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f18f08d9c8
Import a revert-commit from Stanislaw Gruszka which significantly
improves WiFi performance on rt2x00 based hardware.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
(cherry-picked from commit f4a639a3d7)
46 lines
1.8 KiB
Diff
46 lines
1.8 KiB
Diff
From 52a192362932f333a7ebafd581c4d9b81da2fec8 Mon Sep 17 00:00:00 2001
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From: Stanislaw Gruszka <sgruszka@redhat.com>
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Date: Mon, 28 May 2018 13:25:06 +0200
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Subject: [PATCH] Revert "rt2800: use TXOP_BACKOFF for probe frames"
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This reverts commit fb47ada8dc3c30c8e7b415da155742b49536c61e.
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In some situations when we set TXOP_BACKOFF, the probe frame is
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not sent at all. What it worse then sending probe frame as part
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of AMPDU and can degrade 11n performance to 11g rates.
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Cc: stable@vger.kernel.org
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Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
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Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
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---
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drivers/net/wireless/ralink/rt2x00/rt2x00queue.c | 7 +++----
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1 file changed, 3 insertions(+), 4 deletions(-)
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diff --git a/drivers/net/wireless/ralink/rt2x00/rt2x00queue.c b/drivers/net/wireless/ralink/rt2x00/rt2x00queue.c
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index a6884e73d2ab..7ddee980048b 100644
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--- a/drivers/net/wireless/ralink/rt2x00/rt2x00queue.c
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+++ b/drivers/net/wireless/ralink/rt2x00/rt2x00queue.c
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@@ -372,16 +372,15 @@ static void rt2x00queue_create_tx_descriptor_ht(struct rt2x00_dev *rt2x00dev,
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/*
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* Determine IFS values
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- * - Use TXOP_BACKOFF for probe and management frames except beacons
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+ * - Use TXOP_BACKOFF for management frames except beacons
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* - Use TXOP_SIFS for fragment bursts
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* - Use TXOP_HTTXOP for everything else
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*
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* Note: rt2800 devices won't use CTS protection (if used)
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* for frames not transmitted with TXOP_HTTXOP
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*/
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- if ((ieee80211_is_mgmt(hdr->frame_control) &&
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- !ieee80211_is_beacon(hdr->frame_control)) ||
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- (tx_info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE))
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+ if (ieee80211_is_mgmt(hdr->frame_control) &&
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+ !ieee80211_is_beacon(hdr->frame_control))
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txdesc->u.ht.txop = TXOP_BACKOFF;
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else if (!(tx_info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT))
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txdesc->u.ht.txop = TXOP_SIFS;
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--
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2.17.1
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