Re: [RFC] Changes in mac80211 to make at76c50x-usb working again

[Kalle Valo <kvalo@adurom.com>]

Sebastian Smolorz <Sebastian.Smolorz@gmx.de> writes:

> Kalle Valo wrote:
>
>> I debugged this a long time ago. The problem is that firmware's
>> CMD_JOIN only works if bssid is correct one. I remember trying
>> ff:ff:ff:ff:ff:ff, but that didn't work for some reason. The join
>> command needs to be sent before association, otherwise transmission
>> won't work at all. And if I use a random bssid the firmware will
>> filter the replies. But I tested this a long time ago, I might
>> remember something wrong.
>> 
>> I was thinking a hack which would get bssid from association frames
>> and then send CMD_JOIN, before the association frame.
>
> Could you elaborate a little bit on this?

Basically my idea is this (all in tx path):

1. if tx frame is an association frame, get bssid from the frame
2. if bssid == priv->bssid, goto step 6
3. store tx frame, don't transmit it yet
4. send CMD_JOIN with new bssid
5. wait for command completion
6. priv->bssid = bssid
7. transmit tx frame
8. done

Ugly as hell, but one option to get the driver working again.

> How do we proceed to make the driver working again? Do you want to work on 
> this issue?

Sorry, currently I only have time to review patches and send comments.
If you have the time, it would be great to if you could fix the driver
finally.

-- 
Kalle Valo