staging: lustre: llite: set next only when needed in ll_dir_read

The variable next needs only to be set when done is false.
Signed-off-by: wang di <di.wang@intel.com>
Reviewed-on: http://review.whamcloud.com/10761
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-4906Reviewed-by: John L. Hammond <john.hammond@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/lustre/lustre/llite/dir.c

@@ -561,8 +561,9 @@ int ll_dir_read(struct inode *inode, struct md_op_data *op_data,
 			done = !dir_emit(ctx, ent->lde_name,
 					 namelen, ino, type);
 		}
-		next = le64_to_cpu(dp->ldp_hash_end);
+
 		if (!done) {
+			next = le64_to_cpu(dp->ldp_hash_end);
 			pos = next;
 			if (pos == MDS_DIR_END_OFF) {
 				/*