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Re: Connection issues with BW Tracking in mac80211

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On Tue, 2015-02-24 at 15:58 +0530, Krishna Chaitanya wrote:

> STA (mac80211) connects to AP in VHT-80.
> AP is reconfigured to 11n40 (stops beaconing for about 30secs and then
> starts again).
> STA loses connection (HW_CONN_TRACK), iee80211_connection_loss is called.
> STA see's AP again and tries to connect,

But this goes through the supplicant, right? You actually get a full
connection loss (which I certainly would expect after 30 seconds)

>  but due to BW tracking in
> mac80211 it doesn't connect.
> 
> So i guess we are not resetting the tracking after losing connection.

Right, some flag is not getting reset correctly I suppose. I thought we
had pretty robust code for this, but I guess not.

Easiest might be to print the flags and other state for during all
connection attempts, and then compare
 * VHT connection
 * subsequent HT connection
 * HT connection after reloading the driver

johannes

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