netdev - [PATCH net-next 2/9] s390/qeth: remove .do_ioctl() callback from driver discipline

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Date:   Mon, 25 Oct 2021 11:56:51 +0200
From:   Julian Wiedmann <jwi@...ux.ibm.com>
To:     David Miller <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     linux-netdev <netdev@...r.kernel.org>,
        linux-s390 <linux-s390@...r.kernel.org>,
        Heiko Carstens <hca@...ux.ibm.com>,
        Karsten Graul <kgraul@...ux.ibm.com>,
        Julian Wiedmann <jwi@...ux.ibm.com>
Subject: [PATCH net-next 2/9] s390/qeth: remove .do_ioctl() callback from driver discipline

With commit 18787eeebd71 ("qeth: use ndo_siocdevprivate") this callback
is now actually used to handle transport mode-specific _private_ ioctls.

We only have such ioctls for L3 devices. So wire up a L3-specific
.ndo_siocdevprivate() callback that handles those ioctls, and defers to
the core qeth_siocdevprivate() for all other private ioctls.

This takes the discipline one step closer to its original purpose of
providing an internal extension for the qeth_core_ccwgroup_driver.

Signed-off-by: Julian Wiedmann <jwi@...ux.ibm.com>
---
 drivers/s390/net/qeth_core.h      |  2 --
 drivers/s390/net/qeth_core_main.c |  5 +----
 drivers/s390/net/qeth_l2_main.c   |  1 -
 drivers/s390/net/qeth_l3_main.c   | 10 +++++-----
 4 files changed, 6 insertions(+), 12 deletions(-)

diff --git a/drivers/s390/net/qeth_core.h b/drivers/s390/net/qeth_core.h
index a5aa0bdc61d6..0dc62b288480 100644
--- a/drivers/s390/net/qeth_core.h
+++ b/drivers/s390/net/qeth_core.h
@@ -771,8 +771,6 @@ struct qeth_discipline {
 	void (*remove) (struct ccwgroup_device *);
 	int (*set_online)(struct qeth_card *card, bool carrier_ok);
 	void (*set_offline)(struct qeth_card *card);
-	int (*do_ioctl)(struct net_device *dev, struct ifreq *rq,
-			void __user *data, int cmd);
 	int (*control_event_handler)(struct qeth_card *card,
 					struct qeth_ipa_cmd *cmd);
 };
diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index 15999a816054..4149ea253fa0 100644
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -6600,10 +6600,7 @@ int qeth_siocdevprivate(struct net_device *dev, struct ifreq *rq, void __user *d
 		rc = qeth_query_oat_command(card, data);
 		break;
 	default:
-		if (card->discipline->do_ioctl)
-			rc = card->discipline->do_ioctl(dev, rq, data, cmd);
-		else
-			rc = -EOPNOTSUPP;
+		rc = -EOPNOTSUPP;
 	}
 	if (rc)
 		QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c
index 07104fe63df4..adba52da9cab 100644
--- a/drivers/s390/net/qeth_l2_main.c
+++ b/drivers/s390/net/qeth_l2_main.c
@@ -2430,7 +2430,6 @@ const struct qeth_discipline qeth_l2_discipline = {
 	.remove = qeth_l2_remove_device,
 	.set_online = qeth_l2_set_online,
 	.set_offline = qeth_l2_set_offline,
-	.do_ioctl = NULL,
 	.control_event_handler = qeth_l2_control_event,
 };
 EXPORT_SYMBOL_GPL(qeth_l2_discipline);
diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c
index e6e921310211..b68942e86666 100644
--- a/drivers/s390/net/qeth_l3_main.c
+++ b/drivers/s390/net/qeth_l3_main.c
@@ -1511,7 +1511,8 @@ static int qeth_l3_arp_flush_cache(struct qeth_card *card)
 	return rc;
 }
 
-static int qeth_l3_do_ioctl(struct net_device *dev, struct ifreq *rq, void __user *data, int cmd)
+static int qeth_l3_ndo_siocdevprivate(struct net_device *dev, struct ifreq *rq,
+				      void __user *data, int cmd)
 {
 	struct qeth_card *card = dev->ml_priv;
 	struct qeth_arp_cache_entry arp_entry;
@@ -1552,7 +1553,7 @@ static int qeth_l3_do_ioctl(struct net_device *dev, struct ifreq *rq, void __use
 		rc = qeth_l3_arp_flush_cache(card);
 		break;
 	default:
-		rc = -EOPNOTSUPP;
+		rc = qeth_siocdevprivate(dev, rq, data, cmd);
 	}
 	return rc;
 }
@@ -1841,7 +1842,7 @@ static const struct net_device_ops qeth_l3_netdev_ops = {
 	.ndo_validate_addr	= eth_validate_addr,
 	.ndo_set_rx_mode	= qeth_l3_set_rx_mode,
 	.ndo_eth_ioctl		= qeth_do_ioctl,
-	.ndo_siocdevprivate	= qeth_siocdevprivate,
+	.ndo_siocdevprivate	= qeth_l3_ndo_siocdevprivate,
 	.ndo_fix_features	= qeth_fix_features,
 	.ndo_set_features	= qeth_set_features,
 	.ndo_tx_timeout		= qeth_tx_timeout,
@@ -1857,7 +1858,7 @@ static const struct net_device_ops qeth_l3_osa_netdev_ops = {
 	.ndo_validate_addr	= eth_validate_addr,
 	.ndo_set_rx_mode	= qeth_l3_set_rx_mode,
 	.ndo_eth_ioctl		= qeth_do_ioctl,
-	.ndo_siocdevprivate	= qeth_siocdevprivate,
+	.ndo_siocdevprivate	= qeth_l3_ndo_siocdevprivate,
 	.ndo_fix_features	= qeth_fix_features,
 	.ndo_set_features	= qeth_set_features,
 	.ndo_tx_timeout		= qeth_tx_timeout,
@@ -2071,7 +2072,6 @@ const struct qeth_discipline qeth_l3_discipline = {
 	.remove = qeth_l3_remove_device,
 	.set_online = qeth_l3_set_online,
 	.set_offline = qeth_l3_set_offline,
-	.do_ioctl = qeth_l3_do_ioctl,
 	.control_event_handler = qeth_l3_control_event,
 };
 EXPORT_SYMBOL_GPL(qeth_l3_discipline);
-- 
2.25.1