rtlwifi: rtl8192cu: Fix too long disable of IRQs

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 rtl8192cu.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Stable <stable@vger.kernel.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 14 insertions, 1 deletions

diff --git a/drivers/net/wireless/rtlwifi/rtl8192cu/hw.c b/drivers/net/wireless/rtlwifi/rtl8192cu/hw.c
index db7df7f83a02..68b5c7e92cfb 100644
--- a/drivers/net/wireless/rtlwifi/rtl8192cu/hw.c
+++ b/drivers/net/wireless/rtlwifi/rtl8192cu/hw.c
@@ -985,6 +985,17 @@ int rtl92cu_hw_init(struct ieee80211_hw *hw)
         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
         int err = 0;
         static bool iqk_initialized;
+        unsigned long flags;
+
+        /* 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();
 
         rtlhal->hw_type = HARDWARE_TYPE_RTL8192CU;
         err = _rtl92cu_init_mac(hw);
@@ -997,7 +1008,7 @@ int rtl92cu_hw_init(struct ieee80211_hw *hw)
                 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
                          "Failed to download FW. Init HW without FW now..\n");
                 err = 1;
-                return err;
+                goto exit;
         }
         rtlhal->last_hmeboxnum = 0; /* h2c */
         _rtl92cu_phy_param_tab_init(hw);
@@ -1034,6 +1045,8 @@ int rtl92cu_hw_init(struct ieee80211_hw *hw)
         _InitPABias(hw);
         _update_mac_setting(hw);
         rtl92c_dm_init(hw);
+exit:
+        local_irq_restore(flags);
         return err;
 }