diff options
| -rw-r--r-- | target/linux/ramips/files/drivers/net/ethernet/ralink/ralink_soc_eth.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/target/linux/ramips/files/drivers/net/ethernet/ralink/ralink_soc_eth.c b/target/linux/ramips/files/drivers/net/ethernet/ralink/ralink_soc_eth.c index 2691cfb710..05b810a78a 100644 --- a/target/linux/ramips/files/drivers/net/ethernet/ralink/ralink_soc_eth.c +++ b/target/linux/ramips/files/drivers/net/ethernet/ralink/ralink_soc_eth.c @@ -32,6 +32,7 @@ #include <linux/reset.h> #include <linux/tcp.h> #include <linux/io.h> +#include <linux/bug.h> #include <asm/mach-ralink/ralink_regs.h> @@ -41,8 +42,8 @@ #include "ralink_ethtool.h" #define MAX_RX_LENGTH 1536 -#define FE_RX_HLEN (NET_SKB_PAD + VLAN_ETH_HLEN + VLAN_HLEN + \ - + NET_IP_ALIGN + ETH_FCS_LEN) +#define FE_RX_ETH_HLEN (VLAN_ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN) +#define FE_RX_HLEN (NET_SKB_PAD + FE_RX_ETH_HLEN + NET_IP_ALIGN) #define DMA_DUMMY_DESC 0xffffffff #define FE_DEFAULT_MSG_ENABLE \ (NETIF_MSG_DRV | \ @@ -172,14 +173,21 @@ static int fe_set_mac_address(struct net_device *dev, void *p) static inline int fe_max_frag_size(int mtu) { + /* make sure buf_size will be at least MAX_RX_LENGTH */ + if (mtu + FE_RX_ETH_HLEN < MAX_RX_LENGTH) + mtu = MAX_RX_LENGTH - FE_RX_ETH_HLEN; + return SKB_DATA_ALIGN(FE_RX_HLEN + mtu) + SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); } static inline int fe_max_buf_size(int frag_size) { - return frag_size - NET_SKB_PAD - NET_IP_ALIGN - - SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); + int buf_size = frag_size - NET_SKB_PAD - NET_IP_ALIGN - + SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); + + BUG_ON(buf_size < MAX_RX_LENGTH); + return buf_size; } static inline void fe_get_rxd(struct fe_rx_dma *rxd, struct fe_rx_dma *dma_rxd) |