Re: HDIO_DRIVE_CMD and hdparm

[Mark Lord <lkml@xxxxxx>]

Alan Cox wrote:
> >   - 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

Exactly.
I'll have hdparm-7.4 not complain on ENOTTY as well.

-ml
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