qeth: Cocci spatch "ptr_ret.spatch"

diff -u -p a/drivers/s390/net/claw.c b/drivers/s390/net/claw.c
@@ -3348,7 +3348,7 @@ static int __init claw_init(void)
 	}
 	CLAW_DBF_TEXT(2, setup, "init_mod");
 	claw_root_dev = root_device_register("claw");
-	ret = IS_ERR(claw_root_dev) ? PTR_ERR(claw_root_dev) : 0;
+	ret = PTR_RET(claw_root_dev);
 	if (ret)
 		goto register_err;
 	ret = ccw_driver_register(&claw_ccw_driver);

diff -u -p a/drivers/s390/net/ctcm_main.c b/drivers/s390/net/ctcm_main.c
@@ -1837,7 +1837,7 @@ static int __init ctcm_init(void)
 	if (ret)
 		goto out_err;
 	ctcm_root_dev = root_device_register("ctcm");
-	ret = IS_ERR(ctcm_root_dev) ? PTR_ERR(ctcm_root_dev) : 0;
+	ret = PTR_RET(ctcm_root_dev);
 	if (ret)
 		goto register_err;
 	ret = ccw_driver_register(&ctcm_ccw_driver);

diff -u -p a/drivers/s390/net/lcs.c b/drivers/s390/net/lcs.c
@@ -2441,7 +2441,7 @@ __init lcs_init_module(void)
 	if (rc)
 		goto out_err;
 	lcs_root_dev = root_device_register("lcs");
-	rc = IS_ERR(lcs_root_dev) ? PTR_ERR(lcs_root_dev) : 0;
+	rc = PTR_RET(lcs_root_dev);
 	if (rc)
 		goto register_err;
 	rc = ccw_driver_register(&lcs_ccw_driver);

diff -u -p a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
@@ -5705,7 +5705,7 @@ static int __init qeth_core_init(void)
 	if (rc)
 		goto out_err;
 	qeth_core_root_dev = root_device_register("qeth");
-	rc = IS_ERR(qeth_core_root_dev) ? PTR_ERR(qeth_core_root_dev) : 0;
+	rc = PTR_RET(qeth_core_root_dev);
 	if (rc)
 		goto register_err;
 	qeth_core_header_cache = kmem_cache_create("qeth_hdr",