diff options
Diffstat (limited to 'drivers/net/ethernet/mellanox')
-rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/en_rx.c | 45 |
1 files changed, 9 insertions, 36 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c index 94224c22ecc3..79638dcbae78 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c @@ -713,43 +713,15 @@ static inline void mlx5e_enable_ecn(struct mlx5e_rq *rq, struct sk_buff *skb) rq->stats->ecn_mark += !!rc; } -static __be32 mlx5e_get_fcs(struct sk_buff *skb) +static u32 mlx5e_get_fcs(const struct sk_buff *skb) { - int last_frag_sz, bytes_in_prev, nr_frags; - u8 *fcs_p1, *fcs_p2; - skb_frag_t *last_frag; - __be32 fcs_bytes; + const void *fcs_bytes; + u32 _fcs_bytes; - if (!skb_is_nonlinear(skb)) - return *(__be32 *)(skb->data + skb->len - ETH_FCS_LEN); + fcs_bytes = skb_header_pointer(skb, skb->len - ETH_FCS_LEN, + ETH_FCS_LEN, &_fcs_bytes); - nr_frags = skb_shinfo(skb)->nr_frags; - last_frag = &skb_shinfo(skb)->frags[nr_frags - 1]; - last_frag_sz = skb_frag_size(last_frag); - - /* If all FCS data is in last frag */ - if (last_frag_sz >= ETH_FCS_LEN) - return *(__be32 *)(skb_frag_address(last_frag) + - last_frag_sz - ETH_FCS_LEN); - - fcs_p2 = (u8 *)skb_frag_address(last_frag); - bytes_in_prev = ETH_FCS_LEN - last_frag_sz; - - /* Find where the other part of the FCS is - Linear or another frag */ - if (nr_frags == 1) { - fcs_p1 = skb_tail_pointer(skb); - } else { - skb_frag_t *prev_frag = &skb_shinfo(skb)->frags[nr_frags - 2]; - - fcs_p1 = skb_frag_address(prev_frag) + - skb_frag_size(prev_frag); - } - fcs_p1 -= bytes_in_prev; - - memcpy(&fcs_bytes, fcs_p1, bytes_in_prev); - memcpy(((u8 *)&fcs_bytes) + bytes_in_prev, fcs_p2, last_frag_sz); - - return fcs_bytes; + return __get_unaligned_cpu32(fcs_bytes); } static u8 get_ip_proto(struct sk_buff *skb, __be16 proto) @@ -797,8 +769,9 @@ static inline void mlx5e_handle_csum(struct net_device *netdev, network_depth - ETH_HLEN, skb->csum); if (unlikely(netdev->features & NETIF_F_RXFCS)) - skb->csum = csum_add(skb->csum, - (__force __wsum)mlx5e_get_fcs(skb)); + skb->csum = csum_block_add(skb->csum, + (__force __wsum)mlx5e_get_fcs(skb), + skb->len - ETH_FCS_LEN); stats->csum_complete++; return; } |