Hi Juan, On Tue, Nov 21, 2017 at 12:24:01PM +0100, Juan Zea wrote: > Please excuse me... I have reported two different problems in this post, and I think things are mixing up a bit. My bad. I've found two different problems: > > 1.- When compiling vhci driver with multiple hubs (in latest kernel), usbip tool doesn't seem able to "jump" to the second controller. As far as I understand, it seems to be a problem with high speed devices trying to get connected to super speed ports. I made a patch for avoiding this situation which is almost the same as the one you just sent. Both patches work. I can compile with several hubs of one port, and connect two devices via usbip and the second gets connected to the second controller (skipping the super speed port of first controller). > > 2.- The problem is some of these devices don't work, whatsoever controller or hub compiling configuration I do. A fingerprint reader and also recently discovered flash usb sticks don't work either. You can connect them with usbip tool, and they list with lsusb with no problem at all. But when you try to use them, you get this "kernel BUG at drivers/usb/usbip/vhci_hcd.c:669!" (by the way, the line number has changed in the latest pull from master I've just tested, but it's the same line of code). This second problem is the one I bisected in my last message. And I got to the commit 03cd00d538a6feb0492cd153edf256ef7d7bd95e, in which both devices stop working. It'd be good if you can give greater detail of the exact (as much info as possible) setting of the fingerprint reader case. > The patch you sent fixes 1 but not 2. And yes, I'm using non-super-speed devices for testing. This was what I understood. Just want to make sure we are on the same page. > I hope this helped, and sorry for the mess, Yes, it helped. My sincere apologies for the mess I created! Thanks, Yuyang -- 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
