K 10 svn:author V 8 hselasky K 8 svn:date V 27 2015-08-29T06:11:50.432174Z K 7 svn:log V 221 MFC r286799: 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. END