linux-kernel - Re: [Re: Linux 2.6.26-rc2] Write protect on on

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Message-ID: <4831BCAA.8040509@panasas.com>
Date:	Mon, 19 May 2008 20:45:14 +0300
From:	Boaz Harrosh <bharrosh@...asas.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
CC:	Alan Stern <stern@...land.harvard.edu>,
	Maciej Rutecki <maciej.rutecki@...il.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	USB list <linux-usb@...r.kernel.org>,
	USB Storage list <usb-storage@...ts.one-eyed-alien.net>,
	SCSI development list <linux-scsi@...r.kernel.org>
Subject: Re: [Re: Linux 2.6.26-rc2] Write protect on on

Linus Torvalds wrote:
> 
> On Mon, 19 May 2008, Boaz Harrosh wrote:
>> Sure, inspecting other places that emulate MODE_SENSE, (And inspecting the scsi
>> spec) all zeros is a very good scsi response. Alan do you want to send a fix for all
>> places that initiate a MODE_SENSE command, specifically at
>> scsi_scan.c::scsi_unlock_floptical() ? (Some other places do)
> 
> I was actualyl more thinking that the safest thing to do would be to just 
> pre-clear the sense buffer. Then, if some driver doesn't fill it 
> correctly, big deal..

The sense buffer *is* always cleared and it is mandated by scsi spec.
But the problem above is that the actual data buffer for read, had 
garbage data, and *no* read was actually preformed do to none-standard 
device response.

> 
> It's not like pre-clearing the bugger is a performance issue.
> 
> 		Linus
> --

Boaz
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