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mac80211: improve HT channel handling

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Currently, when one interface switches HT mode,
all others will follow along. This is clearly
undesirable, since the new one might switch to
no-HT while another one is operating in HT.

Address this issue by keeping track of the HT
mode per interface, and allowing only changes
that are compatible, i.e. switching into HT40+
is not possible when another interface is in
HT40-, in that case the second one needs to
fall back to HT20.

Also, to allow drivers to know what's going on,
store the per-interface HT mode (channel type)
in the virtual interface's bss_conf.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg
2010-05-05 15:28:27 +02:00
committed by John W. Linville
parent f444de05d2
commit 0aaffa9b96
8 changed files with 132 additions and 40 deletions
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5
net/mac80211/ibss.c
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@@ -102,7 +102,7 @@ static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
sdata->drop_unencrypted = capability & WLAN_CAPABILITY_PRIVACY ? 1 : 0;
local->oper_channel = chan;
local->oper_channel_type = NL80211_CHAN_NO_HT;
WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
sband = local->hw.wiphy->bands[chan->band];
@@ -910,7 +910,8 @@ int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
/* fix ourselves to that channel now already */
if (params->channel_fixed) {
sdata->local->oper_channel = params->channel;
sdata->local->oper_channel_type = NL80211_CHAN_NO_HT;
WARN_ON(!ieee80211_set_channel_type(sdata->local, sdata,
NL80211_CHAN_NO_HT));
}
if (params->ie) {