wifi: mt76: mt7925: fix CLC command timeout when suspend/resume

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 <[email protected]>
Link: https://patch.msgid.link/bab00a2805d0533fd8beaa059222659858a9dcb5.1735910455.git.quan.zhou@mediatek.com
Signed-off-by: Felix Fietkau <[email protected]>

Author: Quanzhoucen

drivers/net/wireless/mediatek/mt76/mt7925/init.c

@@ -57,13 +57,26 @@ static int mt7925_thermal_init(struct mt792x_phy *phy)
 						       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)
 {
 	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) &&
@@ -79,11 +92,12 @@ 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);

drivers/net/wireless/mediatek/mt76/mt7925/mt7925.h

@@ -215,6 +215,7 @@ int mt7925_mcu_chip_config(struct mt792x_dev *dev, const char *cmd);
 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);

drivers/net/wireless/mediatek/mt76/mt7925/pci.c

@@ -557,11 +557,14 @@ static int mt7925_pci_resume(struct device *device)
 	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;