diff options
| -rw-r--r-- | target/linux/ipq40xx/patches-4.14/713-essedma-Disable-TCP-segmentation-offload-for-IPv6.patch | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/target/linux/ipq40xx/patches-4.14/713-essedma-Disable-TCP-segmentation-offload-for-IPv6.patch b/target/linux/ipq40xx/patches-4.14/713-essedma-Disable-TCP-segmentation-offload-for-IPv6.patch new file mode 100644 index 0000000000..bb36af7c73 --- /dev/null +++ b/target/linux/ipq40xx/patches-4.14/713-essedma-Disable-TCP-segmentation-offload-for-IPv6.patch @@ -0,0 +1,46 @@ +From: Sven Eckelmann <sven@narfation.org> +Date: Tue, 9 Jun 2020 14:08:44 +0200 +Subject: essedma: Disable TCP segmentation offload for IPv6 + +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> + +--- a/drivers/net/ethernet/qualcomm/essedma/edma_axi.c ++++ b/drivers/net/ethernet/qualcomm/essedma/edma_axi.c +@@ -972,17 +972,14 @@ static int edma_axi_probe(struct platfor + 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; |