linux-kernel - Re: USB serial regression 2.6.31.1 -> 2.6.31.2

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Message-Id: <1255238681.2192.30.camel@pasglop>
Date:	Sun, 11 Oct 2009 16:24:41 +1100
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Ben Efros <ben@...doctor.com>
Cc:	Alan Stern <stern@...land.harvard.edu>,
	fangxiaozhi <huananhu@...wei.com>, Greg KH <greg@...ah.com>,
	Kernel development list <linux-kernel@...r.kernel.org>,
	USB list <linux-usb@...r.kernel.org>,
	Hugh Blemings <hugh@...mings.org>,
	Josua Dietze <digidietze@...isberghof.de>
Subject: Re: USB serial regression 2.6.31.1 -> 2.6.31.2

On Sat, 2009-10-10 at 17:21 -0700, Ben Efros wrote:
> 
> Ben Herrenschmidt's patch[1] to retry without SANE_SENSE might be
> combined be able to be used to detect this 'INSANE_SENSE' scenario,
> but not in its current form.
> 
> Devices lying about the "additional sense length" doesn't seem all
> that common, so it might be better to just flag the device as insane
> and not worry about reworking Ben Herrenschmidt's patch.

I don't like flagging devices ... though we already somewhat do it for
the mode switch so it would be possible to stick the flag there.

Another option is to set the insane flag from a retry path similar
to what I posted so that it doesn't ping pong.

In any case, a decision should be made soon as current -stable is broken
and these devices are very common.

Cheers,
Ben. 

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