rtlwifi: fix for race condition when firmware is cached
authorLarry Finger <Larry.Finger@lwfinger.net>
Fri, 4 May 2012 13:27:43 +0000 (08:27 -0500)
committerJohn W. Linville <linville@tuxdriver.com>
Mon, 14 May 2012 17:51:24 +0000 (13:51 -0400)
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>
Cc: Stable <stable@vger.kernel.org> [3.3]
Signed-off-by: John W. Linville <linville@tuxdriver.com>
drivers/net/wireless/rtlwifi/pci.c
drivers/net/wireless/rtlwifi/usb.c

index cc15fdb..67f9430 100644 (file)
@@ -1851,14 +1851,6 @@ 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");
-               err = -ENODEV;
-               goto fail3;
-       }
-
-       rtlpriv->cfg->ops->init_sw_leds(hw);
-
        /*aspm */
        rtl_pci_init_aspm(hw);
 
@@ -1877,6 +1869,14 @@ 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,
index d04dbda..a6049d7 100644 (file)
@@ -971,11 +971,6 @@ 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);
        if (err)
                goto error_out;
@@ -987,6 +982,11 @@ 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: