> From: Nick Krause [mailto:xerofoify@xxxxxxxxx] > Sent: Monday, August 04, 2014 3:50 PM > > On Mon, Aug 4, 2014 at 5:55 PM, Paul Zimmerman > <Paul.Zimmerman@xxxxxxxxxxxx> wrote: > >> From: Valdis.Kletnieks@xxxxxx [mailto:Valdis.Kletnieks@xxxxxx] > >> Sent: Monday, August 04, 2014 1:28 PM > >> > >> On Mon, 04 Aug 2014 19:40:15 -0000, Paul Zimmerman said: > >> > >> > Ah, you didn't read far enough down the page :) > >> > >> I'm willing to bet a large pizza with everything but anchovies that > >> out in the real world, a lot of implementors didn't read further either. :) > > > > Nah, I won't take that bet :) > > > >> > So I have to believe there are a *lot* of systems out there that do support xHCI debug. > >> > >> Possibly. But enough to make an actual critical mass to motivate somebody > >> to write code? Or do you get more bang-for-buck by fixing kgdb to support > >> debugging over Ethernet? > > > > Well, code to support the xHCI debug capability has been written, see > > http://marc.info/?l=linux-usb&m=135948845511047. But I did not get > > approval from my management to spend the time needed to integrate this > > into the kernel's kgdb support. > > > > Nick, if you are still interested in this, you could take a look at the > > above code, and see if you can work out how to modify it to make it work > > with kgdb. But you will need a PC that has a debug-capable xHCI > > controller in order to test it. If you have PC or laptop with USB 3.0 > > built-in that has the Windows 8 logo, I think there's a good chance you > > already have one. Or, according to > > http://pete.akeo.ie/2011/08/do-necrenesas-upd720200-based-usb-30.html, > > plug-in USB 3.0 host cards that use the newer Renesas uPD720201 chipset > > also have the debug capability. > > > > Note that the above patch is against a pretty old kernel (3.6), so the > > first thing you would need to do is forward-port it to work on the > > latest kernel. As a plus, that would give you some real experience > > working with kernel code, which everyone seems to agree you need ;) > > > > -- > > Paul > > > > Paul , > My computer is rather old now as of Sandy Bridge days, so I probably > can't test the patch > on my own machine. However I will look at the code and see if I can > forward port it > against the usb git tree I have a current version of. In addition I > would like the new xhci > maintainers information in order to send out a patch with the > Maintainer for xhci updated. Sarah already told you who the new maintainer is, and then CCed him on this thread. Hint: There is a file name 'MAINTAINERS' in the root of the kernel tree, which tells you who the maintainers are for all of the subsystems. Please read Documentation/SubmittingPatches, it has a lot of information like this that you need to know. -- Paul ��.n��������+%������w��{.n�����{���)�� jg��� �����ݢj����G���� ���j:+v���w�m������w�������h�����٥
