linux-kernel - Re: [PATCH repost 3] [SCSI] Retrieve the Caching mode page

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Date:	Wed, 8 Dec 2010 09:00:28 -0700
From:	Matthew Wilcox <matthew@....cx>
To:	Alan Stern <stern@...land.harvard.edu>
Cc:	James Bottomley <James.Bottomley@...e.de>,
	Greg KH <greg@...ah.com>, Luben Tuikov <ltuikov@...oo.com>,
	Matthew Dharm <mdharm-kernel@...-eyed-alien.net>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org,
	linux-usb@...r.kernel.org
Subject: Re: [PATCH repost 3] [SCSI] Retrieve the Caching mode page

On Wed, Dec 08, 2010 at 10:57:46AM -0500, Alan Stern wrote:
> In the strictest sense, there's always a possibility that any change
> will crash _some_ device somewhere.  In this case I believe the
> probability is very low.  Luben's patch does not change the commands
> sent to a USB device; it only changes the kernel's interpretation of
> the data sent back.  Unless things are terribly badly broken, this 
> won't hurt.

It doesn't change the _discovery_ commands sent to the device, but (I
think ...) it will change the subsequent commands sent to the device;
eg we'll now send it SYNCHRONISE CACHE when we wouldn't have before.
I think it's low-risk too, and am in favour of seeing this patch applied.

-- 
Matthew Wilcox				Intel Open Source Technology Centre
"Bill, look, we understand that you're interested in selling us this
operating system, but compare it to ours.  We can't possibly take such
a retrograde step."
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