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Date: Sun, 8 Feb 2015 12:57:44 +0200
Message-ID: <CAB3XZEfJt=YKP8+SKie7L_4sdxcdrGUtzruDvrjFKDvXKo2L3w@mail.gmail.com> (sfid-20150208_115757_883211_7A175F84)
Subject: Re: [PATCH v2 3/3] mac80211: don't defer scans in case of radar detection
From: Eliad Peller <eliad@wizery.com>
To: Janusz Dziedzic <janusz.dziedzic@tieto.com>
Cc: Jouni Malinen <j@w1.fi>,
	"linux-wireless@vger.kernel.org" <linux-wireless@vger.kernel.org>
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On Sat, Feb 7, 2015 at 9:17 PM, Janusz Dziedzic
<janusz.dziedzic@tieto.com> wrote:
> BTW, what in case we will start AP on first interface (DFS channel),
> on second one we will try to connect to other AP. As I understand this
> correctly, second iface (STA iface) will not allow to scan (connect)
> ...?
>
right.
The rationale behind it that you must listen constantly to detect
radar events, which prevents scanning off-channel.
(i guess an exception for on-channel scanning can be added if needed, though)

> Other case, what if we start DFS AP and allow to scan in AP mode (eg
> for ACS purpose, allow to choose better channel and do CSA ...)?
ditto. you just have to make sure you keep listening on the operating channel.

Eliad.