From 8dbce2a343d264c6d9a9fa23ed1949ca64d3d4ba Mon Sep 17 00:00:00 2001
From: Eitan Adler <eadler@FreeBSD.org>
Date: Tue, 2 Oct 2012 03:33:41 +0000
Subject: [PATCH] Provide a generic way to disable devices at boot time

PR:		kern/119202
Requested by:	peterj
Reviewed by:	sbruno, jhb
Approved by:	cperciva
MFC after:	1 week
---
 sys/kern/subr_bus.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/sys/kern/subr_bus.c b/sys/kern/subr_bus.c
index d71d0b99d29..c41fba09464 100644
--- a/sys/kern/subr_bus.c
+++ b/sys/kern/subr_bus.c
@@ -2762,6 +2762,13 @@ device_attach(device_t dev)
 {
 	int error;
 
+	if (resource_disabled(dev->driver->name, dev->unit)) {
+		device_disable(dev);
+		if (bootverbose)
+			 device_printf(dev, "disabled via hints entry\n");
+		return (ENXIO);
+	}
+
 	device_sysctl_init(dev);
 	if (!device_is_quiet(dev))
 		device_print_child(dev->parent, dev);