Return-path: Received: from mail.candelatech.com ([208.74.158.172]:43311 "EHLO ns3.lanforge.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755318Ab2LLWIc (ORCPT ); Wed, 12 Dec 2012 17:08:32 -0500 Message-ID: <50C9005A.4000805@candelatech.com> (sfid-20121212_230835_864883_7AF17847) Date: Wed, 12 Dec 2012 14:08:26 -0800 From: Ben Greear MIME-Version: 1.0 To: Johannes Berg CC: linux-wireless@vger.kernel.org Subject: Re: [RFC 4/6] mac80211: Allow disabling SGI-20. References: <1355349295-30960-1-git-send-email-greearb@candelatech.com> <1355349295-30960-4-git-send-email-greearb@candelatech.com> (sfid-20121212_225648_739548_AE867F17) <1355349972.9708.20.camel@jlt4.sipsolutions.net> In-Reply-To: <1355349972.9708.20.camel@jlt4.sipsolutions.net> Content-Type: text/plain; charset=UTF-8; format=flowed Sender: linux-wireless-owner@vger.kernel.org List-ID: On 12/12/2012 02:06 PM, Johannes Berg wrote: > On Wed, 2012-12-12 at 13:54 -0800, greearb@candelatech.com wrote: >> From: Ben Greear >> >> This allows user-space (wpa_supplicant) to disable >> short guard interval (SGI) for 20Mhz. The SGI-40 >> disable option is already handled. >> >> Signed-off-by: Ben Greear >> --- >> net/mac80211/ht.c | 3 +++ >> 1 files changed, 3 insertions(+), 0 deletions(-) >> >> diff --git a/net/mac80211/ht.c b/net/mac80211/ht.c >> index a71d891..8a6d68f 100644 >> --- a/net/mac80211/ht.c >> +++ b/net/mac80211/ht.c >> @@ -62,6 +62,9 @@ void ieee80211_apply_htcap_overrides(struct ieee80211_sub_if_data *sdata, >> __check_htcap_disable(sdata, ht_cap, IEEE80211_HT_CAP_SUP_WIDTH_20_40); >> __check_htcap_disable(sdata, ht_cap, IEEE80211_HT_CAP_SGI_40); >> >> + /* Allow user to disable SGI-20 (SGI-40 is handled above) */ >> + __check_htcap_disable(sdata, ht_cap, IEEE80211_HT_CAP_SGI_20); > > And you tested this? And it actually did something, despite > mac80211_ht_capa_mod_mask not including it?? I thought it was working, but perhaps I was wrong. I will re-test. Thanks, Ben > > johannes > -- Ben Greear Candela Technologies Inc http://www.candelatech.com