On 4/23/20 11:13 AM, Johannes Berg wrote:
> From: Johannes Berg <johannes.berg@xxxxxxxxx>
>
> When fixing the initialization race, we neglected to account for
> the fact that debugfs is initialized in wiphy_register(), and
> some debugfs things went missing (or rather were rerooted to the
> global debugfs root).
>
> Fix this by adding debugfs entries only after wiphy_register().
> This requires some changes in the rate control code since it
> currently adds debugfs at alloc time, which can no longer be
> done after the reordering.
>
> Reported-by: Jouni Malinen <j@xxxxx>
> Reported-by: kernel test robot <rong.a.chen@xxxxxxxxx>
> Reported-by: Hauke Mehrtens <hauke@xxxxxxxxxx>
> Reported-by: Felix Fietkau <nbd@xxxxxxxx>
> Fixes: 52e04b4ce5d0 ("mac80211: fix race in ieee80211_register_hw()")
> Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
Tested-by: Hauke Mehrtens <hauke@xxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
This should be backported to stable as the patch which causes these
problems was backported too.
Hauke
