From: Johannes Berg <johannes@sipsolutions.net>
To: Michal Kazior <michal.kazior@tieto.com>
Cc: linux-wireless <linux-wireless@vger.kernel.org>,
Luca Coelho <luca@coelho.fi>
Subject: Re: [PATCH v6 4/6] mac80211: use chanctx reservation for AP CSA
Date: Fri, 23 May 2014 11:07:54 +0200 [thread overview]
Message-ID: <1400836074.4358.12.camel@jlt4.sipsolutions.net> (raw)
In-Reply-To: <CA+BoTQnLPEqTnyr98TmDETP_iBOAza_XLZ53Jd+GdG6sRc3=5Q@mail.gmail.com> (sfid-20140523_105832_059803_80C652EC)
On Fri, 2014-05-23 at 10:58 +0200, Michal Kazior wrote:
> If you keep on beaconing for too long on a DFS channel after detecting
> a radar you risk breaking local law (ETSI and FCC specify quiescing
> periods).
Yes, this is true.
> > You could technically just return NULL in this period, but I don't know
> > how well drivers would cope with that (though technically they have to
> > cope with it due to memory allocation failures anyway)
>
> Sounds good to me.
>
> I guess you'd use ieee80211_csa_is_complete (or
> ieee80211_csa_update_counter) for template-based drivers to stop
> beaconing.
The thing is, I don't see that template based drivers would be able to
stop beaconing :-)
This whole design that requires it seems a bit fishy to start with, so I
can't really imagine anyone writing firmware that supports it. That
said, ours only supports a single beacon at a time anyway, so we'll
switch immediately and don't have to do that anyway.
johannes
next prev parent reply other threads:[~2014-05-23 9:08 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-22 14:07 [PATCH v6 0/6] cfg/mac80211: implement multi-vif csa Michal Kazior
2014-05-22 14:07 ` [PATCH v6 1/6] mac80211: introduce switch_vif_chanctx op Michal Kazior
2014-05-22 14:45 ` Johannes Berg
2014-05-23 2:38 ` [PATCH] mac80211: add a single-transaction driver op to switch contexts Luca Coelho
2014-05-23 2:49 ` Luca Coelho
2014-05-23 7:51 ` Michal Kazior
2014-05-23 8:01 ` Michal Kazior
2014-05-23 8:58 ` Johannes Berg
2014-05-23 9:14 ` Luca Coelho
2014-05-23 9:30 ` Johannes Berg
2014-05-23 9:52 ` Johannes Berg
2014-05-23 11:33 ` [PATCH 1/2] " Luca Coelho
2014-05-23 11:33 ` [PATCH 2/2] mac80211: use switch_vif_chanctx to change a running chanctx Luca Coelho
2014-05-23 11:35 ` Luca Coelho
2014-05-23 13:28 ` Johannes Berg
2014-05-23 13:31 ` Luca Coelho
2014-05-23 13:24 ` [PATCH 1/2] mac80211: add a single-transaction driver op to switch contexts Johannes Berg
2014-05-23 13:30 ` Luca Coelho
2014-05-23 9:16 ` [PATCH] " Michal Kazior
2014-05-23 9:26 ` Johannes Berg
2014-05-23 6:09 ` [PATCH v6 1/6] mac80211: introduce switch_vif_chanctx op Michal Kazior
2014-05-23 8:51 ` Johannes Berg
2014-05-23 9:10 ` Michal Kazior
2014-05-23 9:31 ` Johannes Berg
2014-05-22 14:07 ` [PATCH v6 2/6] mac80211: implement multi-vif in-place reservations Michal Kazior
2014-05-22 14:51 ` Johannes Berg
2014-05-23 6:16 ` Michal Kazior
2014-05-23 12:23 ` Michal Kazior
2014-05-23 13:14 ` Johannes Berg
2014-05-22 14:07 ` [PATCH v6 3/6] mac80211: make check_combinations() aware of chanctx reservation Michal Kazior
2014-05-22 14:07 ` [PATCH v6 4/6] mac80211: use chanctx reservation for AP CSA Michal Kazior
2014-05-22 14:54 ` Johannes Berg
2014-05-23 6:49 ` Michal Kazior
2014-05-23 8:44 ` Johannes Berg
2014-05-23 8:58 ` Michal Kazior
2014-05-23 9:07 ` Johannes Berg [this message]
2014-05-23 9:35 ` Michal Kazior
2014-05-23 9:53 ` Johannes Berg
2014-05-22 14:07 ` [PATCH v6 5/6] mac80211: use chanctx reservation for STA CSA Michal Kazior
2014-05-22 14:07 ` [PATCH v6 6/6] cfg80211: remove channel_switch combination check Michal Kazior
2014-05-22 14:57 ` Johannes Berg
2014-05-23 7:04 ` Michal Kazior
2014-05-23 8:53 ` Johannes Berg
2014-05-23 9:11 ` Michal Kazior
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