linux-kernel - Re: [PATCH v2] scsi: ufs: add ioctl interface for query request

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Date:	Wed, 07 Oct 2015 14:37:35 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	ygardi@...eaurora.org
Cc:	james.bottomley@...senpartnership.com,
	linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org,
	linux-arm-msm@...r.kernel.org, santoshsy@...il.com,
	linux-scsi-owner@...r.kernel.org, subhashj@...eaurora.org,
	gbroner@...eaurora.org, draviv@...eaurora.org,
	Noa Rubens <noag@...eaurora.org>,
	Raviv Shvili <rshvili@...eaurora.org>,
	Vinayak Holikatti <vinholikatti@...il.com>,
	"James E.J. Bottomley" <jbottomley@...n.com>,
	"open list:ABI/API" <linux-api@...r.kernel.org>
Subject: Re: [PATCH v2] scsi: ufs: add ioctl interface for query request

On Wednesday 07 October 2015 12:27:54 ygardi@...eaurora.org wrote:
> 
> >> +
> >> +/*
> >> + *  IOCTL opcode for ufs queries has the following opcode after
> >> + *  SCSI_IOCTL_GET_PCI
> >> + */
> >> +#define UFS_IOCTL_QUERY                     0x5388
> >
> > Use _IOWR() to define that number with the correct argument length
> 
> i'd rather leave it as is, to be compatible with the SCSI_IOCTL
> opcodes that are defined in scsi_ioctl.h

Do you mean you require this code to work on SunOS? ;-)

If not, better use the normal conventions that Linux and BSD have for
new ioctls.

Note that the 0x53xx ioctl command numbers are also used by
include/uapi/linux/cdrom.h, this one would be right in the middle
of that.

	Arnd
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