Atomically create attributes when class device is added. This avoids the
race between registering class_device (which generates hotplug event),
and the creation of attribute groups.
Signed-off-by: Stephen Hemminger <[EMAIL PROTECTED]>
--- sky2-2.6.17.orig/net/core/dev.c 2006-04-21 12:20:58.000000000 -0700
+++ sky2-2.6.17/net/core/dev.c 2006-04-21 12:21:45.000000000 -0700
@@ -3043,11 +3043,11 @@
switch(dev->reg_state) {
case NETREG_REGISTERING:
- dev->reg_state = NETREG_REGISTERED;
err = netdev_register_sysfs(dev);
if (err)
printk(KERN_ERR "%s: failed sysfs registration
(%d)\n",
dev->name, err);
+ dev->reg_state = NETREG_REGISTERED;
break;
case NETREG_UNREGISTERING:
--- sky2-2.6.17.orig/net/core/net-sysfs.c 2006-04-21 12:20:58.000000000
-0700
+++ sky2-2.6.17/net/core/net-sysfs.c 2006-04-21 12:21:45.000000000 -0700
@@ -29,7 +29,7 @@
static inline int dev_isalive(const struct net_device *dev)
{
- return dev->reg_state == NETREG_REGISTERED;
+ return dev->reg_state <= NETREG_REGISTERED;
}
/* use same locking rules as GIF* ioctl's */
@@ -445,58 +445,33 @@
void netdev_unregister_sysfs(struct net_device * net)
{
- struct class_device * class_dev = &(net->class_dev);
-
- if (net->get_stats)
- sysfs_remove_group(&class_dev->kobj, &netstat_group);
-
-#ifdef WIRELESS_EXT
- 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);
-
+ class_device_del(&(net->class_dev));
}
/* Create sysfs entries for network device. */
int netdev_register_sysfs(struct net_device *net)
{
struct class_device *class_dev = &(net->class_dev);
- int ret;
+ struct attribute_group **groups = net->sysfs_groups;
+ class_device_initialize(class_dev);
class_dev->class = &net_class;
class_dev->class_data = net;
+ class_dev->groups = groups;
+ BUILD_BUG_ON(BUS_ID_SIZE < IFNAMSIZ);
strlcpy(class_dev->class_id, net->name, BUS_ID_SIZE);
- if ((ret = class_device_register(class_dev)))
- goto out;
- if (net->get_stats &&
- (ret = sysfs_create_group(&class_dev->kobj, &netstat_group)))
- goto out_unreg;
+ if (net->get_stats)
+ *groups++ = &netstat_group;
#ifdef WIRELESS_EXT
- 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)
- sysfs_remove_group(&class_dev->kobj, &netstat_group);
-#else
- return 0;
+ if (net->get_wireless_stats
+ || (net->wireless_handlers &&
net->wireless_handlers->get_wireless_stats))
+ *groups++ = &wireless_group;
#endif
-out_unreg:
- printk(KERN_WARNING "%s: sysfs attribute registration failed %d\n",
- net->name, ret);
- class_device_unregister(class_dev);
-out:
- return ret;
+ return class_device_add(class_dev);
}
int netdev_sysfs_init(void)
--- sky2-2.6.17.orig/include/linux/netdevice.h 2006-04-21 12:20:58.000000000
-0700
+++ sky2-2.6.17/include/linux/netdevice.h 2006-04-21 12:21:45.000000000
-0700
@@ -506,6 +506,8 @@
/* class/net/name entry */
struct class_device class_dev;
+ /* space for optional statistics and wireless sysfs groups */
+ struct attribute_group *sysfs_groups[3];
};
#define NETDEV_ALIGN 32
-
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