Get all posts from specific author

Hi !
How to get all posts from a specific author on wordpress? I use the following code to make an array, but it didn't work.

global $current_user;
						get_currentuserinfo();                      

						$args = array(
							'author'        =>  $current_user->ID,
							'orderby'       =>  'post_date',
							'order'         =>  'ASC' ,
							'posts_per_page' => 1
							);
						$current_user_posts = get_posts( $args );