class_create() doesn't return a NULL, it only returns ERR_PTRs.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
                " - (C) 2007 Rodolfo Giometti\n");
 
        c2port_class = class_create(THIS_MODULE, "c2port");
-       if (!c2port_class) {
+       if (IS_ERR(c2port_class)) {
                printk(KERN_ERR "c2port: failed to allocate class\n");
-               return -ENOMEM;
+               return PTR_ERR(c2port_class);
        }
        c2port_class->dev_attrs = c2port_attrs;