Revert "rtlwifi: Fix enter/exit power_save"

This reverts commit 98068574, which is
commit ba9f93f8 upstream as it causes
problems.
Reported-by: Dmitry Osipenko <digetx@gmail.com>
Cc: Ping-Ke Shih <pkshih@realtek.com>
Cc: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

drivers/net/wireless/realtek/rtlwifi/base.c

@@ -1303,13 +1303,12 @@ EXPORT_SYMBOL_GPL(rtl_action_proc);
 
 static void setup_arp_tx(struct rtl_priv *rtlpriv, struct rtl_ps_ctl *ppsc)
 {
-	struct ieee80211_hw *hw = rtlpriv->hw;
-
 	rtlpriv->ra.is_special_data = true;
 	if (rtlpriv->cfg->ops->get_btc_status())
 		rtlpriv->btcoexist.btc_ops->btc_special_packet_notify(
 					rtlpriv, 1);
-	rtl_lps_leave(hw);
+	rtlpriv->enter_ps = false;
+	schedule_work(&rtlpriv->works.lps_change_work);
 	ppsc->last_delaylps_stamp_jiffies = jiffies;
 }
 
@@ -1382,7 +1381,8 @@ u8 rtl_is_special_data(struct ieee80211_hw *hw, struct sk_buff *skb, u8 is_tx,
 
 		if (is_tx) {
 			rtlpriv->ra.is_special_data = true;
-			rtl_lps_leave(hw);
+			rtlpriv->enter_ps = false;
+			schedule_work(&rtlpriv->works.lps_change_work);
 			ppsc->last_delaylps_stamp_jiffies = jiffies;
 		}
 

drivers/net/wireless/realtek/rtlwifi/core.c

@@ -1150,8 +1150,10 @@ static void rtl_op_bss_info_changed(struct ieee80211_hw *hw,
 		} else {
 			mstatus = RT_MEDIA_DISCONNECT;
 
-			if (mac->link_state == MAC80211_LINKED)
-				rtl_lps_leave(hw);
+			if (mac->link_state == MAC80211_LINKED) {
+				rtlpriv->enter_ps = false;
+				schedule_work(&rtlpriv->works.lps_change_work);
+			}
 			if (ppsc->p2p_ps_info.p2p_ps_mode > P2P_PS_NONE)
 				rtl_p2p_ps_cmd(hw, P2P_PS_DISABLE);
 			mac->link_state = MAC80211_NOLINK;
@@ -1429,7 +1431,8 @@ static void rtl_op_sw_scan_start(struct ieee80211_hw *hw,
 	}
 
 	if (mac->link_state == MAC80211_LINKED) {
-		rtl_lps_leave(hw);
+		rtlpriv->enter_ps = false;
+		schedule_work(&rtlpriv->works.lps_change_work);
 		mac->link_state = MAC80211_LINKED_SCANNING;
 	} else {
 		rtl_ips_nic_on(hw);

drivers/net/wireless/realtek/rtlwifi/pci.c

@@ -663,9 +663,11 @@ static void _rtl_pci_tx_isr(struct ieee80211_hw *hw, int prio)
 	}
 
 	if (((rtlpriv->link_info.num_rx_inperiod +
-	      rtlpriv->link_info.num_tx_inperiod) > 8) ||
-	      (rtlpriv->link_info.num_rx_inperiod > 2))
-		rtl_lps_leave(hw);
+		rtlpriv->link_info.num_tx_inperiod) > 8) ||
+		(rtlpriv->link_info.num_rx_inperiod > 2)) {
+		rtlpriv->enter_ps = false;
+		schedule_work(&rtlpriv->works.lps_change_work);
+	}
 }
 
 static int _rtl_pci_init_one_rxdesc(struct ieee80211_hw *hw,
@@ -916,8 +918,10 @@ static void _rtl_pci_rx_interrupt(struct ieee80211_hw *hw)
 		}
 		if (((rtlpriv->link_info.num_rx_inperiod +
 		      rtlpriv->link_info.num_tx_inperiod) > 8) ||
-		      (rtlpriv->link_info.num_rx_inperiod > 2))
-			rtl_lps_leave(hw);
+		      (rtlpriv->link_info.num_rx_inperiod > 2)) {
+			rtlpriv->enter_ps = false;
+			schedule_work(&rtlpriv->works.lps_change_work);
+		}
 		skb = new_skb;
 no_new:
 		if (rtlpriv->use_new_trx_flow) {

drivers/net/wireless/realtek/rtlwifi/ps.c

@@ -407,8 +407,8 @@ void rtl_lps_set_psmode(struct ieee80211_hw *hw, u8 rt_psmode)
 	}
 }
 
-/* Interrupt safe routine to enter the leisure power save mode.*/
-static void rtl_lps_enter_core(struct ieee80211_hw *hw)
+/*Enter the leisure power save mode.*/
+void rtl_lps_enter(struct ieee80211_hw *hw)
 {
 	struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 	struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
@@ -444,9 +444,10 @@ static void rtl_lps_enter_core(struct ieee80211_hw *hw)
 
 	spin_unlock_irqrestore(&rtlpriv->locks.lps_lock, flag);
 }
+EXPORT_SYMBOL(rtl_lps_enter);
 
-/* Interrupt safe routine to leave the leisure power save mode.*/
-static void rtl_lps_leave_core(struct ieee80211_hw *hw)
+/*Leave the leisure power save mode.*/
+void rtl_lps_leave(struct ieee80211_hw *hw)
 {
 	struct rtl_priv *rtlpriv = rtl_priv(hw);
 	struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
@@ -476,6 +477,7 @@ static void rtl_lps_leave_core(struct ieee80211_hw *hw)
 	}
 	spin_unlock_irqrestore(&rtlpriv->locks.lps_lock, flag);
 }
+EXPORT_SYMBOL(rtl_lps_leave);
 
 /* For sw LPS*/
 void rtl_swlps_beacon(struct ieee80211_hw *hw, void *data, unsigned int len)
@@ -668,34 +670,12 @@ void rtl_lps_change_work_callback(struct work_struct *work)
 	struct rtl_priv *rtlpriv = rtl_priv(hw);
 
 	if (rtlpriv->enter_ps)
-		rtl_lps_enter_core(hw);
+		rtl_lps_enter(hw);
 	else
-		rtl_lps_leave_core(hw);
+		rtl_lps_leave(hw);
 }
 EXPORT_SYMBOL_GPL(rtl_lps_change_work_callback);
 
-void rtl_lps_enter(struct ieee80211_hw *hw)
-{
-	struct rtl_priv *rtlpriv = rtl_priv(hw);
-
-	if (!in_interrupt())
-		return rtl_lps_enter_core(hw);
-	rtlpriv->enter_ps = true;
-	schedule_work(&rtlpriv->works.lps_change_work);
-}
-EXPORT_SYMBOL_GPL(rtl_lps_enter);
-
-void rtl_lps_leave(struct ieee80211_hw *hw)
-{
-	struct rtl_priv *rtlpriv = rtl_priv(hw);
-
-	if (!in_interrupt())
-		return rtl_lps_leave_core(hw);
-	rtlpriv->enter_ps = false;
-	schedule_work(&rtlpriv->works.lps_change_work);
-}
-EXPORT_SYMBOL_GPL(rtl_lps_leave);
-
 void rtl_swlps_wq_callback(void *data)
 {
 	struct rtl_works *rtlworks = container_of_dwork_rtl(data,