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- From 52a192362932f333a7ebafd581c4d9b81da2fec8 Mon Sep 17 00:00:00 2001
- From: Stanislaw Gruszka <sgruszka@redhat.com>
- Date: Mon, 28 May 2018 13:25:06 +0200
- Subject: [PATCH] Revert "rt2800: use TXOP_BACKOFF for probe frames"
- 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>
- Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
- ---
- 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;
- --
- 2.17.1
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