[PATCH 064/105] ncpfs: fix rmdir returns Device or resource busy

From: Kamal Mostafa
Date: Fri Jun 28 2013 - 14:54:37 EST


3.8.13.4 -stable review patch. If anyone has any objections, please let me know.

------------------

From: Dave Chiluk <chiluk@xxxxxxxxxxxxx>

commit 698b8223631472bf982ed570b0812faa61955683 upstream.

1d2ef5901483004d74947bbf78d5146c24038fe7 caused a regression in ncpfs such that
directories could no longer be removed. This was because ncp_rmdir checked
to see if a dentry could be unhashed before allowing it to be removed. Since
1d2ef5901483004d74947bbf78d5146c24038fe7 introduced a change that incremented
dentry->d_count causing it to always be greater than 1 unhash would always
fail. Thus causing the error path in ncp_rmdir to always be taken. Removing
this error path is safe as unhashing is still accomplished by calls to dput
from vfs_rmdir.

Signed-off-by: Dave Chiluk <chiluk@xxxxxxxxxxxxx>
Signed-off-by: Petr Vandrovec <petr@xxxxxxxxxxxxxx>
Signed-off-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Kamal Mostafa <kamal@xxxxxxxxxxxxx>
---
fs/ncpfs/dir.c | 9 ---------
1 file changed, 9 deletions(-)

diff --git a/fs/ncpfs/dir.c b/fs/ncpfs/dir.c
index 4117e7b..1355295 100644
--- a/fs/ncpfs/dir.c
+++ b/fs/ncpfs/dir.c
@@ -1033,15 +1033,6 @@ static int ncp_rmdir(struct inode *dir, struct dentry *dentry)
DPRINTK("ncp_rmdir: removing %s/%s\n",
dentry->d_parent->d_name.name, dentry->d_name.name);

- /*
- * fail with EBUSY if there are still references to this
- * directory.
- */
- dentry_unhash(dentry);
- error = -EBUSY;
- if (!d_unhashed(dentry))
- goto out;
-
len = sizeof(__name);
error = ncp_io2vol(server, __name, &len, dentry->d_name.name,
dentry->d_name.len, !ncp_preserve_case(dir));
--
1.8.1.2

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