Re: [Linux 5.18-rc1] WARNING: possible circular locking dependency detected at (rtw_ops_config, ieee80211_mgd_probe_ap)

[Johannes Berg]

On Thu, 2022-04-07 at 08:26 +0700, Ammar Faizi wrote:
> 
> [21860.955836]  Possible unsafe locking scenario:
> 
> [21860.955837]        CPU0                    CPU1
> [21860.955837]        ----                    ----
> [21860.955838]   lock(&local->iflist_mtx);
> [21860.955839]                                lock(&rtwdev->mutex);
> [21860.955840]                                lock(&local->iflist_mtx);
> [21860.955841]   lock(&rtwdev->mutex);
> [21860.955842]
>                   *** DEADLOCK ***
> 

The driver needs to fix this, cannot call ieee80211_iterate_interfaces()
inside a section locked this way. I _think_ this deadlock used to be
documented by it looks like that documentation got moved around or
something.

johannes