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List:       linux-wireless
Subject:    Re: Compat-wireless-3.2-rc6-3 is broken for rt2860 device
From:       Andreas Hartmann <andihartmann () 01019freenet ! de>
Date:       2011-12-31 20:35:04
Message-ID: 4EFF71F8.6070208 () 01019freenet ! de
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Andreas Hartmann schrieb:
> Hello,
> 
> I tested compat-wireless-3.2-rc6-3 with kernel 3.1 and a rt2860 device
> running in AP mode (80211.n - 40 MHz). During
> 
> netperf -t TCP_STREAM -H ap
> 
> the data stream mostly stalls (-> the device receives data) after a few
> seconds and never comes up any more. The connection is completely death.
> I have to restart wpa_supplicant to get it working again.
> 
> 
> 
> I tried to isolate the problem the following way:
> 
> 1. Running compat-wireless-3.2-rc6-3 with the rt2x00 level from
> compat-wireless-3.1.1-1. The problem didn't gone.
> 
> 2. Running compat-wireless-3.1.1-1 with the rt2x00 based changes in
> compat-wireless-3.2-rc6-3. I can't see the problem any more.
> 
> 
> That's why I think, that the problem must be outside the rt2x00 changes.
> But there are many changes outside :-).


Removing this patch

mac80211: retry sending failed BAR frames later instead of tearing down
aggr (http://www.spinics.net/lists/linux-wireless/msg76379.html) makes
it working again.

Device is: RaLink RT2800 802.11n PCI


Kind regards,
Andreas Hartmann
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