From 9e7d77de2de40cd6783b0db84b8554012fe3c85b Mon Sep 17 00:00:00 2001 From: Gabor Juhos Date: Fri, 20 Dec 2013 11:41:18 +0000 Subject: [PATCH] ar71xx: ag71xx: add ag71xx_max_frame_len() helper Signed-off-by: Gabor Juhos SVN-Revision: 39146 --- .../drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c b/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c index 9df27ff1a9..ce05c10882 100644 --- a/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c +++ b/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c @@ -28,6 +28,11 @@ static int ag71xx_msg_level = -1; module_param_named(msg_level, ag71xx_msg_level, int, 0); MODULE_PARM_DESC(msg_level, "Message level (-1=defaults,0=none,...,16=all)"); +static inline unsigned int ag71xx_max_frame_len(unsigned int mtu) +{ + return ETH_HLEN + VLAN_HLEN + mtu + ETH_FCS_LEN; +} + static void ag71xx_dump_dma_regs(struct ag71xx *ag) { DBG("%s: dma_tx_ctrl=%08x, dma_tx_desc=%08x, dma_tx_status=%08x\n", @@ -1052,9 +1057,10 @@ static void ag71xx_netpoll(struct net_device *dev) static int ag71xx_change_mtu(struct net_device *dev, int new_mtu) { struct ag71xx *ag = netdev_priv(dev); + unsigned int max_frame_len; - if (new_mtu < 68 || - new_mtu > ag->max_frame_len - ETH_HLEN - ETH_FCS_LEN) + max_frame_len = ag71xx_max_frame_len(new_mtu); + if (new_mtu < 68 || max_frame_len > ag->max_frame_len) return -EINVAL; dev->mtu = new_mtu; -- 2.30.2