[PATCH 6.18 220/752] wifi: rtw89: mcc: reset probe counter when receiving beacon

Sasha Levin
2026-02-28T17:51:14Z

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

[ Upstream commit 1b40c1c7571fcf926095ed92f25bd87900bdc8ed ]

For BE chips, needs to transmit QoS null data periodically to ensure
the connection with AP in GC+STA mode. However, in environments
with interference, the Qos null data might fail to transmit
successfully. Therefore, when receive the beacon from AP will
reset the QoS null data failure counter to avoid unnecessary
disconnection.

Signed-off-by: Chih-Kang Chang <gary.chang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20251223030651.480633-13-pkshih@realtek.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/wireless/realtek/rtw89/chan.c | 5 ++++-
drivers/net/wireless/realtek/rtw89/mac80211.c | 1 +
2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/realtek/rtw89/chan.c b/drivers/net/wireless/realtek/rtw89/chan.c
index 86f1b39a967fe..8fe6a7ef738f7 100644
--- a/drivers/net/wireless/realtek/rtw89/chan.c
+++ b/drivers/net/wireless/realtek/rtw89/chan.c
@@ -2608,17 +2608,20 @@ bool rtw89_mcc_detect_go_bcn(struct rtw89_dev *rtwdev,
static void rtw89_mcc_detect_connection(struct rtw89_dev *rtwdev,
struct rtw89_mcc_role *role)
{
+ struct rtw89_vif_link *rtwvif_link = role->rtwvif_link;
struct ieee80211_vif *vif;
bool start_detect;
int ret;

ret = rtw89_core_send_nullfunc(rtwdev, role->rtwvif_link, true, false,
RTW89_MCC_PROBE_TIMEOUT);
- if (ret)
+ if (ret &&
+ READ_ONCE(rtwvif_link->sync_bcn_tsf) == rtwvif_link->last_sync_bcn_tsf)
role->probe_count++;
else
role->probe_count = 0;

+ rtwvif_link->last_sync_bcn_tsf = READ_ONCE(rtwvif_link->sync_bcn_tsf);
if (role->probe_count < RTW89_MCC_PROBE_MAX_TRIES)
return;

diff --git a/drivers/net/wireless/realtek/rtw89/mac80211.c b/drivers/net/wireless/realtek/rtw89/mac80211.c
index 7b04183a3a5dd..474be7a5e49c7 100644
--- a/drivers/net/wireless/realtek/rtw89/mac80211.c
+++ b/drivers/net/wireless/realtek/rtw89/mac80211.c
@@ -127,6 +127,7 @@ static int __rtw89_ops_add_iface_link(struct rtw89_dev *rtwdev,
rtwvif_link->reg_6ghz_power = RTW89_REG_6GHZ_POWER_DFLT;
rtwvif_link->rand_tsf_done = false;
rtwvif_link->detect_bcn_count = 0;
+ rtwvif_link->last_sync_bcn_tsf = 0;

rcu_read_lock();

--
2.51.0