[PATCH AUTOSEL 4.14 62/66] mac80211: Fix calculation of minimal channel width

Sasha Levin
2020-12-23T02:37:08Z

From: Ilan Peer <ilan.peer@intel.com>

[ Upstream commit bbf31e88df2f5da20ce613c340ce508d732046b3 ]

When calculating the minimal channel width for channel context,
the current operation Rx channel width of a station was used and not
the overall channel width capability of the station, i.e., both for
Tx and Rx.

Fix ieee80211_get_sta_bw() to use the maximal channel width the
station is capable. While at it make the function static.

Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20201206145305.4387040b99a0.I74bcf19238f75a5960c4098b10e355123d933281@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/mac80211/chan.c | 10 ++++++----
net/mac80211/ieee80211_i.h | 1 -
2 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/net/mac80211/chan.c b/net/mac80211/chan.c
index 89178b46b32fa..6a25be5eb1e7e 100644
--- a/net/mac80211/chan.c
+++ b/net/mac80211/chan.c
@@ -190,11 +190,13 @@ ieee80211_find_reservation_chanctx(struct ieee80211_local *local,
return NULL;
}

-enum nl80211_chan_width ieee80211_get_sta_bw(struct ieee80211_sta *sta)
+static enum nl80211_chan_width ieee80211_get_sta_bw(struct sta_info *sta)
{
- switch (sta->bandwidth) {
+ enum ieee80211_sta_rx_bandwidth width = ieee80211_sta_cap_rx_bw(sta);
+
+ switch (width) {
case IEEE80211_STA_RX_BW_20:
- if (sta->ht_cap.ht_supported)
+ if (sta->sta.ht_cap.ht_supported)
return NL80211_CHAN_WIDTH_20;
else
return NL80211_CHAN_WIDTH_20_NOHT;
@@ -231,7 +233,7 @@ ieee80211_get_max_required_bw(struct ieee80211_sub_if_data *sdata)
!(sta->sdata->bss && sta->sdata->bss == sdata->bss))
continue;

- max_bw = max(max_bw, ieee80211_get_sta_bw(&sta->sta));
+ max_bw = max(max_bw, ieee80211_get_sta_bw(sta));
}
rcu_read_unlock();

diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index 0e209a88d88a7..2be55a90ee0bd 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -2129,7 +2129,6 @@ int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
enum ieee80211_chanctx_mode chanmode,
u8 radar_detect);
int ieee80211_max_num_channels(struct ieee80211_local *local);
-enum nl80211_chan_width ieee80211_get_sta_bw(struct ieee80211_sta *sta);
void ieee80211_recalc_chanctx_chantype(struct ieee80211_local *local,
struct ieee80211_chanctx *ctx);

--
2.27.0