linux-kernel - Re: [PATCH 1/1]linux-usb: optimize to match the Huawei USB storage devices and support new switch command

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Message-ID: <6646955.7QFMbxFQIx@linux-lqwf.site>
Date:	Fri, 14 Dec 2012 11:42:34 +0100
From:	Oliver Neukum <oneukum@...e.de>
To:	"Fangxiaozhi (Franko)" <fangxiaozhi@...wei.com>
Cc:	Alan Cox <alan@...rguk.ukuu.org.uk>,
	"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>,
	"greg@...ah.com" <greg@...ah.com>,
	"Yili (Neil)" <neil.yi@...wei.com>,
	"Wangyuhua (Roger, Credit)" <wangyuhua@...wei.com>,
	Huqiao <huqiao36@...wei.com>
Subject: Re: [PATCH 1/1]linux-usb: optimize to match the Huawei USB storage devices and support new switch command

On Friday 14 December 2012 10:28:31 Fangxiaozhi wrote:

Hi,

> > For such devices we should put the switching code into generic code, not a
> > device driver so that we have a chance to do reset_resume() on those
> > devices.
> --------------Because in many embedded linux system, they don't include such switch tools themselves. 
> 			So I think it is better to put the switching code in device driver.

Well, that argues for doing it in the kernel. Where you do it in the kernel shouldn't
matter.

> --------------By the way, because our device will response the switching command for once, 
> 			so I think you can do reset_resume() as you want.

What happens if S3 cuts power to the device?

	Regards
		Oliver

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