Fix to have sysfs track rename of network devices

[Mark Huth <mhuth@mvista.com>]

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Description:

When an Ethernet interface is renamed in the kernel via the ioctl SIOCSIFNAME, the sysfs directories /sys/class/net/ethX are not changed to the new name.  This patch ensures sysfs is updated to the new name  specified by the rename ioctl.

Thanks,
Mark Huth



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diff -uNr linux-2.6.0-test3/net/core/dev.c linux-2.6.0-test3-fixifrename/net/core/dev.c
--- linux-2.6.0-test3/net/core/dev.c	2003-08-08 21:36:50.000000000 -0700
+++ linux-2.6.0-test3-fixifrename/net/core/dev.c	2003-08-13 16:11:03.000000000 -0700
@@ -2345,9 +2345,11 @@
 				return -EBUSY;
 			if (__dev_get_by_name(ifr->ifr_newname))
 				return -EEXIST;
+			netdev_unregister_sysfs(dev);
 			memcpy(dev->name, ifr->ifr_newname, IFNAMSIZ);
 			dev->name[IFNAMSIZ - 1] = 0;
 			strlcpy(dev->class_dev.class_id, dev->name, BUS_ID_SIZE);
+			netdev_register_sysfs(dev);
 			notifier_call_chain(&netdev_chain,
 					    NETDEV_CHANGENAME, dev);
 			return 0;