linux-kernel - [PATCH 3/3] sysfs: remove BUG_ON() from sysfs_remove

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Date:	Thu,  7 Feb 2008 12:02:19 -0800
From:	Greg Kroah-Hartman <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...e.de>,
	Roland Dreier <rdreier@...co.com>, Tejun Heo <htejun@...il.com>
Subject: [PATCH 3/3] sysfs: remove BUG_ON() from sysfs_remove_group()

It's possible that the caller of sysfs_remove_group messed up and passed in an attribute group that was not really registered to this kobject.  But don't panic for such a foolish error, spit out a warning about what happened, and continue on our way safely.

Cc: Roland Dreier <rdreier@...co.com>
Cc: Tejun Heo <htejun@...il.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
---
 fs/sysfs/group.c |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)

diff --git a/fs/sysfs/group.c b/fs/sysfs/group.c
index 0871c3d..4779049 100644
--- a/fs/sysfs/group.c
+++ b/fs/sysfs/group.c
@@ -77,7 +77,12 @@ void sysfs_remove_group(struct kobject * kobj,
 
 	if (grp->name) {
 		sd = sysfs_get_dirent(dir_sd, grp->name);
-		BUG_ON(!sd);
+		if (!sd) {
+			printk(KERN_WARNING "sysfs group %p not found for "
+				"kobject '%s'\n", grp, kobject_name(kobj));
+			WARN_ON(!sd);
+			return;
+		}
 	} else
 		sd = sysfs_get(dir_sd);
 
-- 
1.5.4

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