From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754478AbaD1BbQ (ORCPT ); Sun, 27 Apr 2014 21:31:16 -0400 Received: from shadbolt.e.decadent.org.uk ([88.96.1.126]:42900 "EHLO shadbolt.e.decadent.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752801AbaD1B3W (ORCPT ); Sun, 27 Apr 2014 21:29:22 -0400 Content-Type: text/plain; charset="UTF-8" Content-Disposition: inline Content-Transfer-Encoding: 8bit MIME-Version: 1.0 From: Ben Hutchings To: linux-kernel@vger.kernel.org, stable@vger.kernel.org CC: akpm@linux-foundation.org, "Larry Finger" , "John W. Linville" Date: Mon, 28 Apr 2014 02:11:22 +0100 Message-ID: X-Mailer: LinuxStableQueue (scripts by bwh) Subject: [PATCH 3.2 38/94] rtlwifi: rtl8192se: Fix too long disable of IRQs In-Reply-To: X-SA-Exim-Connect-IP: 192.168.4.249 X-SA-Exim-Mail-From: ben@decadent.org.uk X-SA-Exim-Scanned: No (on shadbolt.decadent.org.uk); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.2.58-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Larry Finger commit 2610decdd0b3808ba20471a999835cfee5275f98 upstream. In commit f78bccd79ba3cd9d9664981b501d57bdb81ab8a4 entitled "rtlwifi: rtl8192ce: Fix too long disable of IRQs", Olivier Langlois fixed a problem caused by an extra long disabling of interrupts. This patch makes the same fix for rtl8192se. Signed-off-by: Larry Finger Signed-off-by: John W. Linville [bwh: Backported to 3.2: - Adjust context - Drop change to an error path that we don't have] Signed-off-by: Ben Hutchings --- --- 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 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 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 /* 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 /* 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 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 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; }