aha152x_hostdata
struct aha152x_hostdata *hd;
struct aha152x_hostdata *hd, *tmp;
#define HOSTDATA(shpnt) ((struct aha152x_hostdata *) &shpnt->hostdata)
shpnt = scsi_host_alloc(&aha152x_driver_template, sizeof(struct aha152x_hostdata));