[patch 17/21] seq_file: return a negative error code when seq_path_root() fails.

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From: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx>

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@xxxxxxxxxxxxxxxxxxx>
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 fs/seq_file.c |    1 +
 1 file changed, 1 insertion(+)

diff -puN fs/seq_file.c~seq_file-return-a-negative-error-code-when-seq_path_root-fails fs/seq_file.c
--- a/fs/seq_file.c~seq_file-return-a-negative-error-code-when-seq_path_root-fails
+++ a/fs/seq_file.c
@@ -470,6 +470,7 @@ int seq_path_root(struct seq_file *m, st
 				m->count = s - m->buf;
 				return 0;
 			}
+			err = -ENAMETOOLONG;
 		}
 	}
 	m->count = m->size;
_
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