All of lore.kernel.org
 help / color / mirror / Atom feed
From: Arik Nemtsov <arik@wizery.com>
To: Johannes Berg <johannes@sipsolutions.net>
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: Thu, 27 Jan 2011 00:02:37 +0200	[thread overview]
Message-ID: <AANLkTikno8Aa3wKy1js62D3FLOZJUxPyuwYsQd+g8JBM@mail.gmail.com> (raw)
In-Reply-To: <1296078857.3635.41.camel@jlt3.sipsolutions.net>

On Wed, Jan 26, 2011 at 23:54, Johannes Berg <johannes@sipsolutions.net> wrote:
> 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?

Yea you're right. It's getting late I guess :)

>
>> 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.
>

Well it can still get dropped here. This just prevents the FW from
de-authenticating the STA.

Arik

  reply	other threads:[~2011-01-26 22:02 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
2011-01-26 22:02         ` Arik Nemtsov [this message]
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

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=AANLkTikno8Aa3wKy1js62D3FLOZJUxPyuwYsQd+g8JBM@mail.gmail.com \
    --to=arik@wizery.com \
    --cc=coelho@ti.com \
    --cc=johannes@sipsolutions.net \
    --cc=linux-wireless@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.