Dear All： As far as I know, except switching in kernel, there isn't any mode switch solution on Android now. Do you have any good ideas for the mode switch on Android system? Best Regards, Franko Fang > -----Original Message----- > From: Dan Williams [mailto:dcbw@xxxxxxxxxx] > Sent: Wednesday, March 06, 2013 11:46 PM > To: Greg KH > Cc: Linlei (Lei Lin); Bjørn Mork; linux-usb@xxxxxxxxxxxxxxx; > linux-kernel@xxxxxxxxxxxxxxx; Xueguiying (Zihan); Yili (Neil); Wangyuhua; > Huqiao (C); balbi@xxxxxx; mdharm-usb@xxxxxxxxxxxxxxxxxx; > sebastian@xxxxxxxxxxxxx; stable; Fangxiaozhi (Franko) > Subject: Re: 答复: [PATCH] USB: storage: fix Huawei mode switching > regression > > On Wed, 2013-03-06 at 09:44 +0800, Greg KH wrote: > > On Wed, Mar 06, 2013 at 01:34:44AM +0000, Linlei (Lei Lin) wrote: > > > Hello Mork, > > > > > > >> ------ Because in the embedded linux system, Android, or Chrome > > > >> OS, etc. They don't integrate userspace usb_modeswitch utility > > > >> for switching. > > > > > > >Why not? If they can upgrade the kernel, then they most certainly can > install a userspace utility. > > > > > > >There is no excuse for an embedded system to do this differently. > > > >Please see e.g. OpenWRT as an example of an embedded system doing > this correctly. > > > > > > But currently Android and Chrome OS has not integrated the > > > usb_modeswitch utility. > > > > That is not a kernel problem. I find it hard to believe that Chrome > > OS would not gladly accept code to resolve this issue, can't you put > > it into the modemmanager or whatever Chrome OS uses to handle their > > wireless modems? > > They use ModemManager, and that's still not the best place to put > modeswitching. The best place to modeswitch anything is usb_modeswitch. > No sense duplicating the functionality that usb_modeswitch already supplies. > > Dan > > > > > As for Android, sorry, you are on your own, you will just have to deal > > with the individual OEMs that are incorporating your hardware :( > > > > > From a vendor's point of view, our purpose is to make our devices be > > > supported natively by those OS. > > > > We have a solution, usb_modeswitch, any user should be using that. > > > > > So we consider that add the switch function to the kernel resolves > > > the problem from the source. > > > Then this function will be inherited by Android & Chrome OS. > > > > Don't circumvent horribly governed userspace projects by getting > > changes into the Linux kernel. Go fix those projects instead. > > > > Good luck, > > > > greg k-h > > -- > > To unsubscribe from this list: send the line "unsubscribe linux-usb" > > in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo > > info at http://vger.kernel.org/majordomo-info.html > ��.n��������+%������w��{.n�����������ܨ}���Ơz�j:+v�����w����ޙ��&�)ߡ�a����z�ޗ���ݢj��w�f