linux-kernel - Re: HDIO_DRIVE

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Message-ID: <46431A92.8010501@rtr.ca>
Date:	Thu, 10 May 2007 09:13:54 -0400
From:	Mark Lord <lkml@....ca>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	Geert Uytterhoeven <Geert.Uytterhoeven@...ycom.com>,
	Linux Kernel Development <linux-kernel@...r.kernel.org>,
	linux-scsi@...r.kernel.org, linux-ide@...r.kernel.org
Subject: Re: HDIO_DRIVE_CMD and hdparm

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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