linux-kernel - [PATCH for-3.6] debugfs: change parameter check in debugfs

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Date:	Wed, 23 May 2012 15:13:07 +0200
From:	"Arend van Spriel" <arend@...adcom.com>
To:	"Greg Kroah-Hartman" <gregkh@...uxfoundation.org>
cc:	linux-kernel@...r.kernel.org,
	"Arend van Spriel" <arend@...adcom.com>
Subject: [PATCH for-3.6] debugfs: change parameter check in
 debugfs_remove() functions

The dentry parameter in debugfs_remove() and debugfs_remove_recursive()
is checked being a NULL pointer. To make cleanup by callers easier this
check is extended using the IS_ERR_OR_NULL macro instead because the
debugfs_create_... functions can return a ERR_PTR() value.

Signed-off-by: Arend van Spriel <arend@...adcom.com>
---
I was adding the check in driver code before calling the recursive remove,
but considered it might be a better idea to do it in debugfs itself.

No rush so I target to include it in v3.6. The patch is based on v3.4 tag.

Gr. AvS
---
 fs/debugfs/inode.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c
index b80bc84..0de5e26 100644
--- a/fs/debugfs/inode.c
+++ b/fs/debugfs/inode.c
@@ -498,7 +498,7 @@ void debugfs_remove(struct dentry *dentry)
 	struct dentry *parent;
 	int ret;
 
-	if (!dentry)
+	if (IS_ERR_OR_NULL(dentry))
 		return;
 
 	parent = dentry->d_parent;
@@ -530,7 +530,7 @@ void debugfs_remove_recursive(struct dentry *dentry)
 	struct dentry *child;
 	struct dentry *parent;
 
-	if (!dentry)
+	if (IS_ERR_OR_NULL(dentry))
 		return;
 
 	parent = dentry->d_parent;
-- 
1.7.9.5


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