netdev - Re: [PATCH v2] 802.11n IBSS: wlan0 stops receiving packets due to aggregation after sender reboot

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Message-ID: <6967a862-c040-565a-3644-c804b188d13e@ncentric.com>
Date:   Tue, 29 Oct 2019 10:47:07 +0100
From:   Koen Vandeputte <koen.vandeputte@...ntric.com>
To:     Johannes Berg <johannes@...solutions.net>,
        Krzysztof Hałasa <khalasa@...p.pl>
Cc:     "David S. Miller" <davem@...emloft.net>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] 802.11n IBSS: wlan0 stops receiving packets due to
 aggregation after sender reboot


On 29.10.19 10:03, Johannes Berg wrote:
> On Tue, 2019-10-29 at 09:41 +0100, Koen Vandeputte wrote:
>
>> I can confirm the issue as I'm also seeing this sometimes in the field here.
>>
>> Sometimes when a devices goes out of range and then re-enters,
>> the link refuses to "come up", as in rx looks to be "stuck" without any
>> reports in system log or locking issues (lockdep enabled)
> Right. I've recently debugged this due to issues in distributed
> beaconing (rather than moving in/out of range), but I guess it would be
> relatively simple to reproduce this with wmediumd, if that can be
> controlled dynamically?
>
> What kernel are you running? You could check if you have
>
> 95697f9907bf ("mac80211: accept deauth frames in IBSS mode")
> 4b08d1b6a994 ("mac80211: IBSS: send deauth when expiring inactive STAs")
>
> which might help somewhat, but don't fully cover the case of moving out
> of range.
>
> johannes
>
I'm running OpenWrt (kernel 4.14.150 with 4.19.79 mac80211)
I noticed these fixes last week and made a build 2 days ago with them 
backported to it.
Running in the field on roughly 4 devices since a day.

Koen