linux-kernel - Re: USB serial regression 2.6.31.1 -> 2.6.31.2 [PATCH]

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Message-ID: <Pine.LNX.4.44L0.0910131003250.3169-100000@iolanthe.rowland.org>
Date:	Tue, 13 Oct 2009 10:03:48 -0400 (EDT)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
cc:	Ben Efros <ben@...doctor.com>,
	Josua Dietze <digidietze@...isberghof.de>,
	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>
Subject: Re: USB serial regression 2.6.31.1 -> 2.6.31.2 [PATCH]

On Tue, 13 Oct 2009, Benjamin Herrenschmidt wrote:

> usb-storage: Workaround devices with bogus sense size
> 
> Some devices, such as Huawei E169, advertise more than the standard
> amount of sense data, causing us to set US_FL_SANE_SENSE, assuming
> they support it. However, they subsequently fail the request sense
> with that size.
> 
> This works around it generically. When a sense request fails due to
> a device returning an error, US_FL_SANE_SENSE was set, and that sense
> request used a larger sense size, we retry with a smaller size before
> giving up.
> 
> Based on an original patch by Ben Efros <ben@...doctor.com>
> 
> Signed-off-by: Benjamin Herrenschmidt <benh@...nel.crashing.org>

Acked-by: Alan Stern <stern@...land.harvard.edu>

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