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Message-ID: <ea1507a76adb346dc46c934d2905ab055b0f9236.camel@sipsolutions.net>
Subject: Re: BUG: deadlock on flushing mgmt registrations update work
From:   Johannes Berg <johannes@sipsolutions.net>
To:     Markus Theil <markus.theil@tu-ilmenau.de>,
        linux-wireless@vger.kernel.org
Date:   Wed, 03 Jun 2020 16:13:44 +0200
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On Wed, 2020-06-03 at 16:10 +0200, Markus Theil wrote:
> While running hostapd tests, the following deadlock showed up:
> 
> cfg80211_mgmt_registrations_update_wk locks the rtnl lock, which
> is already hold by nl80211 when going into __cfg80211_unregister_wdev,
> which flushes cfg80211_mgmt_registrations_update_wk.

Hah, at least the work item lockdep detection is still working ;)

(just the other day I was telling someone the story of how I added that)

I'll take a look tomorrow.

johannes