aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux
diff options
context:
space:
mode:
authorGabor Juhos <juhosg@openwrt.org>2013-12-20 11:41:18 +0000
committerGabor Juhos <juhosg@openwrt.org>2013-12-20 11:41:18 +0000
commit9e7d77de2de40cd6783b0db84b8554012fe3c85b (patch)
tree7c79c97dc4814544c4a614703951189c6f771f0c /target/linux
parent2c4e3cf33a67dd40f34171141f44dde55b8a55ff (diff)
downloadupstream-9e7d77de2de40cd6783b0db84b8554012fe3c85b.tar.gz
upstream-9e7d77de2de40cd6783b0db84b8554012fe3c85b.tar.bz2
upstream-9e7d77de2de40cd6783b0db84b8554012fe3c85b.zip
ar71xx: ag71xx: add ag71xx_max_frame_len() helper
Signed-off-by: Gabor Juhos <juhosg@openwrt.org> SVN-Revision: 39146
Diffstat (limited to 'target/linux')
-rw-r--r--target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c10
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 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;