On Mon, Aug 4, 2014 at 7:03 PM, Paul Zimmerman <Paul.Zimmerman@xxxxxxxxxxxx> wrote: >> 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 > Thanks I will read this file and thanks for the information. I known where the file is I will add the information then. Regards Nick -- 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
