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| author | Gabor Juhos <juhosg@openwrt.org> | 2013-12-20 11:41:18 +0000 |
|---|---|---|
| committer | Gabor Juhos <juhosg@openwrt.org> | 2013-12-20 11:41:18 +0000 |
| commit | 9e7d77de2de40cd6783b0db84b8554012fe3c85b (patch) | |
| tree | 7c79c97dc4814544c4a614703951189c6f771f0c /target | |
| parent | 2c4e3cf33a67dd40f34171141f44dde55b8a55ff (diff) | |
| download | mtk-20170518-9e7d77de2de40cd6783b0db84b8554012fe3c85b.zip mtk-20170518-9e7d77de2de40cd6783b0db84b8554012fe3c85b.tar.gz mtk-20170518-9e7d77de2de40cd6783b0db84b8554012fe3c85b.tar.bz2 | |
ar71xx: ag71xx: add ag71xx_max_frame_len() helper
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 39146
Diffstat (limited to 'target')
| -rw-r--r-- | target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c | 10 |
1 files 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 9df27ff..ce05c10 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; |