PTR_RET is now PTR_ERR_OR_ZERO(): Replace most.

Sweep of the simple cases.

Cc: netdev@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/drivers/net/appletalk/cops.c b/drivers/net/appletalk/cops.c
index cff6f02..7f2a032 100644
--- a/drivers/net/appletalk/cops.c
+++ b/drivers/net/appletalk/cops.c
@@ -996,7 +996,7 @@
 		printk(KERN_WARNING "%s: You shouldn't autoprobe with insmod\n",
 			cardname);
 	cops_dev = cops_probe(-1);
-	return PTR_RET(cops_dev);
+	return PTR_ERR_OR_ZERO(cops_dev);
 }
 
 static void __exit cops_module_exit(void)