kern/166684: [ath] [net80211] mgmtrate/mcastrate isn't updated based on the the BSS rate list

[Adrian Chadd]

>Number:         166684
>Category:       kern
>Synopsis:       [ath] [net80211] mgmtrate/mcastrate isn't updated based on the the BSS rate list
>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:   Thu Apr 05 22:30:08 UTC 2012
>Closed-Date:
>Last-Modified:
>Originator:     Adrian Chadd
>Release:        9.0-RELEASE i386, with -HEAD net80211/ath
>Organization:
>Environment:
FreeBSD marilyn 9.0-RELEASE FreeBSD 9.0-RELEASE #7: Wed Mar 28 18:09:26 PDT 2012     root at marilyn:/usr/src/sys/i386/compile/MARILYN  i386

>Description:
The mgmtrate/mcastrate parameters aren't "fixed" when a station joins a BSS whose basic rate is not the lowest rate.

Ie, if the rate set is advertised at {12, 24, 36, 48, 54} in an 802.11a BSS, FreeBSD will still try TX'ing 6MB and treat that as the basic rate.

It'll be TXed (and hopefully ACKed) but then ath_rate_sample complains that the rate doesn't exist.

>How-To-Repeat:
Associate to an AP that doesn't announce the lowest 11b/11a rate.

>Fix:


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