[PATCH] reiserfs+acl+quota deadlock fix

When i_acl_default is set to some error we do not hold the lock (hence we
are not allowed to drop it and reacquire later).

Signed-off-by: Jan Kara <jack@suse.cz>
Cc: Jeff Mahoney <jeffm@suse.com>
Cc: Chris Mason <mason@suse.com>
Cc: <reiserfs-dev@namesys.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c
index d9f614a..ff291c9 100644 (file)
--- a/fs/reiserfs/inode.c
+++ b/fs/reiserfs/inode.c
@@ -1985,7 +1985,7 @@ int reiserfs_new_inode(struct reiserfs_transaction_handle *th,
         * iput doesn't deadlock in reiserfs_delete_xattrs. The locking
         * code really needs to be reworked, but this will take care of it
         * for now. -jeffm */
-       if (REISERFS_I(dir)->i_acl_default) {
+       if (REISERFS_I(dir)->i_acl_default && !IS_ERR(REISERFS_I(dir)->i_acl_default)) {
                reiserfs_write_unlock_xattrs(dir->i_sb);
                iput(inode);
                reiserfs_write_lock_xattrs(dir->i_sb);