[PATCH rtw-next 12/14] wifi: rtw89: phy: skip trailing 8-byte zeros of PHY status IE for RTL8922D

[Ping-Ke Shih <pkshih@realtek.com>]

Hardware reports a list of PHY status IE. In monitor mode, IE-09 of
PHY status is enabled, and the report contains trailing 8-byte zeros,
causing failed to parse and drop all IE information.

The 8 zeros are recognize as IE type 0, but length of type 0 must be
not 8 (reference to rtw89_phy_gen_def::physt_ie_len[0]).
Check and skip them.

Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
---
 drivers/net/wireless/realtek/rtw89/core.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/net/wireless/realtek/rtw89/core.c b/drivers/net/wireless/realtek/rtw89/core.c
index 7e1182a49942..fddb0c822c28 100644
--- a/drivers/net/wireless/realtek/rtw89/core.c
+++ b/drivers/net/wireless/realtek/rtw89/core.c
@@ -2275,6 +2275,13 @@ static int rtw89_core_rx_parse_phy_sts(struct rtw89_dev *rtwdev,
 	while (pos < end) {
 		const struct rtw89_phy_sts_iehdr *iehdr = pos;
 
+		/*
+		 * RTL8922D might reports 8 bytes zeros at end if IE09 presents.
+		 * Check and ignore the zeros.
+		 */
+		if (unlikely(phy_ppdu->ie09 && end - pos == 8 && iehdr->w0 == 0))
+			break;
+
 		ie_len = rtw89_core_get_phy_status_ie_len(rtwdev, iehdr);
 		pos += ie_len;
 		if (pos > end || ie_len == 0) {
-- 
2.25.1