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Tue, 6 Sep 2022 11:32:24 +0000 From: Alexandre Bard To: grygorii.strashko@ti.com Cc: linux-omap@vger.kernel.org, Alexandre Bard Subject: [PATCH] net: ethernet: ti: cpsw: Set max and min MTU sizes Date: Tue, 6 Sep 2022 13:32:12 +0200 Message-Id: <20220906113212.8680-1-alexandre.bard@netmodule.com> X-Mailer: git-send-email 2.37.3 X-ClientProxiedBy: ZR0P278CA0007.CHEP278.PROD.OUTLOOK.COM (2603:10a6:910:16::17) To ZR0P278MB0060.CHEP278.PROD.OUTLOOK.COM (2603:10a6:910:1a::8) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 870431e8-c970-49a8-cd8c-08da8ffb7823 X-MS-TrafficTypeDiagnostic: GVAP278MB0796:EE_ X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: ujv4mwPJpJy6WKsjLUx7ACxLwVdHNhUzKt9YCX/PM9ozNH19pYb3N2beQ2HX4xKIGxQ9Swc0VVuVWU6Ir2PUqffHNTbgHGiRteLxHBtCKhGTabe4wz5c1WanNplFIeunLvXgXJI1usjAfXDr4eyOhbKOEkqguSWb2MB9TMDERuJxnpzVEmQQGejUqEpxY6bMMvq8dflppL4zeTRi50VzHrVIzi75kceb3Gt7Cknc3aOyxH+wb5o2G31eYpY6kUPhKssW7+J9ik7duWAwtw7cd83lgKFoApEoP8aEe3nnCJoisYZuUs9KbFCx0Y1E+slFOhoppWdntwBAQEVZLxynv3rxmXTfqI1xCJRLNQU1V0cn3MBmcgE1VNQPaYRJw2IzSToO8vJMSsvlfhej9YyrU1QL76vwT5YPCIItuYrVAi0fai8EzLNUsLE87C40GKOPSGYeSNyOwO8tQgOuPvWMTzDbafhUVdQqtdxcg9WmxC3MOHQDGwSoVM51PVI6gRg9W/OjtoTF9ZcYrp1X9IodsOz9ds7DwICsEWlUgWXQFGLFDTpzd2vc7D9fhxsGWuDFO+cpat0kg560f+F45/TMHwikkn1pvVWNLFlWGMsnNQv1xnki+lS2Dk/9L4bkiG+VAlqu6Tol7NAntvT5lc8uNuCrwn5O3gWwLc52k7D1HAFfUjO+d3vFWNStmiyYZ0QKblor8t47UaXRKomlSGO37EJ6bqSU/+1UdACs7XbKceIqE+TNc4aK+a05QsKEQ9I88Spoegzx8E/FtnKUh+4rdw== X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:ZR0P278MB0060.CHEP278.PROD.OUTLOOK.COM;PTR:;CAT:NONE;SFS:(13230016)(4636009)(376002)(396003)(136003)(39840400004)(346002)(366004)(2616005)(186003)(1076003)(8936002)(83380400001)(44832011)(2906002)(5660300002)(41300700001)(6666004)(6506007)(107886003)(52116002)(26005)(86362001)(36756003)(6486002)(478600001)(6512007)(38100700002)(38350700002)(4326008)(8676002)(66476007)(66556008)(66946007)(6916009)(316002);DIR:OUT;SFP:1102; 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They default to 68 and 1500 respectively. Since the hardware supports wider limits, it is all benefit to set them. Specially when connecting a DSA switch, the DSA code wants to set the MTU of the cpsw port to 1500 + tag size. This was failing without this change. Signed-off-by: Alexandre Bard --- drivers/net/ethernet/ti/cpsw.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c index ed66c4d4d830..83d8c6a8a527 100644 --- a/drivers/net/ethernet/ti/cpsw.c +++ b/drivers/net/ethernet/ti/cpsw.c @@ -1631,6 +1631,9 @@ static int cpsw_probe(struct platform_device *pdev) eth_hw_addr_set(ndev, priv->mac_addr); + ndev->min_mtu = CPSW_MIN_PACKET_SIZE; + ndev->max_mtu = CPSW_MAX_PACKET_SIZE; + cpsw->slaves[0].ndev = ndev; ndev->features |= NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_CTAG_RX;