5.4-stable review patch. If anyone has any objections, please let me know.
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From: Bitterblue Smith rtl8821cerfe2@gmail.com
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@vger.kernel.org Fixes: e3037485c68e ("rtw88: new Realtek 802.11ac driver") Signed-off-by: Bitterblue Smith rtl8821cerfe2@gmail.com Signed-off-by: Ping-Ke Shih pkshih@realtek.com Link: https://patch.msgid.link/bca8949b-e2bd-4515-98fd-70d3049a0097@gmail.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- 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 @@ -1655,12 +1655,14 @@ 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;