From 8f0d99d7907aab7e2502b08623a9180fac59edad Mon Sep 17 00:00:00 2001
From: Robert Watson <rwatson@FreeBSD.org>
Date: Tue, 3 Jan 2006 09:49:10 +0000
Subject: [PATCH] When returning EIO from DEVFSIO_RADD ioctl, drop the
 exclusive rule lock.  Otherwise the system comes to a rather sudden and
 grinding halt.

MFC after:	1 week
---
 sys/fs/devfs/devfs_rule.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/sys/fs/devfs/devfs_rule.c b/sys/fs/devfs/devfs_rule.c
index 840f9f970e7..bfd23b7ec22 100644
--- a/sys/fs/devfs/devfs_rule.c
+++ b/sys/fs/devfs/devfs_rule.c
@@ -186,8 +186,10 @@ devfs_rules_ioctl(struct devfs_mount *dm, u_long cmd, caddr_t data, struct threa
 			error = EEXIST;
 			break;
 		}
-		if (rid2rsn(dr->dr_id) == 0)
-			return (EIO);
+		if (rid2rsn(dr->dr_id) == 0) {
+			error = EIO;
+			break;
+		}
 		error = devfs_rule_insert(dr);
 		break;
 	case DEVFSIO_RAPPLY: