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From: thomas.perrot@bootlin.com
To: Nicolas Ferre <nicolas.ferre@microchip.com>,
	Claudiu Beznea <claudiu.beznea@tuxon.dev>,
	"David S . Miller" <davem@davemloft.net>,
	Eric Dumazet <edumazet@google.com>,
	Jakub Kicinski <kuba@kernel.org>,
	Paolo Abeni <pabeni@redhat.com>
Cc: netdev@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	Thomas Perrot <thomas.perrot@bootlin.com>
Subject: [PATCH net v3] net: macb: remove change_mtu callback
Date: Mon, 11 Mar 2024 16:43:15 +0100
Message-ID: <20240311154315.2575297-1-thomas.perrot@bootlin.com>
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From: Thomas Perrot <thomas.perrot@bootlin.com>

Because it doesn't allow MTU changes when the interface is up, although
it is not necessary.

This callback has been added to add in a first implementation of the Jumbo
support [1],since it has been reworked and moved to the probe [2].

With this patch the core will set the MTU, regardless of if the interface
is up or not.

[1] commit a5898ea09aad ("net: macb: Add change_mtu callback with
    jumbo support")
[2] commit 44770e1180de ("ethernet: use core min/max MTU checking")

Fixes: 44770e1180de ("ethernet: use core min/max MTU checking")
Signed-off-by: Thomas Perrot <thomas.perrot@bootlin.com>
---

Changes since v3:
 - Update prefix
 - Rebase on net
 - Add tag Fixes

Changes since v2:
 - Update the commit message.

 drivers/net/ethernet/cadence/macb_main.c | 11 -----------
 1 file changed, 11 deletions(-)

diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c
index 898debfd4db3..0532215e5236 100644
--- a/drivers/net/ethernet/cadence/macb_main.c
+++ b/drivers/net/ethernet/cadence/macb_main.c
@@ -3017,16 +3017,6 @@ static int macb_close(struct net_device *dev)
 	return 0;
 }

-static int macb_change_mtu(struct net_device *dev, int new_mtu)
-{
-	if (netif_running(dev))
-		return -EBUSY;
-
-	dev->mtu = new_mtu;
-
-	return 0;
-}
-
 static int macb_set_mac_addr(struct net_device *dev, void *addr)
 {
 	int err;
@@ -3897,7 +3887,6 @@ static const struct net_device_ops macb_netdev_ops = {
 	.ndo_get_stats		= macb_get_stats,
 	.ndo_eth_ioctl		= macb_ioctl,
 	.ndo_validate_addr	= eth_validate_addr,
-	.ndo_change_mtu		= macb_change_mtu,
 	.ndo_set_mac_address	= macb_set_mac_addr,
 #ifdef CONFIG_NET_POLL_CONTROLLER
 	.ndo_poll_controller	= macb_poll_controller,
--
2.44.0