[PATCH] fix /sys/class/net/<if>/wireless without dev->get_wireless_stats

dev->get_wireless_stats is deprecated but removing it also removes wireless
subdirectory in sysfs. This patch puts it back.

akpm: I don't know what's happening here.  This might be appropriate as a
2.6.15.x compatibility backport.  Waiting to hear from Jeff.

Signed-off-by: Andrey Borzenkov <arvidjaar@mail.ru>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jeff Garzik <jgarzik@pobox.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 19 insertions, 9 deletions

diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
index e1da81d261d1..58adaf208dd6 100644
--- a/net/core/net-sysfs.c
+++ b/net/core/net-sysfs.c
@@ -16,6 +16,7 @@
 #include <net/sock.h>
 #include <linux/rtnetlink.h>
 #include <linux/wireless.h>
+#include <net/iw_handler.h>
 
 #define to_class_dev(obj) container_of(obj,struct class_device,kobj)
 #define to_net_dev(class) container_of(class, struct net_device, class_dev)
@@ -294,13 +295,19 @@ static ssize_t wireless_show(struct class_device *cd, char *buf,
                                                char *))
 {
         struct net_device *dev = to_net_dev(cd);
-        const struct iw_statistics *iw;
+        const struct iw_statistics *iw = NULL;
         ssize_t ret = -EINVAL;
         
         read_lock(&dev_base_lock);
-        if (dev_isalive(dev) && dev->get_wireless_stats 
-            && (iw = dev->get_wireless_stats(dev)) != NULL) 
-                ret = (*format)(iw, buf);
+        if (dev_isalive(dev)) {
+                if(dev->wireless_handlers &&
+                   dev->wireless_handlers->get_wireless_stats)
+                        iw = dev->wireless_handlers->get_wireless_stats(dev);
+                else if (dev->get_wireless_stats)
+                        iw = dev->get_wireless_stats(dev);
+                if (iw != NULL)
+                        ret = (*format)(iw, buf);
+        }
         read_unlock(&dev_base_lock);
 
         return ret;
@@ -402,7 +409,8 @@ void netdev_unregister_sysfs(struct net_device * net)
                 sysfs_remove_group(&class_dev->kobj, &netstat_group);
 
 #ifdef WIRELESS_EXT
-        if (net->get_wireless_stats)
+        if (net->get_wireless_stats || (net->wireless_handlers &&
+                        net->wireless_handlers->get_wireless_stats))
                 sysfs_remove_group(&class_dev->kobj, &wireless_group);
 #endif
         class_device_del(class_dev);
@@ -427,10 +435,12 @@ int netdev_register_sysfs(struct net_device *net)
                 goto out_unreg; 
 
 #ifdef WIRELESS_EXT
-        if (net->get_wireless_stats &&
-            (ret = sysfs_create_group(&class_dev->kobj, &wireless_group)))
-                goto out_cleanup; 
-
+        if (net->get_wireless_stats || (net->wireless_handlers &&
+                        net->wireless_handlers->get_wireless_stats)) {
+                ret = sysfs_create_group(&class_dev->kobj, &wireless_group);
+                if (ret)
+                        goto out_cleanup;
+        }
         return 0;
 out_cleanup:
         if (net->get_stats)