USB(xhci related) panic

[Chavdar Ivanov <ci4ic4%gmail.com@localhost>]

Hi,

On yesterday's -curreng 9.99.52, attaching an external usb DVD-RW device, I got:

uvm_fault(0xffffffff81750240, 0x0, 1) -> e
fatal page fault in supervisor mode
trap type 6 code 0 rip 0xffffffff8049e435 cs 0x8 rflags 0x10246 cr2
0x8 ilevel 0 rsp 0xffff8e8196f21b60
curlwp 0xffff8373d7b2fc00 pid 0.85 lowest kstack 0xffff8e8196f1e2c0
panic: trap
cpu6: Begin traceback...
vpanic() at netbsd:vpanic+0x178
snprintf() at netbsd:snprintf
startlwp() at netbsd:startlwp
alltraps() at netbsd:alltraps+0xc3
usbd_create_xfer() at netbsd:usbd_create_xfer+0x23b
umass_attach() at netbsd:umass_attach+0x950
config_attach_loc() at netbsd:config_attach_loc+0x1a8
config_found_sm_loc() at netbsd:config_found_sm_loc+0x4d
usbd_attachinterfaces() at netbsd:usbd_attachinterfaces+0x1c5
usbd_probe_and_attach() at netbsd:usbd_probe_and_attach+0x9b
xhci_new_device() at netbsd:xhci_new_device+0x688
usbd_new_device() at netbsd:usbd_new_device+0x55
uhub_explore() at netbsd:uhub_explore+0x2f2
usb_discover.isra.2() at netbsd:usb_discover.isra.2+0xdf
usb_event_thread() at netbsd:usb_event_thread+0x77
cpu6: End traceback...

On reboot the device worked.

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