Hi Alan, On Tue, Jul 17, 2018 at 10:28:14AM -0400, Alan Stern wrote: > On Tue, 17 Jul 2018, Sudip Mukherjee wrote: > > > I did some more debugging. Tested with a KASAN enabled kernel and that > > shows the problem. The report is attached. > > > > To my understanding: > > > > btusb_work() is calling usb_set_interface() with alternate = 0. which > > again calls usb_hcd_alloc_bandwidth() and that frees the rings by > > xhci_free_endpoint_ring(). > > That doesn't sound like the right thing to do. The rings shouldn't be > freed until xhci_endpoint_disable() is called. > > On the other hand, there doesn't appear to be any > xhci_endpoint_disable() routine, although a comment refers to it. > Maybe this is the real problem?
one of your old mail might help :) https://www.spinics.net/lists/linux-usb/msg98123.html -- Regards Sudip _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
