ipq40xx: essedma: Disable TCP segmentation offload for IPv6
authorSven Eckelmann <sven@narfation.org>
Tue, 9 Jun 2020 13:35:04 +0000 (15:35 +0200)
committerChristian Lamparter <chunkeey@gmail.com>
Sat, 13 Jun 2020 12:38:03 +0000 (14:38 +0200)
It was noticed that the the whole MAC can hang when transferring data from
one ar40xx port (WAN ports) to the CPU and from the CPU back to another
ar40xx port (LAN ports). The CPU was doing only NATing in that process.

Usually, the problem first starts with a simple data corruption:

  $ wget https://cdimage.debian.org/debian-cd/current/amd64/iso-cd/debian-10.4.0-amd64-netinst.iso -O /dev/null
  ...
  Connecting to saimei.ftp.acc.umu.se (saimei.ftp.acc.umu.se)|2001:6b0:19::138|:443... connected.
  ...
  Read  error at byte 48807936/352321536 (Decryption has failed.). Retrying.

But after a short while, the whole MAC will stop to react. No traffic can
be transported anymore from the CPU port from/to the AR40xx PHY/switch and
the MAC has to be resetted.

Signed-off-by: Sven Eckelmann <sven@narfation.org>
Acked-by: John Crispin <john@phrozen.org>
target/linux/ipq40xx/files-5.4/drivers/net/ethernet/qualcomm/essedma/edma_axi.c

index b619bbb..96a82b3 100644 (file)
@@ -970,17 +970,14 @@ static int edma_axi_probe(struct platform_device *pdev)
                edma_netdev[i]->features = NETIF_F_HW_CSUM | NETIF_F_RXCSUM
                                      | NETIF_F_HW_VLAN_CTAG_TX
                                      | NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_SG |
-                                     NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_GRO;
+                                     NETIF_F_TSO | NETIF_F_GRO;
                edma_netdev[i]->hw_features = NETIF_F_HW_CSUM | NETIF_F_RXCSUM |
                                NETIF_F_HW_VLAN_CTAG_RX
-                               | NETIF_F_SG | NETIF_F_TSO | NETIF_F_TSO6 |
-                               NETIF_F_GRO;
+                               | NETIF_F_SG | NETIF_F_TSO | NETIF_F_GRO;
                edma_netdev[i]->vlan_features = NETIF_F_HW_CSUM | NETIF_F_SG |
-                                          NETIF_F_TSO | NETIF_F_TSO6 |
-                                          NETIF_F_GRO;
+                                          NETIF_F_TSO | NETIF_F_GRO;
                edma_netdev[i]->wanted_features = NETIF_F_HW_CSUM | NETIF_F_SG |
-                                            NETIF_F_TSO | NETIF_F_TSO6 |
-                                            NETIF_F_GRO;
+                                            NETIF_F_TSO | NETIF_F_GRO;
 
 #ifdef CONFIG_RFS_ACCEL
                edma_netdev[i]->features |=  NETIF_F_RXHASH | NETIF_F_NTUPLE;