[rt2x00-users] [bugzilla-daemon at bugzilla.kernel.org: [Bug 42828] rt2800pci unstable - chokes after too much I/O]

Helmut Schaa helmut.schaa at googlemail.com
Fri Oct 19 08:08:59 AEDT 2012


Hi,

On Thu, Oct 18, 2012 at 8:48 PM, Andreas Hartmann
<andihartmann at 01019freenet.de> wrote:
> Anyway, I retested with compat-wireless-3.5 rc5 and I can see a complete
> hanging connection after 3s of running netperf with
> 0011-Revert-rt2x00-Don-t-let-mac80211-send-a-BAR-when-an-.patch (2.4
> GHz, 40MHz) - the original problem and the reason for the patch.
>
> Maybe we should distinguish between AP and STA? Or is it a device
> specific problem? I'm not sure. Helmut mentioned here that it could be a
> hardware issue, too:
> http://news.gmane.org/find-root.php?group=gmane.linux.kernel.wireless.general&article=83767

If I remember correctly the hardware will always report BAR frames as
un-acked even if a BlockAck is received as response to the BAR. This
leads to mac80211 resending the BAR.

Maybe just reporting BAR TX status as "acked" works around this issue ...

Helmut




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