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mac80211: stop toggling IEEE80211_HT_CAP_SUP_WIDTH_20_40

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For VHT, many more bandwidth changes are possible. As a first
step, stop toggling the IEEE80211_HT_CAP_SUP_WIDTH_20_40 flag
in the HT capabilities and instead introduce a bandwidth field
indicating the currently usable bandwidth to transmit to the
station. Of course, make all drivers use it.

To achieve this, make ieee80211_ht_cap_ie_to_sta_ht_cap() get
the station as an argument, rather than the new capabilities,
so it can set up the new bandwidth field.

If the station is a VHT station and VHT bandwidth is in use,
also set the bandwidth accordingly.

Doing this allows us to get rid of the supports_40mhz flag as
the HT capabilities now reflect the true capability instead of
the current setting.

While at it, also fix ieee80211_ht_cap_ie_to_sta_ht_cap() to not
ignore HT cap overrides when MCS TX isn't supported (not that it
really happens...)

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg
2013-02-07 11:47:44 +01:00
parent 4a34215ef7
commit e1a0c6b3a4
27 changed files with 184 additions and 158 deletions
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6
net/mac80211/mesh_plink.c
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@@ -373,8 +373,7 @@ static void mesh_sta_info_init(struct ieee80211_sub_if_data *sdata,
if (elems->ht_cap_elem &&
sdata->vif.bss_conf.chandef.width != NL80211_CHAN_WIDTH_20_NOHT)
ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
elems->ht_cap_elem,
&sta->sta.ht_cap);
elems->ht_cap_elem, sta);
else
memset(&sta->sta.ht_cap, 0, sizeof(sta->sta.ht_cap));
@@ -383,8 +382,7 @@ static void mesh_sta_info_init(struct ieee80211_sub_if_data *sdata,
if (!(elems->ht_operation->ht_param &
IEEE80211_HT_PARAM_CHAN_WIDTH_ANY))
sta->sta.ht_cap.cap &=
~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
sta->sta.bandwidth = IEEE80211_STA_RX_BW_20;
ieee80211_ht_oper_to_chandef(sdata->vif.bss_conf.chandef.chan,
elems->ht_operation, &chandef);
if (sta->ch_width != chandef.width)