mac80211: rt2x00: backport upstream patches

[openwrt/staging/ynezz.git] / package / kernel / mac80211 / patches / rt2x00 / 072-rt2x00-do-not-set-IEEE80211_TX_STAT_AMPDU_NO_BACK-on.patch

diff --git a/package/kernel/mac80211/patches/rt2x00/072-rt2x00-do-not-set-IEEE80211_TX_STAT_AMPDU_NO_BACK-on.patch b/package/kernel/mac80211/patches/rt2x00/072-rt2x00-do-not-set-IEEE80211_TX_STAT_AMPDU_NO_BACK-on.patch
new file mode 100644 (file)
index 0000000..22c952d
--- /dev/null
+++ b/package/kernel/mac80211/patches/rt2x00/072-rt2x00-do-not-set-IEEE80211_TX_STAT_AMPDU_NO_BACK-on.patch
@@ -0,0 +1,40 @@
+From 567a9b766b47caffe4b1bf74823e7bc18532d875 Mon Sep 17 00:00:00 2001
+From: Stanislaw Gruszka <sgruszka@redhat.com>
+Date: Fri, 23 Aug 2019 09:09:56 +0200
+Subject: [PATCH 13/15] rt2x00: do not set IEEE80211_TX_STAT_AMPDU_NO_BACK on
+ tx status
+
+According to documentation IEEE80211_TX_STAT_AMPDU_NO_BACK is suppose
+to be used when we do not recive BA (BlockAck). However on rt2x00 we
+use it when remote station fail to decode one or more subframes within
+AMPDU (some bits are not set in BlockAck bitmap). Setting the flag result
+in sent of BAR (BlockAck Request) frame and this might result of abuse
+of BA session, since remote station can sent BA with incorrect
+sequence numbers after receiving BAR. This problem is visible especially
+when connecting two rt2800 devices.
+
+Previously I observed some performance benefits when using the flag
+when connecting with iwlwifi devices. But currently possibly due
+to reacent changes in rt2x00 removing the flag has no effect on
+those test cases.
+
+So remove the IEEE80211_TX_STAT_AMPDU_NO_BACK.
+
+Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
+Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
+---
+ drivers/net/wireless/ralink/rt2x00/rt2x00dev.c | 3 ---
+ 1 file changed, 3 deletions(-)
+
+--- a/drivers/net/wireless/ralink/rt2x00/rt2x00dev.c
++++ b/drivers/net/wireless/ralink/rt2x00/rt2x00dev.c
+@@ -382,9 +382,6 @@ static void rt2x00lib_fill_tx_status(str
+                                 IEEE80211_TX_CTL_AMPDU;
+               tx_info->status.ampdu_len = 1;
+               tx_info->status.ampdu_ack_len = success ? 1 : 0;
+-
+-              if (!success)
+-                      tx_info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
+       }
+ 
+       if (rate_flags & IEEE80211_TX_RC_USE_RTS_CTS) {