kern/171906: ath stop transmitting frames on AR5212 card

[Berislav]

>Number:         171906
>Category:       kern
>Synopsis:       ath stop transmitting frames on AR5212 card
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Sep 24 06:00:18 UTC 2012
>Closed-Date:
>Last-Modified:
>Originator:     Berislav
>Release:        -HEAD
>Organization:
>Environment:
FreeBSD pila.nmw 10.0-CURRENT FreeBSD 10.0-CURRENT #10: Sun Sep 23 22:37:40 CEST 2012     root at pila.nmw:/usr/obj/usr/src/sys/PILA  i386

>Description:
After upgrading to latest -HEAD ath driver stops sending tx frames after some time or under high traffic load. This problem happends only on non-11n cards!
Last revision of ath driver thats work ok is r240722. 

>How-To-Repeat:

>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted: