port-i386/48736: System freezes when a devices connects to ath0 in hostap mode

[dvollen%gmail.com@localhost]

>Number:         48736
>Category:       port-i386
>Synopsis:       System freezes when a devices connects to ath0 in hostap mode
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    port-i386-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Apr 12 05:50:00 +0000 2014
>Originator:     Dave Vollenweider
>Release:        NetBSD 6.1
>Organization:
>Environment:
NetBSD shinji.studiolab45.net 6.1 NetBSD 6.1 (GENERIC) i386
>Description:
The system will completely freeze if a host connects to a wireless card using 
the ath driver when it is set in hostap mode.  There's not even a kernel panic; 
the whole system freezes.  This does not happen if the card is in adhoc or 
infrastructure  mode.

This issue also exists in NetBSD 6.0.  It did not exist in NetBSD 5.1 or 5.0.
>How-To-Repeat:
Set the card using the ath driver to hostap mode and have a device connect to 
it.
>Fix: