diff --git a/drivers/rtc/class.c b/drivers/rtc/class.c
index 5396beec30d0ca62b3d97a0c73c0ac66cb8ceccc..1cb61a761cb284cc6dd590e6ebd8062f6271d246 100644
--- a/drivers/rtc/class.c
+++ b/drivers/rtc/class.c
@@ -94,7 +94,9 @@ struct rtc_device *rtc_device_register(const char *name, struct device *dev,
 	kfree(rtc);
 
 exit_idr:
+	mutex_lock(&idr_lock);
 	idr_remove(&rtc_idr, id);
+	mutex_unlock(&idr_lock);
 
 exit:
 	dev_err(dev, "rtc core: unable to register %s, err = %d\n",