5.10-stable review patch. If anyone has any objections, please let me know.
------------------
From: Bitterblue Smith <rtl8821cerfe2@xxxxxxxxx>
commit a71ed5898dfae68262f79277915d1dfe34586bc6 upstream.
"iw dev wlp2s0 station dump" shows incorrect rx bitrate:
tx bitrate: 866.7 MBit/s VHT-MCS 9 80MHz short GI VHT-NSS 2
rx bitrate: 86.7 MBit/s VHT-MCS 9 VHT-NSS 1
This is because the RX band width is calculated incorrectly. Fix the
calculation according to the phydm_rxsc_2_bw() function from the
official drivers.
After:
tx bitrate: 866.7 MBit/s VHT-MCS 9 80MHz short GI VHT-NSS 2
rx bitrate: 390.0 MBit/s VHT-MCS 9 80MHz VHT-NSS 1
It also works correctly with the AP configured for 20 MHz and 40 MHz.
Tested with RTL8822CE.
Cc: stable@xxxxxxxxxxxxxxx
Fixes: e3037485c68e ("rtw88: new Realtek 802.11ac driver")
Signed-off-by: Bitterblue Smith <rtl8821cerfe2@xxxxxxxxx>
Signed-off-by: Ping-Ke Shih <pkshih@xxxxxxxxxxx>
Link: https://patch.msgid.link/bca8949b-e2bd-4515-98fd-70d3049a0097@xxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/wireless/realtek/rtw88/rtw8822c.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
--- a/drivers/net/wireless/realtek/rtw88/rtw8822c.c
+++ b/drivers/net/wireless/realtek/rtw88/rtw8822c.c
@@ -1813,12 +1813,14 @@ static void query_phy_status_page1(struc
else
rxsc = GET_PHY_STAT_P1_HT_RXSC(phy_status);
- if (rxsc >= 9 && rxsc <= 12)
+ if (rxsc == 0)
+ bw = rtwdev->hal.current_band_width;
+ else if (rxsc >= 1 && rxsc <= 8)
+ bw = RTW_CHANNEL_WIDTH_20;
+ else if (rxsc >= 9 && rxsc <= 12)
bw = RTW_CHANNEL_WIDTH_40;
- else if (rxsc >= 13)
- bw = RTW_CHANNEL_WIDTH_80;
else
- bw = RTW_CHANNEL_WIDTH_20;
+ bw = RTW_CHANNEL_WIDTH_80;
pkt_stat->rx_power[RF_PATH_A] = GET_PHY_STAT_P1_PWDB_A(phy_status) - 110;
pkt_stat->rx_power[RF_PATH_B] = GET_PHY_STAT_P1_PWDB_B(phy_status) - 110;
