netdev - Re: Hang on wireless removal..

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Message-ID: <8242a0fbe56f44f81952ee3c009d646d79b4e366.camel@sipsolutions.net>
Date:   Mon, 08 Jun 2020 09:15:37 +0200
From:   Johannes Berg <johannes@...solutions.net>
To:     sedat.dilek@...il.com
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        linux-wireless <linux-wireless@...r.kernel.org>,
        Netdev <netdev@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: Hang on wireless removal..

On Mon, 2020-06-08 at 09:14 +0200, Sedat Dilek wrote:
> On Sat, Jun 6, 2020 at 9:56 AM Johannes Berg <johannes@...solutions.net> wrote:
> > Hi, sorry for the top post, on my phone.
> > 
> > Yes, your analysis is spot on I think. I've got a fix for this in my
> > jberg/mac80211 tree, there's a deadlock with a work struct and the
> > rtnl.
> > 
> > Sorry about that. My testing should've caught it, but that exact
> > scenario didn't happen, and lockdep for disabled due to some
> > unrelated issues at early boot,so this didn't show up... (I also
> > sent fixes for the other issue in user mode Linux)
> > 
> 
> Is that the fix you are talking about?
> 
> commit 79ea1e12c0b8540100e89b32afb9f0e6503fad35
> "cfg80211: fix management registrations deadlock"

Right. I only have two fixes in that tree ;)

I'll see if I have anything else, and send it off to davem later.

johannes