Hi Pelle Windestam: > >>>>> Odd, you have a usb-serial gadget device in this system that is > >>>>> disconnecting somehow? That oops doesn't point to anything in the > >>>>> usb gadget codebase, "all" we have done is move the call to > >>>>> shutdown the endpoints to earlier in the disconnect function. > >>>> > >>>> Yes the board starts usb-serial and usb-ethernet gadget and on > >>>> reboot when tearing it down I am seeing the above. As soon as it > >>>> disables the tegra-xudc endpoints (as seen above) the board appears > >>>> to > >> stall. > >>>> > >>>>> I'm glad to revert this, but it feels really odd that this is > >>>>> causing you an rcu stall issue. > >>>> > >>>> Thanks. I can't say I understand it either, but I am certain it is > >>>> caused by this change. > >>>> > > I do not have much to add in terms of solutions but want to chime in that the > same issue happened to me the other day when I upgraded my kernel. It > manifests itself with the rcu stall whenever I try to reboot my device with the > USB-cable connected (it is a usb-serial gadget device). Moving the > usb_ep_disable() calls to outside the lock (where they were before the > patch) solves it. I apologize again. I didn't consider it comprehensively. The modification plan has introduced serious negative problems for you. The main line of the patch has been rolled back. https://lore.kernel.org/all/2025011711-yippee-fever-a737@gregkh/ Thanks
