linux-kernel - Re: [PATCH 2/3] mac80211: Add support to trigger sta disconnect on hardware restart

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Date:   Fri, 12 Feb 2021 09:44:02 +0100
From:   Johannes Berg <johannes@...solutions.net>
To:     Youghandhar Chintala <youghand@...eaurora.org>
Cc:     davem@...emloft.net, kuba@...nel.org,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, kuabhs@...omium.org,
        dianders@...omium.org, briannorris@...omium.org,
        pillair@...eaurora.org
Subject: Re: [PATCH 2/3] mac80211: Add support to trigger sta disconnect on
 hardware restart

On Fri, 2021-02-12 at 09:42 +0100, Johannes Berg wrote:
> On Tue, 2020-12-15 at 22:53 +0530, Youghandhar Chintala wrote:
> > The right fix would be to pull the entire data path into the host
> > +++ b/net/mac80211/ieee80211_i.h
> > @@ -748,6 +748,8 @@ struct ieee80211_if_mesh {
> >   *	back to wireless media and to the local net stack.
> >   * @IEEE80211_SDATA_DISCONNECT_RESUME: Disconnect after resume.
> >   * @IEEE80211_SDATA_IN_DRIVER: indicates interface was added to driver
> > + * @IEEE80211_SDATA_DISCONNECT_HW_RESTART: Disconnect after hardware restart
> > + *	recovery
> 
> How did you model this on IEEE80211_SDATA_DISCONNECT_RESUME, but than
> didn't check how that's actually used?
> 
> Please change it so that the two models are the same. You really don't
> need the wiphy flag.

In fact, you could even simply
generalize IEEE80211_SDATA_DISCONNECT_RESUME
and ieee80211_resume_disconnect() to _reconfig_ instead of _resume_, and
call it from the driver just before requesting HW restart.

johannes