[PATCH rtw-next 3/7] wifi: rtw89: coex: Clear BT link weight when BT is disabled

From: Ching-Te Ku <[email protected]>

When a BT device is disabled, _update_bt_link_cnt() is no longer called
for that device, so its link_weight[] retains stale values from the last
active period. _set_bind_info() then computes a non-zero band score for
the disabled device, which can lead to an incorrect tdd_bind.rf_band
selection and ultimately wrong coexistence policy.

Clear link_weight[] for any disabled BT device at the start of the
_set_bind_info() loop so that stale scores are not carried forward.

Signed-off-by: Ching-Te Ku <[email protected]>
Signed-off-by: Ping-Ke Shih <[email protected]>
---
 drivers/net/wireless/realtek/rtw89/coex.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/wireless/realtek/rtw89/coex.c b/drivers/net/wireless/realtek/rtw89/coex.c
index d5b1c68539d9..ac3d0c63f930 100644
--- a/drivers/net/wireless/realtek/rtw89/coex.c
+++ b/drivers/net/wireless/realtek/rtw89/coex.c
@@ -8167,6 +8167,10 @@ static void _set_bind_info(struct rtw89_btc *btc, u8 type)
 	memset(bd, 0, sizeof(*bd));
 	/* compare BT 2GHz/5GHz profile by link-weighting */
 	for (i = 0; i < BTC_BT_BMAX; i++) {
+		if (!cx->bt0.enable.now)
+			cx->bt0.link_weight[i] = 0;
+		if (!cx->bt1.enable.now)
+			cx->bt1.link_weight[i] = 0;
 		link_weight[BTC_BT_1ST][i] = cx->bt0.link_weight[i];
 		link_weight[BTC_BT_2ND][i] = cx->bt1.link_weight[i];
 		link_weight[BTC_BT_EXT][i] = cx->bt_ext.link_weight[i];
-- 
2.25.1