rtlwifi: rtl8192se: Fix too long disable of IRQs

commit 2610decdd0b3808ba20471a999835cfee5275f98 upstream.

In commit f78bccd79ba3cd9d9664981b501d57bdb81ab8a4 entitled "rtlwifi:
rtl8192ce: Fix too long disable of IRQs", Olivier Langlois
<olivier@trillion01.com> fixed a problem caused by an extra long disabling
of interrupts. This patch makes the same fix for rtl8192se.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
[bwh: Backported to 3.2:
 - Adjust context
 - Drop change to an error path that we don't have]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

diff --git a/drivers/net/wireless/rtlwifi/rtl8192se/hw.c b/drivers/net/wireless/rtlwifi/rtl8192se/hw.c
index c474486..503c160 100644 (file)
--- a/drivers/net/wireless/rtlwifi/rtl8192se/hw.c
+++ b/drivers/net/wireless/rtlwifi/rtl8192se/hw.c
@@ -924,7 +924,7 @@ int rtl92se_hw_init(struct ieee80211_hw *hw)
        struct rtl_pci *rtlpci = rtl_pcidev(rtl_pcipriv(hw));
        struct rtl_efuse *rtlefuse = rtl_efuse(rtl_priv(hw));
        u8 tmp_byte = 0;
-
+       unsigned long flags;
        bool rtstatus = true;
        u8 tmp_u1b;
        int err = false;
@@ -936,6 +936,16 @@ int rtl92se_hw_init(struct ieee80211_hw *hw)
 
        rtlpci->being_init_adapter = true;
 
+       /* As this function can take a very long time (up to 350 ms)
+        * and can be called with irqs disabled, reenable the irqs
+        * to let the other devices continue being serviced.
+        *
+        * It is safe doing so since our own interrupts will only be enabled
+        * in a subsequent step.
+        */
+       local_save_flags(flags);
+       local_irq_enable();
+
        rtlpriv->intf_ops->disable_aspm(hw);
 
        /* 1. MAC Initialize */
@@ -969,7 +979,8 @@ int rtl92se_hw_init(struct ieee80211_hw *hw)
        /* 3. Initialize MAC/PHY Config by MACPHY_reg.txt */
        if (rtl92s_phy_mac_config(hw) != true) {
                RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG, ("MAC Config failed\n"));
-               return rtstatus;
+               err = rtstatus;
+               goto exit;
        }
 
        /* Make sure BB/RF write OK. We should prevent enter IPS. radio off. */
@@ -979,7 +990,8 @@ int rtl92se_hw_init(struct ieee80211_hw *hw)
        /* 4. Initialize BB After MAC Config PHY_reg.txt, AGC_Tab.txt */
        if (rtl92s_phy_bb_config(hw) != true) {
                RT_TRACE(rtlpriv, COMP_INIT, DBG_EMERG, ("BB Config failed\n"));
-               return rtstatus;
+               err = rtstatus;
+               goto exit;
        }
 
        /* 5. Initiailze RF RAIO_A.txt RF RAIO_B.txt */
@@ -1015,7 +1027,8 @@ int rtl92se_hw_init(struct ieee80211_hw *hw)
 
        if (rtl92s_phy_rf_config(hw) != true) {
                RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG, ("RF Config failed\n"));
-               return rtstatus;
+               err = rtstatus;
+               goto exit;
        }
 
        /* After read predefined TXT, we must set BB/MAC/RF
@@ -1089,8 +1102,9 @@ int rtl92se_hw_init(struct ieee80211_hw *hw)
 
        rtlpriv->cfg->ops->led_control(hw, LED_CTL_POWER_ON);
        rtl92s_dm_init(hw);
+exit:
+       local_irq_restore(flags);
        rtlpci->being_init_adapter = false;
-
        return err;
 }