From: Bitterblue Smith <rtl8821cerfe2@xxxxxxxxx>
[ Upstream commit 76c16af2cb10282274596e21add2c9f0b95c941b ]
The gen 2 chips RTL8192EU and RTL8188FU periodically send the driver
reports about the TX rate, and the driver passes these reports to
sta_statistics. The reports from RTL8192EU may or may not include the
channel width. The reports from RTL8188FU do not include it.
Only access the c2h->ra_report.bw field if the report (skb) is big
enough.
The other problem fixed here is that the code was actually never
changing the channel width initially reported by
rtl8xxxu_bss_info_changed because the value of RATE_INFO_BW_20 is 0.
Fixes: 0985d3a410ac ("rtl8xxxu: Feed current txrate information for mac80211")
Signed-off-by: Bitterblue Smith <rtl8821cerfe2@xxxxxxxxx>
Reviewed-by: Ping-Ke Shih <pkshih@xxxxxxxxxxx>
Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxx>
Link: https://lore.kernel.org/r/5b41f1ae-72e7-6b7a-2459-b736399a1c40@xxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
index e85c6325199b..955fcf97b9dc 100644
--- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
+++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
@@ -5575,7 +5575,6 @@ static void rtl8xxxu_c2hcmd_callback(struct work_struct *work)
rarpt->txrate.flags = 0;
rate = c2h->ra_report.rate;
sgi = c2h->ra_report.sgi;
- bw = c2h->ra_report.bw;
if (rate < DESC_RATE_MCS0) {
rarpt->txrate.legacy =
@@ -5592,8 +5591,13 @@ static void rtl8xxxu_c2hcmd_callback(struct work_struct *work)
RATE_INFO_FLAGS_SHORT_GI;
}
- if (bw == RATE_INFO_BW_20)
- rarpt->txrate.bw |= RATE_INFO_BW_20;
+ if (skb->len >= offsetofend(typeof(*c2h), ra_report.bw)) {
+ if (c2h->ra_report.bw == RTL8XXXU_CHANNEL_WIDTH_40)
+ bw = RATE_INFO_BW_40;
+ else
+ bw = RATE_INFO_BW_20;
+ rarpt->txrate.bw = bw;
+ }
}
bit_rate = cfg80211_calculate_bitrate(&rarpt->txrate);
rarpt->bit_rate = bit_rate;
--
2.35.1
