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List:       linux-wireless
Subject:    Re: [PATCH 2/2] mac80211: make listen_interval be configurable by
From:       Helmut Schaa <hschaa () suse ! de>
Date:       2008-07-15 9:58:10
Message-ID: 20080715115810.nxudx5jrms8s4cko () imap ! suse ! de
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Am Di 15 Jul 2008 10:41:01 CEST schrieb Johannes Berg  
<johannes@sipsolutions.net>:

> Right, but it does make sense to advertise what we're using, and this
> patch just adds a strict "driver tells mac80211 what it's using" flow.
> That's mostly what I'm objecting to. If you were calling the variable
> "max_listen_interval" and having mac80211 send it back to the driver in
> the BSS config as bssconf->listen_interval, and, for now, simply use the
> max, I wouldn't have a problem with it.

Using "max_listen_interval" as default may possibly result in APs  
rejecting the association. At least the 802.11 spec defines a status  
code 51 with the description "Association denied because the  
ListenInterval is too large".

Maybe retrying the association with a lower listen interval could help  
here. Therefore I agree with Johannes that the decision about what  
value to actually use should be made in mac80211.

Helmut
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