From: Johannes Berg <johannes@sipsolutions.net>
To: Masashi Honma <masashi.honma@gmail.com>
Cc: linux-wireless@vger.kernel.org, me@bobcopeland.com
Subject: Re: [PATCH v5] mac80211: Allow 0 for NL80211_MESHCONF_PLINK_TIMEOUT to disable STA expiration
Date: Tue, 24 Feb 2015 21:08:28 +0100 [thread overview]
Message-ID: <1424808508.2192.38.camel@sipsolutions.net> (raw)
In-Reply-To: <1424785336-3268-1-git-send-email-masashi.honma@gmail.com> (sfid-20150224_144229_413961_1475FA92)
On Tue, 2015-02-24 at 22:42 +0900, Masashi Honma wrote:
> Both wpa_supplicant and mac80211 has inactivity timer. By default
> wpa_supplicant will be timed out in 5 minutes and mac80211's it is 30 minutes.
> If wpa_supplicant uses more long timer than mac80211, wpa_supplicant will get
> unexpected disconnection by mac80211. This patch adds functionality of disabling
> mac80211 inactivity timer to avoid to prevent wpa_supplicant inactivity timer.
>
> I have thought setting 0xffffffff to NL80211_MESHCONF_PLINK_TIMEOUT will solve
> this problem without this patch. But the approach does not work on 32 bit
> system. To explain the reason, I will show STA expiration rule in kernel. This
> is the expression.
>
> (current jiffies) > (frame Rx jiffies + NL80211_MESHCONF_PLINK_TIMEOUT * 250)
>
> On 32bit system, right side could be over flow and be unexpected small value if
> NL80211_MESHCONF_PLINK_TIMEOUT is sufficiently large. STA expiration occurs by
> this reason. So I made this patch.
Applied, I've reworded and rewrapped the commit log - in the future
please send commit logs with at most 72 characters per line.
johannes
next prev parent reply other threads:[~2015-02-24 20:08 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-16 5:17 [PATCH] mesh: Avoid STA expiration timer truncation to u32 Masashi Honma
2015-01-16 5:49 ` Kalle Valo
2015-01-16 6:12 ` Masashi Honma
2015-01-16 6:18 ` [PATCH v2] mac80211: " Masashi Honma
2015-01-16 13:31 ` Bob Copeland
2015-01-20 2:44 ` Masashi Honma
2015-01-20 2:47 ` [PATCH v3] " Masashi Honma
2015-01-23 9:42 ` Johannes Berg
2015-01-23 14:27 ` Masashi Honma
2015-02-04 2:22 ` [PATCH v4] mac80211: Allow 0 for NL80211_MESHCONF_PLINK_TIMEOUT to disable STA expiration Masashi Honma
2015-02-24 9:46 ` Johannes Berg
[not found] ` <CAFk-A4nyEvsaCah97ohnbLW7a0+GRbnuJGLyFkBLbpWVffn85w@mail.gmail.com>
2015-02-24 10:03 ` Fwd: " Masashi Honma
2015-02-24 13:42 ` [PATCH v5] " Masashi Honma
2015-02-24 20:08 ` Johannes Berg [this message]
2015-02-24 23:24 ` Masashi Honma
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