mac80211: backport upstream fixes

Backport most significant upstream fixes (excl. hwsim fixes)
Refreshed all patches.

Contains important fixes for CSA (Channel Switch Announcement)
and A-MSDU frames.

Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>

1 files changed, 96 insertions, 0 deletions

diff --git a/package/kernel/mac80211/patches/391-mac80211-Fix-station-bandwidth-setting-after-channel.patch b/package/kernel/mac80211/patches/391-mac80211-Fix-station-bandwidth-setting-after-channel.patch
new file mode 100644
index 0000000000..aa8db32e72
--- /dev/null
+++ b/package/kernel/mac80211/patches/391-mac80211-Fix-station-bandwidth-setting-after-channel.patch
@@ -0,0 +1,96 @@
+From: Ilan Peer <ilan.peer@intel.com>
+Date: Fri, 31 Aug 2018 11:31:10 +0300
+Subject: [PATCH] mac80211: Fix station bandwidth setting after channel
+ switch
+
+When performing a channel switch flow for a managed interface, the
+flow did not update the bandwidth of the AP station and the rate
+scale algorithm. In case of a channel width downgrade, this would
+result with the rate scale algorithm using a bandwidth that does not
+match the interface channel configuration.
+
+Fix this by updating the AP station bandwidth and rate scaling algorithm
+before the actual channel change in case of a bandwidth downgrade, or
+after the actual channel change in case of a bandwidth upgrade.
+
+Signed-off-by: Ilan Peer <ilan.peer@intel.com>
+Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
+Signed-off-by: Johannes Berg <johannes.berg@intel.com>
+---
+
+--- a/net/mac80211/mlme.c
++++ b/net/mac80211/mlme.c
+@@ -975,6 +975,10 @@ static void ieee80211_chswitch_work(stru
+ 	 */
+ 
+ 	if (sdata->reserved_chanctx) {
++		struct ieee80211_supported_band *sband = NULL;
++		struct sta_info *mgd_sta = NULL;
++		enum ieee80211_sta_rx_bandwidth bw = IEEE80211_STA_RX_BW_20;
++
+ 		/*
+ 		 * with multi-vif csa driver may call ieee80211_csa_finish()
+ 		 * many times while waiting for other interfaces to use their
+@@ -983,6 +987,48 @@ static void ieee80211_chswitch_work(stru
+ 		if (sdata->reserved_ready)
+ 			goto out;
+ 
++		if (sdata->vif.bss_conf.chandef.width !=
++		    sdata->csa_chandef.width) {
++			/*
++			 * For managed interface, we need to also update the AP
++			 * station bandwidth and align the rate scale algorithm
++			 * on the bandwidth change. Here we only consider the
++			 * bandwidth of the new channel definition (as channel
++			 * switch flow does not have the full HT/VHT/HE
++			 * information), assuming that if additional changes are
++			 * required they would be done as part of the processing
++			 * of the next beacon from the AP.
++			 */
++			switch (sdata->csa_chandef.width) {
++			case NL80211_CHAN_WIDTH_20_NOHT:
++			case NL80211_CHAN_WIDTH_20:
++			default:
++				bw = IEEE80211_STA_RX_BW_20;
++				break;
++			case NL80211_CHAN_WIDTH_40:
++				bw = IEEE80211_STA_RX_BW_40;
++				break;
++			case NL80211_CHAN_WIDTH_80:
++				bw = IEEE80211_STA_RX_BW_80;
++				break;
++			case NL80211_CHAN_WIDTH_80P80:
++			case NL80211_CHAN_WIDTH_160:
++				bw = IEEE80211_STA_RX_BW_160;
++				break;
++			}
++
++			mgd_sta = sta_info_get(sdata, ifmgd->bssid);
++			sband =
++				local->hw.wiphy->bands[sdata->csa_chandef.chan->band];
++		}
++
++		if (sdata->vif.bss_conf.chandef.width >
++		    sdata->csa_chandef.width) {
++			mgd_sta->sta.bandwidth = bw;
++			rate_control_rate_update(local, sband, mgd_sta,
++						 IEEE80211_RC_BW_CHANGED);
++		}
++
+ 		ret = ieee80211_vif_use_reserved_context(sdata);
+ 		if (ret) {
+ 			sdata_info(sdata,
+@@ -993,6 +1039,13 @@ static void ieee80211_chswitch_work(stru
+ 			goto out;
+ 		}
+ 
++		if (sdata->vif.bss_conf.chandef.width <
++		    sdata->csa_chandef.width) {
++			mgd_sta->sta.bandwidth = bw;
++			rate_control_rate_update(local, sband, mgd_sta,
++						 IEEE80211_RC_BW_CHANGED);
++		}
++
+ 		goto out;
+ 	}
+