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From:   Ping-Ke Shih <pkshih@realtek.com>
To:     <kvalo@kernel.org>
CC:     <ku920601@realtek.com>, <echuang@realtek.com>,
        <linux-wireless@vger.kernel.org>
Subject: [PATCH 2/6] wifi: rtw89: parse PHY status only when PPDU is to_self
Date:   Wed, 5 Oct 2022 16:32:08 +0800
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From: Eric Huang <echuang@realtek.com>

Without this fix, some non-self packets are used to count CFO (center
frequency offset), and average CFO has unstable variation. Then, it causes
unexpected performance.

Signed-off-by: Eric Huang <echuang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
---
 drivers/net/wireless/realtek/rtw89/core.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/wireless/realtek/rtw89/core.c b/drivers/net/wireless/realtek/rtw89/core.c
index bc2994865372b..a0fa9639b5097 100644
--- a/drivers/net/wireless/realtek/rtw89/core.c
+++ b/drivers/net/wireless/realtek/rtw89/core.c
@@ -1255,6 +1255,9 @@ static int rtw89_core_rx_parse_phy_sts(struct rtw89_dev *rtwdev,
 	if (phy_ppdu->ie < RTW89_CCK_PKT)
 		return -EINVAL;
 
+	if (!phy_ppdu->to_self)
+		return 0;
+
 	pos = (u8 *)phy_ppdu->buf + PHY_STS_HDR_LEN;
 	end = (u8 *)phy_ppdu->buf + phy_ppdu->len;
 	while (pos < end) {
-- 
2.25.1