staging: wlags49_h2: Handle sysfs_create_group return correctly

The function returns 0 on success and non-zero on error. So
correctly record the status so it is freed appropriately.
Signed-off-by: David Kilroy <kilroyd@googlemail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/wlags49_h2/wl_internal.h

@@ -883,7 +883,7 @@ struct wl_private
 	int                         is_registered;
 	int                         is_handling_int;
 	int                         firmware_present;
-	char                        sysfsCreated;
+	bool                        sysfsCreated;
 	CFG_DRV_INFO_STRCT          driverInfo;
 	CFG_IDENTITY_STRCT          driverIdentity;
 	CFG_FW_IDENTITY_STRCT       StationIdentity;

drivers/staging/wlags49_h2/wl_sysfs.c

@@ -120,17 +120,19 @@ static struct attribute_group wlags_group = {
 
 void register_wlags_sysfs(struct net_device *net)
 {
-    struct device *dev = &(net->dev);
-    struct wl_private *lp = wl_priv(net);
-
-    lp->sysfsCreated = sysfs_create_group(&dev->kobj, &wlags_group);
+	struct device *dev = &(net->dev);
+	struct wl_private *lp = wl_priv(net);
+	int err;
+	err = sysfs_create_group(&dev->kobj, &wlags_group);
+	if (!err)
+		lp->sysfsCreated = true;
 }
 
 void unregister_wlags_sysfs(struct net_device *net)
 {
-    struct device *dev = &(net->dev);
-    struct wl_private *lp = wl_priv(net);
+	struct device *dev = &(net->dev);
+	struct wl_private *lp = wl_priv(net);
 
-    if (lp->sysfsCreated)
-	sysfs_remove_group(&dev->kobj, &wlags_group);
+	if (lp->sysfsCreated)
+		sysfs_remove_group(&dev->kobj, &wlags_group);
 }