Man page 9 : ata_task_ioctl

ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl

int ata_task_ioctl(struct scsi_device *  scsidev , void __user *  arg );

scsidev
    Device to which we are issuing command

arg
    User provided data for issuing command

Defined by the SCSI layer. We donAqt really care.

Zero on success, negative errno on error.

Jeff Garzik
    Author.