From: Larry Finger <Larry.Finger@lwfinger.net>
Date: Fri, 4 May 2012 13:27:43 +0000 (-0500)
Subject: rtlwifi: fix for race condition when firmware is cached
X-Git-Tag: v3.3.8~8
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0adf705f805bbb05a776c72f7cdff03d85218513;p=thirdparty%2Fkernel%2Fstable.git

rtlwifi: fix for race condition when firmware is cached

commit 574e02abaf816b582685805f0c1150ca9f1f18ee upstream.

In commit b0302ab, the rtlwifi family of drivers was converted to use
asynchronous firmware loading. Unfortumately, the implementation was
racy, and the ieee80211 routines could be started before rtl_init_core()
was called to setup the data.

This patch fixes the bug noted in https://bugzilla.kernel.org/show_bug.cgi?id=43187.

Reported-by: Joshua Roys <Joshua.Roys@gtri.gatech.edu>
Tested-by: Neptune Ning <frostyplanet@gmail.com>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/net/wireless/rtlwifi/pci.c b/drivers/net/wireless/rtlwifi/pci.c
index b588ca8357141..3c5e8900294ec 100644
--- a/drivers/net/wireless/rtlwifi/pci.c
+++ b/drivers/net/wireless/rtlwifi/pci.c
@@ -1865,14 +1865,6 @@ int __devinit rtl_pci_probe(struct pci_dev *pdev,
 	/*like read eeprom and so on */
 	rtlpriv->cfg->ops->read_eeprom_info(hw);
 
-	if (rtlpriv->cfg->ops->init_sw_vars(hw)) {
-		RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
-			 ("Can't init_sw_vars.\n"));
-		goto fail3;
-	}
-
-	rtlpriv->cfg->ops->init_sw_leds(hw);
-
 	/*aspm */
 	rtl_pci_init_aspm(hw);
 
@@ -1892,6 +1884,15 @@ int __devinit rtl_pci_probe(struct pci_dev *pdev,
 		goto fail3;
 	}
 
+	if (rtlpriv->cfg->ops->init_sw_vars(hw)) {
+		RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
+			 ("Can't init_sw_vars.\n"));
+		err = -ENODEV;
+		goto fail3;
+	}
+
+	rtlpriv->cfg->ops->init_sw_leds(hw);
+
 	err = sysfs_create_group(&pdev->dev.kobj, &rtl_attribute_group);
 	if (err) {
 		RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
diff --git a/drivers/net/wireless/rtlwifi/usb.c b/drivers/net/wireless/rtlwifi/usb.c
index 049e2070ce245..20b53aea7e406 100644
--- a/drivers/net/wireless/rtlwifi/usb.c
+++ b/drivers/net/wireless/rtlwifi/usb.c
@@ -970,12 +970,6 @@ int __devinit rtl_usb_probe(struct usb_interface *intf,
 	rtlpriv->cfg->ops->read_chip_version(hw);
 	/*like read eeprom and so on */
 	rtlpriv->cfg->ops->read_eeprom_info(hw);
-	if (rtlpriv->cfg->ops->init_sw_vars(hw)) {
-		RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
-			 ("Can't init_sw_vars.\n"));
-		goto error_out;
-	}
-	rtlpriv->cfg->ops->init_sw_leds(hw);
 	err = _rtl_usb_init(hw);
 	err = _rtl_usb_init_sw(hw);
 	/* Init mac80211 sw */
@@ -985,6 +979,12 @@ int __devinit rtl_usb_probe(struct usb_interface *intf,
 			 ("Can't allocate sw for mac80211.\n"));
 		goto error_out;
 	}
+	if (rtlpriv->cfg->ops->init_sw_vars(hw)) {
+		RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
+			 ("Can't init_sw_vars.\n"));
+		goto error_out;
+	}
+	rtlpriv->cfg->ops->init_sw_leds(hw);
 
 	return 0;
 error_out: