drivers/base/node: handle error properly in register_one_node()

If register_node() returns an error, it is not handled correctly.
The function will proceed further and try to register CPUs under the
node, which is not correct.

So, in this patch, if register_node() returns an error, we return
immediately from the function.

Link: https://lkml.kernel.org/r/[e-mail]
Fixes: 76b67ed9dce6 ("[PATCH] node hotplug: register cpu: remove node struct")
Signed-off-by: Donet Tom <[e-mail]>
Acked-by: David Hildenbrand <[e-mail]>
Cc: Alison Schofield <[e-mail]>
Cc: Danilo Krummrich <[e-mail]>
Cc: Dave Jiang <[e-mail]>
Cc: Donet Tom <[e-mail]>
Cc: Greg Kroah-Hartman <[e-mail]>
Cc: Hiroyouki Kamezawa <[e-mail]>
Cc: Joanthan Cameron <[e-mail]>
Cc: Oscar Salvador <[e-mail]>
Cc: "Ritesh Harjani (IBM)" <[e-mail]>
Cc: Yury Norov (NVIDIA) <[e-mail]>
Cc: Zi Yan <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>

drivers/base/node.c

···
 	node_devices[nid] = node;
 
 	error = register_node(node_devices[nid], nid);
+	if (error) {
+		node_devices[nid] = NULL;
+		kfree(node);
+		return error;
+	}
 
 	/* link cpu under this node */
 	for_each_present_cpu(cpu) {