From: Johannes Berg <johannes@sipsolutions.net>
To: Arik Nemtsov <arik@wizery.com>
Cc: linux-wireless@vger.kernel.org, Luciano Coelho <coelho@ti.com>
Subject: Re: [PATCH 02/10] wl12xx: AP-mode - fix race condition on sta connection
Date: Wed, 26 Jan 2011 22:54:17 +0100 [thread overview]
Message-ID: <1296078857.3635.41.camel@jlt3.sipsolutions.net> (raw)
In-Reply-To: <AANLkTinwt64DRvMT5E5+o9a4co0LzdxJ+c1c9DUOWOZe@mail.gmail.com>
On Wed, 2011-01-26 at 23:44 +0200, Arik Nemtsov wrote:
> Well no it doesn't do that. But the FW takes some time to know its
> authenticated.
> The flow is this:
>
> 1. hostapd sends auth complete (the FW doesn't know anything about this)
you mean assoc, right?
> 2. The STA transmits something
> 3. The AP FW deauths the STA
> 4. hostapd adds the station, causing mac80211 to call add_sta(), which
> causes the FW to add the sta
>
> Then we have an endless loop of sta add/remove..
I'd wondered about that race condition before -- maybe hostapd should
add the station before sending the assoc complete. The race also exists
in practice with just mac80211, except it only leads to a dropped frame.
johannes
next prev parent reply other threads:[~2011-01-26 21:54 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-16 5:42 [PATCH 00/10] wl12xx: AP-mode per link PSM Arik Nemtsov
2011-01-16 5:42 ` [PATCH 01/10] wl12xx: fix potential race condition with TX queue watermark Arik Nemtsov
2011-01-16 5:42 ` [PATCH 02/10] wl12xx: AP-mode - fix race condition on sta connection Arik Nemtsov
2011-01-26 14:01 ` Luciano Coelho
2011-01-26 20:04 ` Arik Nemtsov
2011-01-26 21:28 ` Luciano Coelho
2011-01-26 21:33 ` Johannes Berg
2011-01-26 21:44 ` Arik Nemtsov
2011-01-26 21:54 ` Johannes Berg [this message]
2011-01-26 22:02 ` Arik Nemtsov
2011-01-26 22:08 ` Johannes Berg
2011-01-26 22:16 ` Arik Nemtsov
2011-01-26 23:11 ` Johannes Berg
2011-01-27 0:20 ` Jouni Malinen
2011-01-27 8:21 ` Johannes Berg
2011-01-16 5:42 ` [PATCH 03/10] wl12xx: AP-mode - TX queue per link in AC Arik Nemtsov
2011-01-16 5:42 ` [PATCH 04/10] mac80211: do not calc frame duration when using HW rate-control Arik Nemtsov
2011-01-16 8:34 ` Johannes Berg
2011-01-16 5:42 ` [PATCH 05/10] wl12xx: report invalid TX rate when returning non-TX-ed skbs Arik Nemtsov
2011-01-27 9:51 ` Luciano Coelho
2011-01-27 10:33 ` Johannes Berg
2011-01-30 6:57 ` Arik Nemtsov
2011-01-16 5:42 ` [PATCH 06/10] mac80211: add HW flag for disabling auto link-PS in AP mode Arik Nemtsov
2011-01-16 8:50 ` Johannes Berg
[not found] ` <AANLkTik=WDsehr0EgW7QemfdmokvaLzg1ugASwiuCOXt@mail.gmail.com>
2011-01-16 21:53 ` Fwd: " Arik Nemtsov
2011-01-17 9:35 ` Johannes Berg
2011-01-17 22:47 ` Arik Nemtsov
2011-01-18 9:05 ` Johannes Berg
2011-01-18 19:17 ` Arik Nemtsov
2011-01-27 11:39 ` Luciano Coelho
2011-01-16 5:42 ` [PATCH 07/10] wl12xx: AP-mode - support HW based link PS monitoring Arik Nemtsov
2011-01-27 11:41 ` Luciano Coelho
2011-01-16 5:42 ` [PATCH 08/10] wl12xx: AP mode - fix bug in cleanup of wl1271_op_sta_add() Arik Nemtsov
2011-01-16 5:42 ` [PATCH 09/10] wl12xx: AP-mode - count free FW TX blocks per link Arik Nemtsov
2011-01-16 5:42 ` [PATCH 10/10] wl12xx: AP-mode - management of links in PS-mode Arik Nemtsov
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