On Wed, Nov 15, 2023 at 01:06:16PM +0100, Johannes Berg wrote:
> From: Johannes Berg <johannes.berg@xxxxxxxxx>
>
> Given all the locking rework in mac80211, we pretty much
> need to get into the driver with the wiphy mutex held in
> all callbacks. This is already mostly the case, but as
> Johan reported, in the get_txpower it may not be true.
>
> Lock the wiphy mutex around nl80211_send_iface(), then
> is also around callers of nl80211_notify_iface(). This
> is easy to do, fixes the problem, and aligns the locking
> between various calls to it in different parts of the
> code of cfg80211.
>
> Fixes: 0e8185ce1dde ("wifi: mac80211: check wiphy mutex in ops")
> Reported-by: Johan Hovold <johan@xxxxxxxxxx>
> Closes: https://lore.kernel.org/r/ZVOXX6qg4vXEx8dX@xxxxxxxxxxxxxxxxxxxx
> Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
Thanks for the quick fix. With this I no longer see any lockdep splat on
boot with the X13s:
Tested-by: Johan Hovold <johan+linaro@xxxxxxxxxx>
Johan
