update_post_meta() not working in save_post

Hi,

I have added some text input fields to metabox in my custom post. Now whenever I put some data in those text fields in admin panel and click ‘save’, all data vanishes. Here is the code:

<?php
function swpd_render_info_fields()
{
    ?>
    <label for="swpd_comany_addr">Company Address</label>
    <input type="text" name="swpd_company_addr" id="swpd_company_addr" />
    <?php
}
/* * Process the custom metabox fields */
add_action( 'save_post', 'swpd_save_info_fields',99 );
function swpd_save_info_fields($post_id) {
    global $post;
    if(isset($_POST['post_type']) && ($_POST['post_type'] == "swpd_directory")){
        update_post_meta( $post->ID, 'swpd_company_addr', $_POST['swpd_company_addr'] );
    }
}
?>

I have checked the data passed to update_post_meta() and it seems o be fine, $post->ID containes the post ID and $_POST[‘swpd_company_addr’] containes the string I want to save to meta. What can be wrong?