Call for Test and Review: bwn(4) - another Broadcom Wireless driver

[Gustau Pérez]

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>> I've been testing the driver for a few time with AMD64/CURRENT. A
>> few time ago I started to see messages like :
>>
>> bwn0: unsupported rate 0
>>
>> I've checked the code and I found it seems to fail when trying to
>> check the TX rate at if_bw.c:9561 (in bwn_ieeerate2hwrate
>> routine the rate parameter is 0). I checked where bwn_ieeerate2hwrate
>> is called, to see how 'rate' is calculated. This is where I got lost :(
>>
>> My AP is FreeBSD 8.0 box with an atheros card. My hostapd works
>> with both WPA2-PSK and WPA2-EAP (although
>> I thinks this is not the problem) but with default values for rates
>> and friends. I then forced my hostapd to use only a subset of transmit
>> rates (with supported_rates and basic_rates) with no luck.
>>
>> My laptop is a DELL D630 with a BCM4310 UART adapter.
>>
>> Any need info will be provided and any help will be appreciated.
>
> First I think we need to know that where rate == 0 comes from.  Rate
> information on TX could be got from the following points:
>
>     tp->mgmtrate
>     tp->mcastrate
>     tp->ucastrate
>     ni->ni_txrate
>
  Added some device_printf to test those values. This is what I got :

bwn0: tp->mgmtrate : 2
bwn0: tp->mcastrate : 2
bwn0: tp->ucastrate : 255
bwn0: ni->ni_txrate : 0

   I didn't have time to follow the code to find out why it has a 0
value. If you need
more info let me know.

   Regards,

   Gus

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