ipw2200: fix oops on missing firmware

For non-monitor interfaces, the syntax for alloc_ieee80211/free_80211
is wrong. Because alloc_ieee80211 only creates (wiphy_new) a wiphy, but
free_80211() does wiphy_unregister() also. This is only correct when
the later wiphy_register() is called successfully, which apparently
is not the case for your fw doesn't exist one.

Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

4 files changed, 16 insertions, 6 deletions

diff --git a/drivers/net/wireless/ipw2x00/ipw2100.c b/drivers/net/wireless/ipw2x00/ipw2100.c
index 240cff1e697..a741d37fd96 100644
--- a/drivers/net/wireless/ipw2x00/ipw2100.c
+++ b/drivers/net/wireless/ipw2x00/ipw2100.c
@@ -6325,8 +6325,10 @@ static int ipw2100_pci_init_one(struct pci_dev *pci_dev,
 
       fail:
         if (dev) {
-                if (registered)
+                if (registered) {
+                        unregister_ieee80211(priv->ieee);
                         unregister_netdev(dev);
+                }
 
                 ipw2100_hw_stop_adapter(priv);
 
@@ -6383,6 +6385,7 @@ static void __devexit ipw2100_pci_remove_one(struct pci_dev *pci_dev)
                 /* Unregister the device first - this results in close()
                  * being called if the device is open.  If we free storage
                  * first, then close() will crash. */
+                unregister_ieee80211(priv->ieee);
                 unregister_netdev(dev);
 
                 /* ipw2100_down will ensure that there is no more pending work
diff --git a/drivers/net/wireless/ipw2x00/ipw2200.c b/drivers/net/wireless/ipw2x00/ipw2200.c
index 8d58e6ed4e7..04341a2a619 100644
--- a/drivers/net/wireless/ipw2x00/ipw2200.c
+++ b/drivers/net/wireless/ipw2x00/ipw2200.c
@@ -11821,6 +11821,7 @@ static int __devinit ipw_pci_probe(struct pci_dev *pdev,
                 if (err) {
                         IPW_ERROR("Failed to register promiscuous network "
                                   "device (error %d).\n", err);
+                        unregister_ieee80211(priv->ieee);
                         unregister_netdev(priv->net_dev);
                         goto out_remove_sysfs;
                 }
@@ -11871,6 +11872,7 @@ static void __devexit ipw_pci_remove(struct pci_dev *pdev)
 
         mutex_unlock(&priv->mutex);
 
+        unregister_ieee80211(priv->ieee);
         unregister_netdev(priv->net_dev);
 
         if (priv->rxq) {
diff --git a/drivers/net/wireless/ipw2x00/libipw.h b/drivers/net/wireless/ipw2x00/libipw.h
index bf45391172f..f42ade6c2d3 100644
--- a/drivers/net/wireless/ipw2x00/libipw.h
+++ b/drivers/net/wireless/ipw2x00/libipw.h
@@ -1020,6 +1020,7 @@ static inline int libipw_is_cck_rate(u8 rate)
 /* ieee80211.c */
 extern void free_ieee80211(struct net_device *dev, int monitor);
 extern struct net_device *alloc_ieee80211(int sizeof_priv, int monitor);
+extern void unregister_ieee80211(struct libipw_device *ieee);
 extern int libipw_change_mtu(struct net_device *dev, int new_mtu);
 
 extern void libipw_networks_age(struct libipw_device *ieee,
diff --git a/drivers/net/wireless/ipw2x00/libipw_module.c b/drivers/net/wireless/ipw2x00/libipw_module.c
index a0e9f6aed7d..be5b809ec97 100644
--- a/drivers/net/wireless/ipw2x00/libipw_module.c
+++ b/drivers/net/wireless/ipw2x00/libipw_module.c
@@ -235,16 +235,19 @@ void free_ieee80211(struct net_device *dev, int monitor)
         libipw_networks_free(ieee);
 
         /* free cfg80211 resources */
-        if (!monitor) {
-                wiphy_unregister(ieee->wdev.wiphy);
-                kfree(ieee->a_band.channels);
-                kfree(ieee->bg_band.channels);
+        if (!monitor)
                 wiphy_free(ieee->wdev.wiphy);
-        }
 
         free_netdev(dev);
 }
 
+void unregister_ieee80211(struct libipw_device *ieee)
+{
+        wiphy_unregister(ieee->wdev.wiphy);
+        kfree(ieee->a_band.channels);
+        kfree(ieee->bg_band.channels);
+}
+
 #ifdef CONFIG_LIBIPW_DEBUG
 
 static int debug = 0;
@@ -330,3 +333,4 @@ module_init(libipw_init);
 
 EXPORT_SYMBOL(alloc_ieee80211);
 EXPORT_SYMBOL(free_ieee80211);
+EXPORT_SYMBOL(unregister_ieee80211);