RX rate is wrong in 5.10? (bisected to: mac80211: receive and process S1G beacons)

[Thomas Pedersen]

Hi Ben,

On 2021-01-04 16:18, Ben Greear wrote:
> On 1/4/21 8:18 AM, Ben Greear wrote:
>> Hello,
>> 
>> I noticed that RX rate is always 6Mbps when I use -ct firmware and -ct 
>> driver in
>> 5.10, and on stock 5.10.0 driver and stock firmware, rx-rate does not 
>> show up at
>> all in 'iw dev wlan1 station dump'.
>> 
>> I'm using 9984 NIC...
>> 
>> Anyone else see this?
> 
> After a bisect, the first bad commit shows this:
> 
> commit 09a740ce352e1a1d16b9984115514ba9a4f4704b (refs/bisect/bad)
> Author: Thomas Pedersen <thomas at adapt-ip.com>
> Date:   Mon Sep 21 19:28:14 2020 -0700
> 
>     mac80211: receive and process S1G beacons
> 
>     S1G beacons are 802.11 Extension Frames, so the fixed
>     header part differs from regular beacons.
> 
>     Add a handler to process S1G beacons and abstract out the
>     fetching of BSSID and element start locations in the
>     beacon body handler.
> 
>     Signed-off-by: Thomas Pedersen <thomas at adapt-ip.com>
>     Link: 
> https://lore.kernel.org/r/20200922022818.15855-14-thomas@adapt-ip.com
>     [don't rename, small coding style cleanups]
>     Signed-off-by: Johannes Berg <johannes.berg at intel.com>
> 
> From a glance through the diff, I'm at a loss as to why it causes the
> symptom.  I manually
> double-checked the bisect, an it appears correct.
> 
> What I see is that in the commit before this, I see a useful rx rate
> (1.3Gbps for instance)
> in 'iw dev wlan1 station dump', but in this bad commit, both show
> 6Mbps rate.  (Tx rate
> in ath10k is probably broken for other reasons, so I only bisected the
> rx side issue.)
> 
> I'm using ath10k 9984 radio with firmware 10.4-3.9.0.2-00070 in station 
> mode.
> 
> AP is an ath11k Hawkeye...
> 
> I'm using a 1Mbps UDP packet 'download' stream to make sure I'm seeing
> rates for data frames
> and not just management frames.

Sorry about that.

> Any idea what might be the issue?

It may be fixed by 
https://patchwork.kernel.org/project/linux-wireless/patch/1607483189-3891-1-git-send-email-wgong@codeaurora.org/

-- 
thomas