linux-kernel - Re: v3.8 regression: Huawei mode switching fails (was Re: [PATCH 2/2]linux-usb:optimize to match the Huawei USB storage devices and support new switch command)

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Message-ID: <20130306014001.GD8260@kroah.com>
Date:	Wed, 6 Mar 2013 09:40:01 +0800
From:	"greg@...ah.com" <greg@...ah.com>
To:	Bjørn Mork <bjorn@...k.no>
Cc:	"Fangxiaozhi (Franko)" <fangxiaozhi@...wei.com>,
	Oliver Neukum <oneukum@...e.de>,
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Xueguiying (Zihan)" <zihan.xue@...wei.com>,
	"Linlei (Lei Lin)" <lei.lin@...wei.com>,
	"Yili (Neil)" <neil.yi@...wei.com>,
	"Wangyuhua (Roger, Credit)" <wangyuhua@...wei.com>,
	"Huqiao (C)" <huqiao36@...wei.com>, "balbi@...com" <balbi@...com>,
	"mdharm-usb@...-eyed-alien.net" <mdharm-usb@...-eyed-alien.net>,
	"sebastian@...akpoint.cc" <sebastian@...akpoint.cc>
Subject: Re: v3.8 regression: Huawei mode switching fails (was Re: [PATCH
 2/2]linux-usb:optimize to match the Huawei USB storage devices and support
 new switch command)

On Tue, Mar 05, 2013 at 01:23:33PM +0100, Bjørn Mork wrote:
> As you are well aware of, we parse descriptors as needed on Linux and
> can just as easy support the Windows look'n'feel if required.  There is
> absolutely no need to create special Linux descriptors to adapt to
> existing drivers.  We'll rather fix the drivers than using a mode which
> isn't tested by the Windows users.

I totally agree with this, and this is the way the rest of Linux works.
There should not be any difference in the hardware descriptors between
operating systems.

If Linux isn't working properly for some hardware, we will fix it, do
not work around Linux issues (perceived or real) in hardware.

Bjørn, thanks for catching this kernel change, I'll revert it and push
the changes to the stable kernel releases.  It was my fault to not
notice this bug, my apologies.

greg k-h
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