From: Johannes Berg <johannes@sipsolutions.net>
To: Ben Greear <greearb@candelatech.com>
Cc: "linux-wireless@vger.kernel.org" <linux-wireless@vger.kernel.org>
Subject: Re: Why is wmm_param required for HT40- in mlme.c
Date: Mon, 31 Jan 2011 12:03:11 +0100 [thread overview]
Message-ID: <1296471791.3812.7.camel@jlt3.sipsolutions.net> (raw)
In-Reply-To: <4D45A128.6060905@candelatech.com>
On Sun, 2011-01-30 at 09:34 -0800, Ben Greear wrote:
> On 01/30/2011 01:36 AM, Johannes Berg wrote:
> > On Sat, 2011-01-29 at 21:38 -0800, Ben Greear wrote:
> >> I tried to set up hostapd to do HT40-, but for whatever reason,
> >> it's not sending any wmm_param options, so the stations will not
> >> associate with HT40- enabled due to the check below.
> >>
> >> Is it really *reqired* that wmm_param exist to enable HT mode?
> >>
> >> From mlme.c:
> >> if (elems.ht_info_elem&& elems.wmm_param&&
> >> (sdata->local->hw.queues>= 4)&&
> >> !(ifmgd->flags& IEEE80211_STA_DISABLE_11N))
> >> changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
> >> cbss->bssid, ap_ht_cap_flags);
> >
> > 802.11n-2009 says it is required.
>
> Do you know the pertinent section, or some keywords to search for? I'm
> unable to find anything useful.
No, I got confused. 802.11n says an HT STA is a QoS STA (5.2.9), but in
practice WMM is tested/certified instead of QoS.
johannes
next prev parent reply other threads:[~2011-01-31 11:03 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-30 5:38 Why is wmm_param required for HT40- in mlme.c Ben Greear
2011-01-30 9:36 ` Johannes Berg
2011-01-30 17:34 ` Ben Greear
2011-01-31 11:03 ` Johannes Berg [this message]
2011-01-31 17:35 ` Ben Greear
2011-01-31 17:40 ` Johannes Berg
2011-01-30 17:41 ` Pat Erley
2011-01-31 11:28 ` Jouni Malinen
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