From 4cfe4ccf1608dd8cf29e36ec1eab59cdb2eb9125 Mon Sep 17 00:00:00 2001
From: Alexander Motin <mav@FreeBSD.org>
Date: Mon, 28 May 2012 14:33:15 +0000
Subject: [PATCH] Make legacy ATA to not call device_add_child() with unit
 number but without driver name. This fixed legacy ATA breakage by r235978.

MFC after:	1 week
---
 sys/dev/ata/ata-all.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sys/dev/ata/ata-all.c b/sys/dev/ata/ata-all.c
index 3caad019faed..6bee48d5b1a2 100644
--- a/sys/dev/ata/ata-all.c
+++ b/sys/dev/ata/ata-all.c
@@ -887,7 +887,7 @@ ata_add_child(device_t parent, struct ata_device *atadev, int unit)
 {
     device_t child;
 
-    if ((child = device_add_child(parent, NULL, unit))) {
+    if ((child = device_add_child(parent, (unit < 0) ? NULL : "ad", unit))) {
 	device_set_softc(child, atadev);
 	device_quiet(child);
 	atadev->dev = child;