From: Sergei Antonov Date: Sun, 21 Aug 2022 16:08:44 +0000 (+0300) Subject: net: ftmac100: set max_mtu to allow DSA overhead setting X-Git-Tag: block-6.1-2022-13-10~73^2~361 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=6c2c782fa0131a091a52bd0b75083fb24c28b6d3;p=linux-block.git net: ftmac100: set max_mtu to allow DSA overhead setting 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 Reviewed-by: Andrew Lunn Link: https://lore.kernel.org/r/20220821160844.474277-1-saproj@gmail.com Signed-off-by: Jakub Kicinski --- 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);