compiled & tested on cns3xxx Signed-off-by: Koen Vandeputte <koen.vandepu...@ncentric.com> --- ...211-calculate-min-channel-width-correctly.patch | 53 ++++++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 package/kernel/mac80211/patches/354-mac80211-calculate-min-channel-width-correctly.patch
diff --git a/package/kernel/mac80211/patches/354-mac80211-calculate-min-channel-width-correctly.patch b/package/kernel/mac80211/patches/354-mac80211-calculate-min-channel-width-correctly.patch new file mode 100644 index 0000000..4567b02 --- /dev/null +++ b/package/kernel/mac80211/patches/354-mac80211-calculate-min-channel-width-correctly.patch @@ -0,0 +1,53 @@ +From: Johannes Berg <johannes.b...@intel.com> +Date: Fri, 7 Oct 2016 12:23:49 +0200 +Subject: [PATCH] mac80211: calculate min channel width correctly + +In the current minimum chandef code there's an issue in that the +recalculation can happen after rate control is initialized for a +station that has a wider bandwidth than the current chanctx, and +then rate control can immediately start using those higher rates +which could cause problems. + +Observe that first of all that this problem is because we don't +take non-associated and non-uploaded stations into account. The +restriction to non-associated is quite pointless and is one of +the causes for the problem described above, since the rate init +will happen before the station is set to associated; no frames +could actually be sent until associated, but the rate table can +already contain higher rates and that might cause problems. + +Also, rejecting non-uploaded stations is wrong, since the rate +control can select higher rates for those as well. + +Secondly, it's then necessary to recalculate the minimal config +before initializing rate control, so that when rate control is +initialized, the higher rates are already available. This can be +done easily by adding the necessary function call in rate init. + +Change-Id: Ib9bc02d34797078db55459d196993f39dcd43070 +Signed-off-by: Johannes Berg <johannes.b...@intel.com> +--- + +--- a/net/mac80211/chan.c ++++ b/net/mac80211/chan.c +@@ -231,9 +231,6 @@ ieee80211_get_max_required_bw(struct iee + !(sta->sdata->bss && sta->sdata->bss == sdata->bss)) + continue; + +- if (!sta->uploaded || !test_sta_flag(sta, WLAN_STA_ASSOC)) +- continue; +- + max_bw = max(max_bw, ieee80211_get_sta_bw(&sta->sta)); + } + rcu_read_unlock(); +--- a/net/mac80211/rate.c ++++ b/net/mac80211/rate.c +@@ -40,6 +40,8 @@ void rate_control_rate_init(struct sta_i + + ieee80211_sta_set_rx_nss(sta); + ++ ieee80211_recalc_min_chandef(sta->sdata); ++ + if (!ref) + return; + -- 2.7.4 _______________________________________________ Lede-dev mailing list Lede-dev@lists.infradead.org http://lists.infradead.org/mailman/listinfo/lede-dev
