From: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Date: Fri, 18 Sep 2009 20:05:59 +0000 (-0700)
Subject: seq_file: return a negative error code when seq_path_root() fails.
X-Git-Tag: v2.6.32-rc1~58^2~13
X-Git-Url: https://bbs.cooldavid.org/git/?p=net-next-2.6.git;a=commitdiff_plain;h=7a62cc10215838286c747f86766063d5f01fcbd6

seq_file: return a negative error code when seq_path_root() fails.

seq_path_root() is returning a return value of successful __d_path()
instead of returning a negative value when mangle_path() failed.

This is not a bug so far because nobody is using return value of
seq_path_root().

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---

diff --git a/fs/seq_file.c b/fs/seq_file.c
index 6c959275f2d..66efd0aa8fb 100644
--- a/fs/seq_file.c
+++ b/fs/seq_file.c
@@ -470,6 +470,7 @@ int seq_path_root(struct seq_file *m, struct path *path, struct path *root,
 				m->count = s - m->buf;
 				return 0;
 			}
+			err = -ENAMETOOLONG;
 		}
 	}
 	m->count = m->size;