wifi: rtw88: add mutex when set regulatory and get Tx power table

Applying regulatory and getting Tx power table will access hal
data, it should hold rtwdev::mutex to avoid hal data changed during
setting flow.
Signed-off-by: Chih-Kang Chang <gary.chang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220809084107.38137-3-pkshih@realtek.com

drivers/net/wireless/realtek/rtw88/debug.c

@@ -621,11 +621,13 @@ static int rtw_debugfs_get_tx_pwr_tbl(struct seq_file *m, void *v)
 	struct rtw_debugfs_priv *debugfs_priv = m->private;
 	struct rtw_dev *rtwdev = debugfs_priv->rtwdev;
 	struct rtw_hal *hal = &rtwdev->hal;
-	u8 path, rate;
+	u8 path, rate, bw, ch, regd;
 	struct rtw_power_params pwr_param = {0};
-	u8 bw = hal->current_band_width;
-	u8 ch = hal->current_channel;
-	u8 regd = rtw_regd_get(rtwdev);
+
+	mutex_lock(&rtwdev->mutex);
+	bw = hal->current_band_width;
+	ch = hal->current_channel;
+	regd = rtw_regd_get(rtwdev);
 
 	seq_printf(m, "channel: %u\n", ch);
 	seq_printf(m, "bandwidth: %u\n", bw);
@@ -667,6 +669,7 @@ static int rtw_debugfs_get_tx_pwr_tbl(struct seq_file *m, void *v)
 	}
 
 	mutex_unlock(&hal->tx_power_mutex);
+	mutex_unlock(&rtwdev->mutex);
 
 	return 0;
 }

drivers/net/wireless/realtek/rtw88/regd.c

@@ -479,6 +479,7 @@ void rtw_regd_notifier(struct wiphy *wiphy, struct regulatory_request *request)
 	rtw_dbg(rtwdev, RTW_DBG_REGD, "regd state: %d -> %d\n",
 		rtwdev->regd.state, next_regd.state);
 
+	mutex_lock(&rtwdev->mutex);
 	rtwdev->regd = next_regd;
 	rtw_dbg_regd_dump(rtwdev, "get alpha2 %c%c from initiator %d: ",
 			  request->alpha2[0],
@@ -487,6 +488,7 @@ void rtw_regd_notifier(struct wiphy *wiphy, struct regulatory_request *request)
 
 	rtw_phy_adaptivity_set_mode(rtwdev);
 	rtw_phy_set_tx_power_level(rtwdev, hal->current_channel);
+	mutex_unlock(&rtwdev->mutex);
 }
 
 u8 rtw_regd_get(struct rtw_dev *rtwdev)