From: Julian Wiedmann <jwi@linux.ibm.com>
Subject: s390/qeth: remove various redundant code
Patch-mainline: v4.20-rc1
Git-commit: 6585ac4e5d74e8e8310c87c18782812faada13a8
References: FATE#326377, LTC#169210, bsc#1115382

Summary:        qeth: Full-blown TCP Segmentation Offload
Description:    As of now, qeth only supports TCP Segmentation Offload (TSO)
                for IPv4 in Layer3 devices. This feature extends the existing
                support to IPv6, and adds support for TSO in both IP variants
                for Layer2.

                To cleanly pull in all the necessary changes to the transmit
                code, update the qeth driver to the current 4.20 level.


Upstream-Description:

             s390/qeth: remove various redundant code

             1. tracing iob->rc makes no sense when it hasn't been modified by the
                callback,
             2. the qeth_dbf_list is declared with LIST_HEAD, which also initializes
                the list,
             3. the ccwgroup core only calls the thaw/restore callbacks if the gdev
                is online, so we don't have to check for it again.

             Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
             Signed-off-by: David S. Miller <davem@davemloft.net>

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/s390/net/qeth_core_main.c |    7 -------
 drivers/s390/net/qeth_l2_main.c   |    5 +----
 drivers/s390/net/qeth_l3_main.c   |    5 +----
 3 files changed, 2 insertions(+), 15 deletions(-)

--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -2165,7 +2165,6 @@ static int qeth_cm_enable_cb(struct qeth
 	memcpy(&card->token.cm_filter_r,
 	       QETH_CM_ENABLE_RESP_FILTER_TOKEN(iob->data),
 	       QETH_MPC_TOKEN_LENGTH);
-	QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
 	return 0;
 }
 
@@ -2191,7 +2190,6 @@ static int qeth_cm_enable(struct qeth_ca
 static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
 		unsigned long data)
 {
-
 	struct qeth_cmd_buffer *iob;
 
 	QETH_DBF_TEXT(SETUP, 2, "cmsetpcb");
@@ -2200,7 +2198,6 @@ static int qeth_cm_setup_cb(struct qeth_
 	memcpy(&card->token.cm_connection_r,
 	       QETH_CM_SETUP_RESP_DEST_ADDR(iob->data),
 	       QETH_MPC_TOKEN_LENGTH);
-	QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
 	return 0;
 }
 
@@ -2222,7 +2219,6 @@ static int qeth_cm_setup(struct qeth_car
 	rc = qeth_send_control_data(card, CM_SETUP_SIZE, iob,
 				    qeth_cm_setup_cb, NULL);
 	return rc;
-
 }
 
 static int qeth_update_max_mtu(struct qeth_card *card, unsigned int max_mtu)
@@ -2282,7 +2278,6 @@ static int qeth_get_mtu_outof_framesize(
 static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
 		unsigned long data)
 {
-
 	__u16 mtu, framesize;
 	__u16 len;
 	__u8 link_type;
@@ -2310,7 +2305,6 @@ static int qeth_ulp_enable_cb(struct qet
 	} else
 		card->info.link_type = 0;
 	QETH_DBF_TEXT_(SETUP, 2, "link%d", card->info.link_type);
-	QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
 	return 0;
 }
 
@@ -6580,7 +6574,6 @@ static int __init qeth_core_init(void)
 
 	pr_info("loading core functions\n");
 	INIT_LIST_HEAD(&qeth_core_card_list.list);
-	INIT_LIST_HEAD(&qeth_dbf_list);
 	rwlock_init(&qeth_core_card_list.rwlock);
 
 	qeth_wq = create_singlethread_workqueue("qeth_wq");
--- a/drivers/s390/net/qeth_l2_main.c
+++ b/drivers/s390/net/qeth_l2_main.c
@@ -1146,9 +1146,6 @@ static int qeth_l2_pm_resume(struct ccwg
 	struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 	int rc = 0;
 
-	if (gdev->state == CCWGROUP_OFFLINE)
-		goto out;
-
 	if (card->state == CARD_STATE_RECOVER) {
 		rc = __qeth_l2_set_online(card->gdev, 1);
 		if (rc) {
@@ -1158,7 +1155,7 @@ static int qeth_l2_pm_resume(struct ccwg
 		}
 	} else
 		rc = __qeth_l2_set_online(card->gdev, 0);
-out:
+
 	qeth_set_allowed_threads(card, 0xffffffff, 0);
 	netif_device_attach(card->dev);
 	if (rc)
--- a/drivers/s390/net/qeth_l3_main.c
+++ b/drivers/s390/net/qeth_l3_main.c
@@ -2720,9 +2720,6 @@ static int qeth_l3_pm_resume(struct ccwg
 	struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 	int rc = 0;
 
-	if (gdev->state == CCWGROUP_OFFLINE)
-		goto out;
-
 	if (card->state == CARD_STATE_RECOVER) {
 		rc = __qeth_l3_set_online(card->gdev, 1);
 		if (rc) {
@@ -2732,7 +2729,7 @@ static int qeth_l3_pm_resume(struct ccwg
 		}
 	} else
 		rc = __qeth_l3_set_online(card->gdev, 0);
-out:
+
 	qeth_set_allowed_threads(card, 0xffffffff, 0);
 	netif_device_attach(card->dev);
 	if (rc)