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wifi: rtl8xxxu: Fix the channel width reporting

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[ 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@gmail.com>
Reviewed-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/5b41f1ae-72e7-6b7a-2459-b736399a1c40@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Bitterblue Smith 2022-12-01 16:15:08 +02:00 committed by Greg Kroah-Hartman
parent 8e2d450c4e
commit 36a2786145
1 changed files with 7 additions and 3 deletions
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10
drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
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@ -5574,7 +5574,6 @@ 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 =
@ -5591,8 +5590,13 @@ 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;