diff options
| author | Pavel Belous <pavel.belous@aquantia.com> | 2017-08-28 21:52:10 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-08-29 15:11:43 -0700 |
| commit | 0a402e7b9725611069dad4c873d1516f8c805f38 (patch) | |
| tree | 99f6447fb4d18b4cfdba3fcd8072bae76ae33ed3 /drivers/net/ethernet/aquantia | |
| parent | 64fc7953ffd9424726988dd04945c28141ee41af (diff) | |
| download | linux-0a402e7b9725611069dad4c873d1516f8c805f38.tar.bz2 | |
net:ethernet:aquantia: Workaround for HW checksum bug.
The hardware has the HW Checksum Offload bug when small
TCP patckets (with length <= 60 bytes) has wrong "checksum valid" bit.
The solution is - ignore checksum valid bit for small packets
(with length <= 60 bytes) and mark this as CHECKSUM_NONE to allow
network stack recalculate checksum itself.
Fixes: ccf9a5ed14be ("net: ethernet: aquantia: Atlantic A0 and B0 specific functions.")
Signed-off-by: Pavel Belous <Pavel.Belous@aquantia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/aquantia')
| -rw-r--r-- | drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_a0.c | 6 | ||||
| -rw-r--r-- | drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c | 6 |
2 files changed, 12 insertions, 0 deletions
diff --git a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_a0.c b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_a0.c index faeb4935ef3e..c5a02df7a48b 100644 --- a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_a0.c +++ b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_a0.c @@ -629,6 +629,12 @@ static int hw_atl_a0_hw_ring_rx_receive(struct aq_hw_s *self, buff->is_udp_cso = (is_err & 0x10U) ? 0 : 1; else if (0x0U == (pkt_type & 0x1CU)) buff->is_tcp_cso = (is_err & 0x10U) ? 0 : 1; + + /* Checksum offload workaround for small packets */ + if (rxd_wb->pkt_len <= 60) { + buff->is_ip_cso = 0U; + buff->is_cso_err = 0U; + } } is_err &= ~0x18U; diff --git a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c index 1bceb7358e5c..21784cc39dab 100644 --- a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c +++ b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c @@ -645,6 +645,12 @@ static int hw_atl_b0_hw_ring_rx_receive(struct aq_hw_s *self, buff->is_udp_cso = buff->is_cso_err ? 0U : 1U; else if (0x0U == (pkt_type & 0x1CU)) buff->is_tcp_cso = buff->is_cso_err ? 0U : 1U; + + /* Checksum offload workaround for small packets */ + if (rxd_wb->pkt_len <= 60) { + buff->is_ip_cso = 0U; + buff->is_cso_err = 0U; + } } is_err &= ~0x18U; |