kern/181132: [iwn] stream calculation is wrong for the Intel 4965

[Adrian Chadd]

>Number:         181132
>Category:       kern
>Synopsis:       [iwn] stream calculation is wrong for the Intel 4965
>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 Aug 08 05:50:00 UTC 2013
>Closed-Date:
>Last-Modified:
>Originator:     Adrian Chadd
>Release:        -HEAD
>Organization:
>Environment:
>Description:
When the 4965 probes (and bootverbose is set), it sees 2 transmit radios and 3 receive radios. So it assumes that the hardware is a 2T3R device. Which is actually incorrect - even though it has three receive radios, it's still a two-stream receive device.

>How-To-Repeat:
* Bootverbose!
* Probe/attach an Intel 4965
* See what's going on!
>Fix:
Until Intel 3x3 devices are supported, we should limit the TX/RX stream counts to 2.

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