misc/183430: [iwn] latest change to the rate code setup uses 11n rates on an 11n channel when 11n rates aren't provided

[adrian chadd]

>Number:         183430
>Category:       misc
>Synopsis:       [iwn] latest change to the rate code setup uses 11n rates on an 11n channel when 11n rates aren't provided
>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:   Tue Oct 29 04:00:01 UTC 2013
>Closed-Date:
>Last-Modified:
>Originator:     adrian chadd
>Release:        
>Organization:
>Environment:
-HEAD
>Description:
the latest changes in iwn messed up how the rates are calculated.

the PLCP lookup code is doing the wrong thing - it assumes that an 11n channel will always have 11n traffic. However, some management traffic may be non-11n. So, support that.

Some 11n APs get very unhappy if you send them 11n management frames, so don't do that.
>How-To-Repeat:

>Fix:


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