From ee63d22b8953fd0dde22f52c0bc17a304ae50403 Mon Sep 17 00:00:00 2001 From: Stefan Roese Date: Wed, 16 Jan 2008 08:11:15 +0100 Subject: [PATCH] net: NEWEMAC: Fix problem with mtu > 4080 on non TAH equipped 4xx PPC's Currently, all non TAH equipped 4xx PPC's call emac_start_xmit() upon xmit. This routine doesn't check if the frame length exceeds the max. MAL buffer size. This patch now changes the driver to call emac_start_xmit_sg() on all GigE platforms and not only the TAH equipped ones (440GX). This enables an MTU of 9000 instead 4080. Signed-off-by: Stefan Roese Signed-off-by: Jeff Garzik --- drivers/net/ibm_newemac/core.c | 14 ++++---------- 1 file changed, 4 insertions(+), 10 deletions(-) diff --git a/drivers/net/ibm_newemac/core.c b/drivers/net/ibm_newemac/core.c index cb06280dced5..b24bd2dfb725 100644 --- a/drivers/net/ibm_newemac/core.c +++ b/drivers/net/ibm_newemac/core.c @@ -1297,7 +1297,6 @@ static int emac_start_xmit(struct sk_buff *skb, struct net_device *ndev) return emac_xmit_finish(dev, len); } -#ifdef CONFIG_IBM_NEW_EMAC_TAH static inline int emac_xmit_split(struct emac_instance *dev, int slot, u32 pd, int len, int last, u16 base_ctrl) { @@ -1410,9 +1409,6 @@ static int emac_start_xmit_sg(struct sk_buff *skb, struct net_device *ndev) DBG2(dev, "stopped TX queue" NL); return 1; } -#else -# define emac_start_xmit_sg emac_start_xmit -#endif /* !defined(CONFIG_IBM_NEW_EMAC_TAH) */ /* Tx lock BHs */ static void emac_parse_tx_error(struct emac_instance *dev, u16 ctrl) @@ -2683,13 +2679,8 @@ static int __devinit emac_probe(struct of_device *ofdev, /* Fill in the driver function table */ ndev->open = &emac_open; -#ifdef CONFIG_IBM_NEW_EMAC_TAH - if (dev->tah_dev) { - ndev->hard_start_xmit = &emac_start_xmit_sg; + if (dev->tah_dev) ndev->features |= NETIF_F_IP_CSUM | NETIF_F_SG; - } else -#endif - ndev->hard_start_xmit = &emac_start_xmit; ndev->tx_timeout = &emac_tx_timeout; ndev->watchdog_timeo = 5 * HZ; ndev->stop = &emac_close; @@ -2697,8 +2688,11 @@ static int __devinit emac_probe(struct of_device *ofdev, ndev->set_multicast_list = &emac_set_multicast_list; ndev->do_ioctl = &emac_ioctl; if (emac_phy_supports_gige(dev->phy_mode)) { + ndev->hard_start_xmit = &emac_start_xmit_sg; ndev->change_mtu = &emac_change_mtu; dev->commac.ops = &emac_commac_sg_ops; + } else { + ndev->hard_start_xmit = &emac_start_xmit; } SET_ETHTOOL_OPS(ndev, &emac_ethtool_ops); -- 2.20.1