Re: [PATCH] mac80211: support FTM responder configuration/statistics

[Johannes Berg]

Hi Pradeep,

On Wed, 2018-10-03 at 20:19 -0700, Pradeep Kumar Chitrapu wrote:
> New bss param ftm_responder is used to notify the driver to
> enable fine timing request (FTM) responder role in AP mode.

I just realized that this is broken in nl80211_channel_switch() and
ieee80211_set_csa_beacon(), doing a CSA will always disable FTM unless
it was actually included in the new configuration.

Doing the trivial thing:

        memset(&params, 0, sizeof(params));
+       params.beacon_after.ftm_responder = -1;

in nl80211_channel_switch() will not help because then mac80211 will
lose all the extra configuration, and will actually store -1 into its
enabled value which is really strange.

I'd appreciate if you could take a look at this.

Thanks,
johannes