http://marc2.theaimsgroup.com/?l=linux-wlan-devel&m=114022514719172&w=2
This might fix the problem
** Changed in: linux-source-2.6.15 (Ubuntu)
Assignee: (unassigned) => ChuckShort
Status: Rejected => In Progress
--
oops in prism2_usb from 2.6.15-20
https://launchpad.net/bugs/38691