hselasky e9dde83ce2 Fix race in USB PF which can happen if we stop tracing exactly when
the kernel is tapping an USB transfer. This leads to a NULL pointer
access. The solution is to only trace while the USB bus lock is
locked.

MFC after:	2 weeks
2015-08-15 09:00:36 +00:00
..
2015-06-07 15:47:58 +00:00
2015-06-03 15:43:55 +00:00