AP mode firmware crash on QCA9880-BR4A

Michal Kazior michal.kazior at tieto.com
Mon Aug 3 22:19:55 PDT 2015

On 29 July 2015 at 11:18, Martin Blumenstingl
<martin.blumenstingl at googlemail.com> wrote:
> On Wed, Jul 29, 2015 at 9:38 AM, Michal Kazior <michal.kazior at tieto.com> wrote:
>> I can't get smart antenna out of my head at this point - it wasn't
>> supported in 10.1 firmware (which works with your device). However
>> 10.2 seems to report that your hardware itself isn't capable of it so
>> it shouldn't be a problem (in theory).
>> I guess you could try playing with the WMI_BCN_TX_REF_DEF_ANTENNA in
>> the driver and try things like: 0x1, 0x7, 0xf, 0xff, 0xff00, 0xffff,
>> 0xff0000, 0xffffff.
> I have tested the following values (while there were NO changes in
> ath10k_wmi_event_host_swba = my patch was reverted) and it's still
> crashing with all of them:
> 0x1, 0x3, 0x7, 0xf, 0xff, 0xff00, 0xffff, 0xff0000 and 0xffffff

Thanks for testing.

>> I doubt it'll help though. I guess other management frames would crash
>> firmware as well but I don't think they do. Can you verify that by
>> running scan from any station around to see if the ath10k AP responds
>> with a Probe Response and is hence visible in station's scan results,
>> please?
> I did that with my second patch applied (that skips sending beacons)
> and WMI_BCN_TX_REF_DEF_ANTENNA = 0. In this case the AP is *not*
> visible to other devices (I checked with two android phones, since
> those are the only other 5G ready devices I have at the moment).

It could be that your devices are not transmitting Probe Requests and
scan passively 5GHz channels due to their regulatory restrictions. Can
you try getting traces to confirm this, please?


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