From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefan Roese Subject: [PATCH] net: EMAC: Fix problem with mtu > 4080 on non TAH equipped 4xx PPC's Date: Tue, 15 Jan 2008 13:40:09 +0100 Message-ID: <1200400809-19720-1-git-send-email-sr@denx.de> Cc: ebs@ebshome.net, benh@kernel.crashing.org To: linuxppc-dev@ozlabs.org, netdev@vger.kernel.org Return-path: Received: from moutng.kundenserver.de ([212.227.126.188]:61669 "EHLO moutng.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752483AbYAOMkc (ORCPT ); Tue, 15 Jan 2008 07:40:32 -0500 Sender: netdev-owner@vger.kernel.org List-ID: 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 platforms and not only the TAH equipped ones (440GX). This enables an MTU of 9000 instead 4080. Tested on Kilauea (405EX) with gbit link -> jumbo frames enabled. Signed-off-by: Stefan Roese --- Eugene & Ben, do you see any problems with this patch? If not, then I'll send another version for the newemac driver too. Thanks. drivers/net/ibm_emac/ibm_emac_core.c | 10 ++-------- 1 files changed, 2 insertions(+), 8 deletions(-) diff --git a/drivers/net/ibm_emac/ibm_emac_core.c b/drivers/net/ibm_emac/ibm_emac_core.c index 73664f2..198de44 100644 --- a/drivers/net/ibm_emac/ibm_emac_core.c +++ b/drivers/net/ibm_emac/ibm_emac_core.c @@ -1089,7 +1089,6 @@ static int emac_start_xmit(struct sk_buff *skb, struct net_device *ndev) return emac_xmit_finish(dev, len); } -#if defined(CONFIG_IBM_EMAC_TAH) static inline int emac_xmit_split(struct ocp_enet_private *dev, int slot, u32 pd, int len, int last, u16 base_ctrl) { @@ -1203,9 +1202,6 @@ static int emac_start_xmit_sg(struct sk_buff *skb, struct net_device *ndev) DBG2("%d: stopped TX queue" NL, dev->def->index); return 1; } -#else -# define emac_start_xmit_sg emac_start_xmit -#endif /* !defined(CONFIG_IBM_EMAC_TAH) */ /* BHs disabled */ static void emac_parse_tx_error(struct ocp_enet_private *dev, u16 ctrl) @@ -2163,11 +2159,9 @@ static int __init emac_probe(struct ocp_device *ocpdev) /* Fill in the driver function table */ ndev->open = &emac_open; - if (dev->tah_dev) { - ndev->hard_start_xmit = &emac_start_xmit_sg; + ndev->hard_start_xmit = &emac_start_xmit_sg; + if (dev->tah_dev) ndev->features |= NETIF_F_IP_CSUM | NETIF_F_SG; - } else - ndev->hard_start_xmit = &emac_start_xmit; ndev->tx_timeout = &emac_full_tx_reset; ndev->watchdog_timeo = 5 * HZ; ndev->stop = &emac_close; -- 1.5.4.rc3