ -1341,5 +1341,6 @@ irqreturn_t pcxhr_threaded_irq(int irq, void *dev_id)
 	}
 
 	pcxhr_msg_thread(mgr);
+	mutex_unlock(&mgr->lock);
 	return IRQ_HANDLED;
 }