NFS: remove error field from nfs_readdir_descriptor_t

The error field in nfs_readdir_descriptor_t is never used outside of the
function in which it is set. Remove the field and change the place that
does use it to use an existing local variable.
Signed-off-by: NJeff Layton <jlayton@redhat.com>
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>

fs/nfs/dir.c

@@ -154,7 +154,6 @@ typedef struct {
 	struct nfs_entry *entry;
 	decode_dirent_t	decode;
 	int		plus;
-	int		error;
 	unsigned long	timestamp;
 	int		timestamp_valid;
 } nfs_readdir_descriptor_t;
@@ -213,7 +212,6 @@ int nfs_readdir_filler(nfs_readdir_descriptor_t *desc, struct page *page)
 	return 0;
  error:
 	unlock_page(page);
-	desc->error = error;
 	return -EIO;
 }
 
@@ -483,13 +481,13 @@ int uncached_readdir(nfs_readdir_descriptor_t *desc, void *dirent,
 		goto out;
 	}
 	timestamp = jiffies;
-	desc->error = NFS_PROTO(inode)->readdir(file->f_path.dentry, cred, *desc->dir_cookie,
-						page,
+	status = NFS_PROTO(inode)->readdir(file->f_path.dentry, cred,
+						*desc->dir_cookie, page,
 						NFS_SERVER(inode)->dtsize,
 						desc->plus);
 	desc->page = page;
 	desc->ptr = kmap(page);		/* matching kunmap in nfs_do_filldir */
-	if (desc->error >= 0) {
+	if (status >= 0) {
 		desc->timestamp = timestamp;
 		desc->timestamp_valid = 1;
 		if ((status = dir_decode(desc)) == 0)