mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-27 01:11:14 +00:00
48 lines
1.9 KiB
Diff
48 lines
1.9 KiB
Diff
|
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;
|