14dfl8.txt
;**************************************************************************************************
; LISTING 8 - FASYNC_HELPER() FUNCTION
;
; "Get those boards talking under Linux," EDN, July 6, 2000, pg 130
;
; http://www.ednmag.com/ednmag/reg/2000/070600/14df.htm
;**************************************************************************************************

static int pd_fasync(
    int fd,
    struct file *file,
    int mode
) {
    int board;
    board = MINOR(file->f_dentry->d_inode->i_rdev) / PD_MINOR_RANGE;
    return fasync_helper(fd, file, mode, &pd_board[board].fasync);
}