[PATCH 6.12 535/567] wifi: mt76: mt7925: fix CLC command timeout when suspend/resume

Greg Kroah-Hartman
2026-01-06T17:43:50Z

From: Quan Zhou <quan.zhou@mediatek.com>

[ Upstream commit a0f721b8d986b62b4de316444f2b2e356d17e3b5 ]

When enter suspend/resume while in a connected state, the upper layer
will trigger disconnection before entering suspend, and at the same time,
it will trigger regd_notifier() and update CLC, causing the CLC event to
not be received due to suspend, resulting in a command timeout.

Therefore, the update of CLC is postponed until resume, to ensure data
consistency and avoid the occurrence of command timeout.

Signed-off-by: Quan Zhou <quan.zhou@mediatek.com>
Link: https://patch.msgid.link/bab00a2805d0533fd8beaa059222659858a9dcb5.1735910455.git.quan.zhou@mediatek.com
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/net/wireless/mediatek/mt76/mt7925/init.c | 20 +++++++++++++++++---
drivers/net/wireless/mediatek/mt76/mt7925/mt7925.h | 1 +
drivers/net/wireless/mediatek/mt76/mt7925/pci.c | 3 +++
3 files changed, 21 insertions(+), 3 deletions(-)

--- a/drivers/net/wireless/mediatek/mt76/mt7925/init.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7925/init.c
@@ -59,6 +59,18 @@ static int mt7925_thermal_init(struct mt
mt7925_hwmon_groups);
return PTR_ERR_OR_ZERO(hwmon);
}
+
+void mt7925_regd_update(struct mt792x_dev *dev)
+{
+ struct mt76_dev *mdev = &dev->mt76;
+ struct ieee80211_hw *hw = mdev->hw;
+
+ mt7925_mcu_set_clc(dev, mdev->alpha2, dev->country_ie_env);
+ mt7925_mcu_set_channel_domain(hw->priv);
+ mt7925_set_tx_sar_pwr(hw, NULL);
+}
+EXPORT_SYMBOL_GPL(mt7925_regd_update);
+
static void
mt7925_regd_notifier(struct wiphy *wiphy,
struct regulatory_request *req)
@@ -66,6 +78,7 @@ mt7925_regd_notifier(struct wiphy *wiphy
struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
struct mt792x_dev *dev = mt792x_hw_dev(hw);
struct mt76_dev *mdev = &dev->mt76;
+ struct mt76_connac_pm *pm = &dev->pm;

/* allow world regdom at the first boot only */
if (!memcmp(req->alpha2, "00", 2) &&
@@ -81,11 +94,12 @@ mt7925_regd_notifier(struct wiphy *wiphy
mdev->region = req->dfs_region;
dev->country_ie_env = req->country_ie_env;

+ if (pm->suspended)
+ return;
+
dev->regd_in_progress = true;
mt792x_mutex_acquire(dev);
- mt7925_mcu_set_clc(dev, req->alpha2, req->country_ie_env);
- mt7925_mcu_set_channel_domain(hw->priv);
- mt7925_set_tx_sar_pwr(hw, NULL);
+ mt7925_regd_update(dev);
mt792x_mutex_release(dev);
dev->regd_in_progress = false;
wake_up(&dev->wait);
--- a/drivers/net/wireless/mediatek/mt76/mt7925/mt7925.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7925/mt7925.h
@@ -218,6 +218,7 @@ int mt7925_mcu_chip_config(struct mt792x
int mt7925_mcu_set_rxfilter(struct mt792x_dev *dev, u32 fif,
u8 bit_op, u32 bit_map);

+void mt7925_regd_update(struct mt792x_dev *dev);
int mt7925_mac_init(struct mt792x_dev *dev);
int mt7925_mac_sta_add(struct mt76_dev *mdev, struct ieee80211_vif *vif,
struct ieee80211_sta *sta);
--- a/drivers/net/wireless/mediatek/mt76/mt7925/pci.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7925/pci.c
@@ -554,11 +554,14 @@ static int mt7925_pci_resume(struct devi
local_bh_enable();

err = mt76_connac_mcu_set_hif_suspend(mdev, false);
+ if (err < 0)
+ goto failed;

/* restore previous ds setting */
if (!pm->ds_enable)
mt7925_mcu_set_deep_sleep(dev, false);

+ mt7925_regd_update(dev);
failed:
pm->suspended = false;