linux-kernel - Re: [PATCH AUTOSEL 5.4 06/16] wifi: mac80211: do not wake queues on a vif that is being stopped

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Date:   Fri, 9 Sep 2022 11:48:08 -0700
From:   Ben Greear <greearb@...delatech.com>
To:     Johannes Berg <johannes@...solutions.net>,
        Sasha Levin <sashal@...nel.org>, linux-kernel@...r.kernel.org,
        stable@...r.kernel.org
Cc:     Felix Fietkau <nbd@....name>,
        Toke Høiland-Jørgensen <toke@...nel.org>,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, linux-wireless@...r.kernel.org,
        netdev@...r.kernel.org
Subject: Re: [PATCH AUTOSEL 5.4 06/16] wifi: mac80211: do not wake queues on a
 vif that is being stopped

On 7/19/22 10:50 PM, Johannes Berg wrote:
> On Tue, 2022-07-19 at 18:58 -0700, Ben Greear wrote:
>> I think this one had a regression and needs another init-lock-early patch to keep from causing
>> problems?
>>
> 
> Yes, for now we should drop it from all stable trees. We'll re-assess
> the situation later if it's needed there or not, I guess.
> 
> johannes
> 

I think there is a second problem with this patch:

If I create multiple station vdevs (on mtk7916 radio, not sure that matters much or not),
and admin up a few of them, but leave remainder down, then the queues on the originally-down-vdevs
are never started and so tx-path-hang on those stations.

I am not sure the best way to fix this.

Thanks,
Ben

-- 
Ben Greear <greearb@...delatech.com>
Candela Technologies Inc  http://www.candelatech.com