Re: HDIO_DRIVE_CMD and hdparm

[Alan Cox]

>   - SCSI doesn't handle HDIO_DRIVE_CMD(null), and returns EINVAL
>     => fine for hdparm
>   - If a block device doesn't support the ioctl, blkdev_driver_ioctl() returns
>     ENOTTY
>     => hdparm error message

Those are both correct
	-ENOTTY 		I don't know this ioctl
	-EINVAL			I know this ioctl, usage wrong
	0			Hey it worked

	ENOIOCTLCMD		Internal (not user exposed)
				for fallthrough

	ENOSYS			CD-ROM being weird.

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/