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authorPavel Belous <pavel.belous@aquantia.com>2017-08-28 21:52:10 +0300
committerDavid S. Miller <davem@davemloft.net>2017-08-29 15:11:43 -0700
commit0a402e7b9725611069dad4c873d1516f8c805f38 (patch)
tree99f6447fb4d18b4cfdba3fcd8072bae76ae33ed3 /drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_a0.c
parent64fc7953ffd9424726988dd04945c28141ee41af (diff)
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/atlantic/hw_atl/hw_atl_a0.c')
-rw-r--r--drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_a0.c6
1 files changed, 6 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;