Re: iwlwifi: Reason 7 periodic disconnect

From: Emmanuel Grumbach <egrumbach@gmail.com>
To: "Laurențiu Nicola" <lnicola@dend.ro>
Cc: poma <pomidorabelisima@gmail.com>,
	Felix Fietkau <nbd@openwrt.org>, Dan Williams <dcbw@redhat.com>,
	linux-wireless <linux-wireless@vger.kernel.org>
Subject: Re: iwlwifi: Reason 7 periodic disconnect
Date: Wed, 22 Oct 2014 12:10:24 +0300	[thread overview]
Message-ID: <CANUX_P0LRRczVCSFR7RE5coaYFxwFXyqC90pdm=oVwEiEt-7zw@mail.gmail.com> (raw)
In-Reply-To: <1413921415.3763081.181696749.20A0A495@webmail.messagingengine.com>

On Tue, Oct 21, 2014 at 10:56 PM, Laurențiu Nicola <lnicola@dend.ro> wrote:
> Yep! `scb_timeout` is 60 on my router.
>
> On Tue, Oct 21, 2014, at 14:00, poma wrote:
>> On 21.10.2014 10:35, Felix Fietkau wrote:
>> > On 2014-10-21 10:23, Laurențiu Nicola wrote:
>> >> It's an ASUS RT-N66U running NEWD-2/K3X from r24160.
>> > This is a Broadcom based device, so it should behave in the same way as
>> > other APs/Routers running the Broadcom drivers.
>> > The driver should only send Reason 7 when receiving a PS-Poll, BlockAck,
>> > BlockAckReq or Action frame from a station that's not associated, so
>> > probably it has already kicked out your iwlwifi client earlier. Not sure
>> > why that doesn't show up in the log though.
>> >
>>
>> Whether this might refer to the Station Control Block Timeout value
>>
>> http://www.dd-wrt.com/wiki/index.php/Wl#scb_timeout
>> ...
>> scb_timeout
>>
>> AP only: inactivity timeout value for authenticated stas
>>

Actually, mac80211 should be probing the AP every 30 seconds but a
beacon might abort the probe...
Can you try something like this:

diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 75df184..c9db7cf 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -3295,7 +3295,8 @@ static void ieee80211_rx_mgmt_beacon(struct
ieee80211_sub_if_data *sdata,
        if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
                mlme_dbg_ratelimited(sdata,
                                     "cancelling AP probe due to a
received beacon\n");
-               ieee80211_reset_ap_probe(sdata);
+               pr_err("Not cancelling the probe to make sure the AP
hears us from time to time\n");
+               //ieee80211_reset_ap_probe(sdata);
        }

        /*



>>
>> poma
>>
>>
>> --
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