2018-05-28 13:45:43 +00:00
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From patchwork Mon May 28 11:25:06 2018
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Content-Type: text/plain; charset="utf-8"
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MIME-Version: 1.0
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Content-Transfer-Encoding: 7bit
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Subject: Revert "rt2800: use TXOP_BACKOFF for probe frames"
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From: Stanislaw Gruszka <sgruszka@redhat.com>
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X-Patchwork-Id: 10431861
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Message-Id: <1527506706-6488-1-git-send-email-sgruszka@redhat.com>
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To: linux-wireless@vger.kernel.org
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Date: Mon, 28 May 2018 13:25:06 +0200
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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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---
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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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--- a/drivers/net/wireless/ralink/rt2x00/rt2x00queue.c
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+++ b/drivers/net/wireless/ralink/rt2x00/rt2x00queue.c
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2018-06-22 07:43:56 +00:00
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@@ -372,16 +372,15 @@ static void rt2x00queue_create_tx_descri
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2018-05-28 13:45:43 +00:00
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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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