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authorDaniel Golle <daniel@makrotopia.org>2018-05-28 15:45:43 +0200
committerDaniel Golle <daniel@makrotopia.org>2018-05-28 15:49:41 +0200
commitf4a639a3d7d40b4f63c431c2d554c479fbcc6b74 (patch)
tree25886a3e2546e3f23223ca3d77a23f73e42b7670 /package/kernel/mac80211/patches
parent55f37310020c48ff575158791eb8dbcc6802c549 (diff)
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mac80211: rt2x00: no longer use TXOP_BACKOFF for probe frames
Import a revert-commit from Stanislaw Gruszka which significantly improves WiFi performance on rt2x00 based hardware. Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Diffstat (limited to 'package/kernel/mac80211/patches')
-rw-r--r--package/kernel/mac80211/patches/090-Revert-rt2800-use-TXOP_BACKOFF-for-probe-frames.patch47
1 files changed, 47 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/090-Revert-rt2800-use-TXOP_BACKOFF-for-probe-frames.patch b/package/kernel/mac80211/patches/090-Revert-rt2800-use-TXOP_BACKOFF-for-probe-frames.patch
new file mode 100644
index 0000000000..53d1c8a094
--- /dev/null
+++ b/package/kernel/mac80211/patches/090-Revert-rt2800-use-TXOP_BACKOFF-for-probe-frames.patch
@@ -0,0 +1,47 @@
+From patchwork Mon May 28 11:25:06 2018
+Content-Type: text/plain; charset="utf-8"
+MIME-Version: 1.0
+Content-Transfer-Encoding: 7bit
+Subject: Revert "rt2800: use TXOP_BACKOFF for probe frames"
+From: Stanislaw Gruszka <sgruszka@redhat.com>
+X-Patchwork-Id: 10431861
+Message-Id: <1527506706-6488-1-git-send-email-sgruszka@redhat.com>
+To: linux-wireless@vger.kernel.org
+Date: Mon, 28 May 2018 13:25:06 +0200
+
+This reverts commit fb47ada8dc3c30c8e7b415da155742b49536c61e.
+
+In some situations when we set TXOP_BACKOFF, the probe frame is
+not sent at all. What it worse then sending probe frame as part
+of AMPDU and can degrade 11n performance to 11g rates.
+
+Cc: stable@vger.kernel.org
+Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
+---
+ drivers/net/wireless/ralink/rt2x00/rt2x00queue.c | 7 +++----
+ 1 file changed, 3 insertions(+), 4 deletions(-)
+
+diff --git a/drivers/net/wireless/ralink/rt2x00/rt2x00queue.c b/drivers/net/wireless/ralink/rt2x00/rt2x00queue.c
+index a6884e73d2ab..7ddee980048b 100644
+--- a/drivers/net/wireless/ralink/rt2x00/rt2x00queue.c
++++ b/drivers/net/wireless/ralink/rt2x00/rt2x00queue.c
+@@ -372,16 +372,15 @@ static void rt2x00queue_create_tx_descriptor_ht(struct rt2x00_dev *rt2x00dev,
+
+ /*
+ * Determine IFS values
+- * - Use TXOP_BACKOFF for probe and management frames except beacons
++ * - Use TXOP_BACKOFF for management frames except beacons
+ * - Use TXOP_SIFS for fragment bursts
+ * - Use TXOP_HTTXOP for everything else
+ *
+ * Note: rt2800 devices won't use CTS protection (if used)
+ * for frames not transmitted with TXOP_HTTXOP
+ */
+- if ((ieee80211_is_mgmt(hdr->frame_control) &&
+- !ieee80211_is_beacon(hdr->frame_control)) ||
+- (tx_info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE))
++ if (ieee80211_is_mgmt(hdr->frame_control) &&
++ !ieee80211_is_beacon(hdr->frame_control))
+ txdesc->u.ht.txop = TXOP_BACKOFF;
+ else if (!(tx_info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT))
+ txdesc->u.ht.txop = TXOP_SIFS;