From mboxrd@z Thu Jan 1 00:00:00 1970 From: Linus Walleij Subject: [PATCH net-next 5/5 v3] net: gemini: Indicate that we can handle jumboframes Date: Wed, 11 Jul 2018 21:32:45 +0200 Message-ID: <20180711193245.21980-5-linus.walleij@linaro.org> References: <20180711193245.21980-1-linus.walleij@linaro.org> Cc: Hans Ulli Kroll , Florian Fainelli , =?UTF-8?q?Micha=C5=82=20Miros=C5=82aw?= , Andrew Lunn , Linus Walleij To: netdev@vger.kernel.org, "David S . Miller" Return-path: Received: from mail-lj1-f194.google.com ([209.85.208.194]:35957 "EHLO mail-lj1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726783AbeGKTmJ (ORCPT ); Wed, 11 Jul 2018 15:42:09 -0400 Received: by mail-lj1-f194.google.com with SMTP id u7-v6so17614549lji.3 for ; Wed, 11 Jul 2018 12:36:20 -0700 (PDT) In-Reply-To: <20180711193245.21980-1-linus.walleij@linaro.org> Sender: netdev-owner@vger.kernel.org List-ID: The hardware supposedly handles frames up to 10236 bytes and implements .ndo_change_mtu() so accept 10236 minus the ethernet header for a VLAN tagged frame on the netdevices. Use ETH_MIN_MTU as minimum MTU. Signed-off-by: Linus Walleij --- ChangeLog v2->v3: - No changes, just resending with the rest. ChangeLog v1->v2: - Change the min MTU from 256 (vendor code) to ETH_MIN_MTU which makes more sense. --- drivers/net/ethernet/cortina/gemini.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/net/ethernet/cortina/gemini.c b/drivers/net/ethernet/cortina/gemini.c index 0f1d26441177..22f495b490d4 100644 --- a/drivers/net/ethernet/cortina/gemini.c +++ b/drivers/net/ethernet/cortina/gemini.c @@ -2476,6 +2476,11 @@ static int gemini_ethernet_port_probe(struct platform_device *pdev) netdev->hw_features = GMAC_OFFLOAD_FEATURES; netdev->features |= GMAC_OFFLOAD_FEATURES | NETIF_F_GRO; + /* We can handle jumbo frames up to 10236 bytes so, let's accept + * payloads of 10236 bytes minus VLAN and ethernet header + */ + netdev->min_mtu = ETH_MIN_MTU; + netdev->max_mtu = 10236 - VLAN_ETH_HLEN; port->freeq_refill = 0; netif_napi_add(netdev, &port->napi, gmac_napi_poll, -- 2.17.1