From f38fd12fa7b7b98e158a9b31d388da34eef25c22 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Tue, 1 Dec 2009 18:29:42 +0100 Subject: mac80211: allow disabling 40MHz on 2.4GHz In some situations it is required that a system be configured with no support for 40 MHz channels in the 2.4 GHz band. Rather than imposing any such restrictions on everybody, allow configuration a system like that with a module parameter. It is writable at runtime but only takes effect at the time of the next association. Signed-off-by: Johannes Berg Signed-off-by: John W. Linville --- net/mac80211/mlme.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'net/mac80211/mlme.c') diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index 0a762a9ba4d..a7472c979c6 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -400,6 +400,12 @@ static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata, /* determine capability flags */ + if (ieee80211_disable_40mhz_24ghz && + sband->band == IEEE80211_BAND_2GHZ) { + cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; + cap &= ~IEEE80211_HT_CAP_SGI_40; + } + switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: if (flags & IEEE80211_CHAN_NO_HT40PLUS) { -- cgit v1.2.3