[PATCH rtw-next] wifi: rtw89: 8851b: avoid using CPUIO feature with old firmware

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

From: Chih-Kang Chang <gary.chang@realtek.com>

The old firmware for RTL8851B doesn't support CPUIO feature. Add firmware
feature check to avoid C2H register polling timeout.

Reported-by: Maxim Skokov <skokovmaksimevg@gmail.com>
Closes: https://lore.kernel.org/linux-wireless/20260912193939.5565-1-skokovmaksimevg@gmail.com/
Signed-off-by: Chih-Kang Chang <gary.chang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
---
 drivers/net/wireless/realtek/rtw89/fw.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/wireless/realtek/rtw89/fw.c b/drivers/net/wireless/realtek/rtw89/fw.c
index fa30543a8b42..8866c81edc7d 100644
--- a/drivers/net/wireless/realtek/rtw89/fw.c
+++ b/drivers/net/wireless/realtek/rtw89/fw.c
@@ -892,6 +892,7 @@ static const struct __fw_feat_cfg fw_feat_tbl[] = {
 	__CFG_FW_FEAT(RTL8851B, ge, 0, 29, 37, 1, TX_WAKE),
 	__CFG_FW_FEAT(RTL8851B, ge, 0, 29, 37, 1, SCAN_OFFLOAD),
 	__CFG_FW_FEAT(RTL8851B, ge, 0, 29, 41, 0, CRASH_TRIGGER_TYPE_0),
+	__CFG_FW_FEAT(RTL8851B, lt, 0, 29, 57, 0, NO_WOW_CPU_IO_RX),
 	__CFG_FW_FEAT(RTL8851B, ge, 0, 29, 127, 0, SER_L1_BY_EVENT),
 	__CFG_FW_FEAT(RTL8851B, ge, 0, 29, 130, 0, SIM_SER_L0L1_BY_HALT_H2C),
 	__CFG_FW_FEAT(RTL8852A, le, 0, 13, 29, 0, OLD_HT_RA_FORMAT),

base-commit: 73e3b1c94c7d5b4a113e7cbb42665dc2fe3b9d78
prerequisite-patch-id: a874231735fadfceb48a05d7f3b8e9c698976037
-- 
2.25.1