diff --git a/drivers/staging/tm6000/tm6000-cards.c b/drivers/staging/tm6000/tm6000-cards.c
index 43620a3f5ec1..268a7de20d6d 100644
--- a/drivers/staging/tm6000/tm6000-cards.c
+++ b/drivers/staging/tm6000/tm6000-cards.c
@@ -496,6 +496,7 @@ static int tm6000_init_dev(struct tm6000_core *dev)
 		}
 #endif
 	}
+	mutex_unlock(&dev->lock);
 	return 0;
 
 err2: