mac80211: fix station rate table updates on assoc

If the driver uses .sta_add, station entries are only uploaded after the sta
is in assoc state. Fix early station rate table updates by deferring them
until the sta has been uploaded

Signed-off-by: Felix Fietkau <nbd@nbd.name>

diff --git a/package/kernel/mac80211/patches/subsys/353-mac80211-fix-station-rate-table-updates-on-assoc.patch b/package/kernel/mac80211/patches/subsys/353-mac80211-fix-station-rate-table-updates-on-assoc.patch
new file mode 100644 (file)
index 0000000..c96fc56
--- /dev/null
+++ b/package/kernel/mac80211/patches/subsys/353-mac80211-fix-station-rate-table-updates-on-assoc.patch
@@ -0,0 +1,38 @@
+From: Felix Fietkau <nbd@nbd.name>
+Date: Mon, 1 Feb 2021 00:59:14 +0100
+Subject: [PATCH] mac80211: fix station rate table updates on assoc
+
+If the driver uses .sta_add, station entries are only uploaded after the sta
+is in assoc state. Fix early station rate table updates by deferring them
+until the sta has been uploaded
+
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+---
+
+--- a/net/mac80211/driver-ops.c
++++ b/net/mac80211/driver-ops.c
+@@ -125,8 +125,11 @@ int drv_sta_state(struct ieee80211_local
+       } else if (old_state == IEEE80211_STA_AUTH &&
+                  new_state == IEEE80211_STA_ASSOC) {
+               ret = drv_sta_add(local, sdata, &sta->sta);
+-              if (ret == 0)
++              if (ret == 0) {
+                       sta->uploaded = true;
++                      if (rcu_dereference(sta->sta.rates))
++                              drv_sta_rate_tbl_update(local, sdata, &sta->sta);
++              }
+       } else if (old_state == IEEE80211_STA_ASSOC &&
+                  new_state == IEEE80211_STA_AUTH) {
+               drv_sta_remove(local, sdata, &sta->sta);
+--- a/net/mac80211/rate.c
++++ b/net/mac80211/rate.c
+@@ -934,7 +934,8 @@ int rate_control_set_rates(struct ieee80
+       if (old)
+               kfree_rcu(old, rcu_head);
+ 
+-      drv_sta_rate_tbl_update(hw_to_local(hw), sta->sdata, pubsta);
++      if (sta->uploaded)
++              drv_sta_rate_tbl_update(hw_to_local(hw), sta->sdata, pubsta);
+ 
+       ieee80211_sta_set_expected_throughput(pubsta, sta_get_expected_throughput(sta));
+