From: Sergei Antonov <saproj@gmail.com>
To: netdev@vger.kernel.org
Cc: andrew@lunn.ch, olteanv@gmail.com, davem@davemloft.net,
edumazet@google.com, kuba@kernel.org,
Sergei Antonov <saproj@gmail.com>
Subject: [PATCH] net: ftmac100: set max_mtu to allow DSA overhead setting
Date: Sun, 21 Aug 2022 19:08:44 +0300 [thread overview]
Message-ID: <20220821160844.474277-1-saproj@gmail.com> (raw)
In case ftmac100 is used with a DSA switch, Linux wants to set MTU
to 1504 to accommodate for DSA overhead. With the default max_mtu
it leads to the error message:
ftmac100 92000000.mac eth0: error -22 setting MTU to 1504 to include DSA overhead
ftmac100 supports packet length 1518 (MAX_PKT_SIZE constant), so it is
safe to report it in max_mtu.
Signed-off-by: Sergei Antonov <saproj@gmail.com>
---
drivers/net/ethernet/faraday/ftmac100.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/net/ethernet/faraday/ftmac100.c b/drivers/net/ethernet/faraday/ftmac100.c
index 8a341e2d5833..2e6524009b19 100644
--- a/drivers/net/ethernet/faraday/ftmac100.c
+++ b/drivers/net/ethernet/faraday/ftmac100.c
@@ -1075,6 +1075,7 @@ static int ftmac100_probe(struct platform_device *pdev)
SET_NETDEV_DEV(netdev, &pdev->dev);
netdev->ethtool_ops = &ftmac100_ethtool_ops;
netdev->netdev_ops = &ftmac100_netdev_ops;
+ netdev->max_mtu = MAX_PKT_SIZE;
platform_set_drvdata(pdev, netdev);
--
2.34.1
next reply other threads:[~2022-08-21 16:08 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-21 16:08 Sergei Antonov [this message]
2022-08-21 16:45 ` [PATCH] net: ftmac100: set max_mtu to allow DSA overhead setting Andrew Lunn
2022-08-23 22:40 ` patchwork-bot+netdevbpf
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