Date:   Mon, 4 Mar 2019 13:45:08 +0100
From:   Stanislaw Gruszka <sgruszka@redhat.com>
To:     Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Cc:     Felix Fietkau <nbd@nbd.name>, linux-wireless@vger.kernel.org
Subject: Re: [PATCH 11/11] mt76x02: enable AP mode for USB
Message-ID: <20190304124507.GA11047@redhat.com>
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 <20190304110427.GA2008@redhat.com>
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On Mon, Mar 04, 2019 at 12:08:48PM +0100, Lorenzo Bianconi wrote:
> > How this should be done ? Is sufficient to check IEEE80211_CHAN_RADAR
> > and mt76_is_usb() on set channel end return -EINVAL error ? Or different
> > way ?
> 
> Re-reading my email I was not so clear, sorry. I mean we need to clear
> radar_detect_widths for mt76_usb or as suggested by Felix to have a new
> iface_combinations for mt76_usb where we do not set radar_detect_widths

This seems to be already handled by mac80211 if we do not set
iface combinations. On channels like this:

		Frequencies:
			* 5180 MHz [36] (23.0 dBm)
			* 5200 MHz [40] (23.0 dBm)
			* 5220 MHz [44] (23.0 dBm)
			* 5240 MHz [48] (23.0 dBm)
			* 5260 MHz [52] (23.0 dBm) (radar detection)
			  DFS state: usable (for 37 sec)
			* 5280 MHz [56] (23.0 dBm) (radar detection)
			  DFS state: usable (for 37 sec)
			* 5300 MHz [60] (23.0 dBm) (radar detection)
			  DFS state: usable (for 37 sec)
			* 5320 MHz [64] (23.0 dBm) (radar detection)


Hostap fails on channel=52 with error:

Mar 04 13:39:33 dhcp-27-155.brq.redhat.com hostapd[10902]: wlan0: IEEE 802.11 Configured channel (52) not found from the channel list of current mode (2) IEEE 802.11a
Mar 04 13:39:33 dhcp-27-155.brq.redhat.com hostapd[10902]: channel [4] (52) is disabled for use in AP mode, flags: 0x79 RADAR

On channel=36 hostapd succeed to start.

Stanislaw