diff options
| author | Johannes Berg <johannes@sipsolutions.net> | 2010-05-05 13:28:27 (GMT) |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2010-05-07 18:55:51 (GMT) |
| commit | 0aaffa9b9699894aab3266195a529baf9f96ac29 (patch) | |
| tree | 26fe5f5277ac6d7061ea723f92d4038b0c28b0b8 /net/mac80211/cfg.c | |
| parent | f444de05d20e27cdd960c13fcbcfca3099f03143 (diff) | |
| download | linux-0aaffa9b9699894aab3266195a529baf9f96ac29.tar.xz | |
mac80211: improve HT channel handling
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>
Diffstat (limited to 'net/mac80211/cfg.c')
| -rw-r--r-- | net/mac80211/cfg.c | 23 |
1 files changed, 17 insertions, 6 deletions
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index 414b7dd..ab166c6 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -1166,23 +1166,34 @@ static int ieee80211_set_channel(struct wiphy *wiphy, enum nl80211_channel_type channel_type) { struct ieee80211_local *local = wiphy_priv(wiphy); + struct ieee80211_sub_if_data *sdata = NULL; + + if (netdev) + sdata = IEEE80211_DEV_TO_SUB_IF(netdev); switch (ieee80211_get_channel_mode(local, NULL)) { case CHAN_MODE_HOPPING: return -EBUSY; case CHAN_MODE_FIXED: - if (local->oper_channel == chan && - local->oper_channel_type == channel_type) + if (local->oper_channel != chan) + return -EBUSY; + if (!sdata && local->_oper_channel_type == channel_type) return 0; - return -EBUSY; + break; case CHAN_MODE_UNDEFINED: break; } local->oper_channel = chan; - local->oper_channel_type = channel_type; - return ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL); + if (!ieee80211_set_channel_type(local, sdata, channel_type)) + return -EBUSY; + + ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL); + if (sdata && sdata->vif.type != NL80211_IFTYPE_MONITOR) + ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_HT); + + return 0; } #ifdef CONFIG_PM @@ -1406,7 +1417,7 @@ int __ieee80211_request_smps(struct ieee80211_sub_if_data *sdata, * association, there's no need to send an action frame. */ if (!sdata->u.mgd.associated || - sdata->local->oper_channel_type == NL80211_CHAN_NO_HT) { + sdata->vif.bss_conf.channel_type == NL80211_CHAN_NO_HT) { mutex_lock(&sdata->local->iflist_mtx); ieee80211_recalc_smps(sdata->local, sdata); mutex_unlock(&sdata->local->iflist_mtx); |