wifi: rtw88: add flag check before enter or leave IPS

Enter or leave IPS controlled by mac80211 before driver support HW scan. After support HW scan, driver need to control IPS before start HW scan and scan complete, but mac80211 also ask driver enter or leave IPS. Therefore, we add flag check in IPS to prevent entering or leaving IPS twice. Signed-off-by: Chih-Kang Chang <[email protected]> Signed-off-by: Ping-Ke Shih <[email protected]> Signed-off-by: Kalle Valo <[email protected]> Link: https://lore.kernel.org/r/[email protected]
josf · Aug 10, 2022 · 6bf3a08 · 6bf3a08
1 parent d08458b
commit 6bf3a08
Showing 1 changed file with 5 additions and 2 deletions.
diff --git a/drivers/net/wireless/realtek/rtw88/ps.c b/drivers/net/wireless/realtek/rtw88/ps.c
@@ -19,14 +19,14 @@ static int rtw_ips_pwr_up(struct rtw_dev *rtwdev)
 		rtw_err(rtwdev, "leave idle state failed\n");
 
 	rtw_set_channel(rtwdev);
-	clear_bit(RTW_FLAG_INACTIVE_PS, rtwdev->flags);
 
 	return ret;
 }
 
 int rtw_enter_ips(struct rtw_dev *rtwdev)
 {
-	set_bit(RTW_FLAG_INACTIVE_PS, rtwdev->flags);
+	if (test_and_set_bit(RTW_FLAG_INACTIVE_PS, rtwdev->flags))
+		return 0;
 
 	rtw_coex_ips_notify(rtwdev, COEX_IPS_ENTER);
 
@@ -50,6 +50,9 @@ int rtw_leave_ips(struct rtw_dev *rtwdev)
 {
 	int ret;
 
+	if (!test_and_clear_bit(RTW_FLAG_INACTIVE_PS, rtwdev->flags))
+		return 0;
+
 	rtw_hci_link_ps(rtwdev, false);
 
 	ret = rtw_ips_pwr_up(rtwdev);