3.19.8-ckt4 -stable review patch. If anyone has any objections, please let me know.
------------------
From: Ido Shamay <idos@xxxxxxxxxxxx>
[ Upstream commit 79a258526ce1051cb9684018c25a89d51ac21be8 ]
The check_csum() function relied on hwtstamp_rx_filter to know if rxvlan
offload is disabled. This is wrong since rxvlan offload can be switched
on/off regardless of hwtstamp_rx_filter.
Also moved check_csum to query CQE information to identify VLAN packets
and removed the check of IP packets, since it has been validated before.
Fixes: f8c6455bb04b ('net/mlx4_en: Extend checksum offloading by CHECKSUM COMPLETE')
Signed-off-by: Ido Shamay <idos@xxxxxxxxxxxx>
Signed-off-by: Or Gerlitz <ogerlitz@xxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Kamal Mostafa <kamal@xxxxxxxxxxxxx>
---
drivers/net/ethernet/mellanox/mlx4/en_rx.c | 17 ++++++-----------
1 file changed, 6 insertions(+), 11 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_rx.c b/drivers/net/ethernet/mellanox/mlx4/en_rx.c
index 10d3533..7f16627 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_rx.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_rx.c
@@ -719,7 +719,7 @@ static int get_fixed_ipv6_csum(__wsum hw_checksum, struct sk_buff *skb,
}
#endif
static int check_csum(struct mlx4_cqe *cqe, struct sk_buff *skb, void *va,
- int hwtstamp_rx_filter)
+ netdev_features_t dev_features)
{
__wsum hw_checksum = 0;
@@ -727,14 +727,8 @@ static int check_csum(struct mlx4_cqe *cqe, struct sk_buff *skb, void *va,
hw_checksum = csum_unfold((__force __sum16)cqe->checksum);
- if (((struct ethhdr *)va)->h_proto == htons(ETH_P_8021Q) &&
- hwtstamp_rx_filter != HWTSTAMP_FILTER_NONE) {
- /* next protocol non IPv4 or IPv6 */
- if (((struct vlan_hdr *)hdr)->h_vlan_encapsulated_proto
- != htons(ETH_P_IP) &&
- ((struct vlan_hdr *)hdr)->h_vlan_encapsulated_proto
- != htons(ETH_P_IPV6))
- return -1;
+ if (cqe->vlan_my_qpn & cpu_to_be32(MLX4_CQE_VLAN_PRESENT_MASK) &&
+ !(dev_features & NETIF_F_HW_VLAN_CTAG_RX)) {
hw_checksum = get_fixed_vlan_csum(hw_checksum, hdr);
hdr += sizeof(struct vlan_hdr);
}
@@ -897,7 +891,8 @@ int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int bud
if (ip_summed == CHECKSUM_COMPLETE) {
void *va = skb_frag_address(skb_shinfo(gro_skb)->frags);
- if (check_csum(cqe, gro_skb, va, ring->hwtstamp_rx_filter)) {
+ if (check_csum(cqe, gro_skb, va,
+ dev->features)) {
ip_summed = CHECKSUM_NONE;
ring->csum_none++;
ring->csum_complete--;
@@ -952,7 +947,7 @@ int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int bud
}
if (ip_summed == CHECKSUM_COMPLETE) {
- if (check_csum(cqe, skb, skb->data, ring->hwtstamp_rx_filter)) {
+ if (check_csum(cqe, skb, skb->data, dev->features)) {
ip_summed = CHECKSUM_NONE;
ring->csum_complete--;
ring->csum_none++;
--
1.9.1
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