Commit c55a2cff authored by Daniel Axtens's avatar Daniel Axtens Committed by Greg Kroah-Hartman
Browse files

bnx2x: disable GSO where gso_size is too big for hardware

commit 8914a595


If a bnx2x card is passed a GSO packet with a gso_size larger than
~9700 bytes, it will cause a firmware error that will bring the card

bnx2x: [bnx2x_attn_int_deasserted3:4323(enP24p1s0f0)]MC assert!
bnx2x: [bnx2x_mc_assert:720(enP24p1s0f0)]XSTORM_ASSERT_LIST_INDEX 0x2
bnx2x: [bnx2x_mc_assert:736(enP24p1s0f0)]XSTORM_ASSERT_INDEX 0x0 = 0x00000000 0x25e43e47 0x00463e01 0x00010052
bnx2x: [bnx2x_mc_assert:750(enP24p1s0f0)]Chip Revision: everest3, FW Version: 7_13_1
... (dump of values continues) ...

Detect when the mac length of a GSO packet is greater than the maximum
packet size (9700 bytes) and disable GSO.

Signed-off-by: default avatarDaniel Axtens <>
Reviewed-by: default avatarEric Dumazet <>
Signed-off-by: default avatarDavid S. Miller <>
Signed-off-by: default avatarBen Hutchings <>
Signed-off-by: default avatarGreg Kroah-Hartman <>
parent a33b6d4c
......@@ -12824,6 +12824,24 @@ static netdev_features_t bnx2x_features_check(struct sk_buff *skb,
struct net_device *dev,
netdev_features_t features)
* A skb with gso_size + header length > 9700 will cause a
* firmware panic. Drop GSO support.
* Eventually the upper layer should not pass these packets down.
* For speed, if the gso_size is <= 9000, assume there will
* not be 700 bytes of headers and pass it through. Only do a
* full (slow) validation if the gso_size is > 9000.
* (Due to the way SKB_BY_FRAGS works this will also do a full
* validation in that case.)
if (unlikely(skb_is_gso(skb) &&
(skb_shinfo(skb)->gso_size > 9000) &&
!skb_gso_validate_mac_len(skb, 9700)))
features &= ~NETIF_F_GSO_MASK;
features = vlan_features_check(skb, features);
return vxlan_features_check(skb, features);
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