mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-23 23:42:43 +00:00
8c405cdccc
The patches were generated from the RPi repo with the following command: git format-patch v6.6.34..rpi-6.1.y Some patches needed rebasing and, as usual, the applied and reverted, wireless drivers, Github workflows, READMEs and defconfigs patches were removed. Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
58 lines
2.0 KiB
Diff
58 lines
2.0 KiB
Diff
From 6fa07a5a10e7724c34d51b12187a138e85775433 Mon Sep 17 00:00:00 2001
|
|
From: Dave Stevenson <dave.stevenson@raspberrypi.org>
|
|
Date: Wed, 13 Jun 2018 15:21:10 +0100
|
|
Subject: [PATCH 0125/1085] net: lan78xx: Disable TCP Segmentation Offload
|
|
(TSO)
|
|
|
|
TSO seems to be having issues when packets are dropped and the
|
|
remote end uses Selective Acknowledge (SACK) to denote that
|
|
data is missing. The missing data is never resent, so the
|
|
connection eventually stalls.
|
|
|
|
There is a module parameter of enable_tso added to allow
|
|
further debugging without forcing a rebuild of the kernel.
|
|
|
|
https://github.com/raspberrypi/linux/issues/2449
|
|
https://github.com/raspberrypi/linux/issues/2482
|
|
|
|
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
|
|
---
|
|
drivers/net/usb/lan78xx.c | 19 +++++++++++++++++--
|
|
1 file changed, 17 insertions(+), 2 deletions(-)
|
|
|
|
--- a/drivers/net/usb/lan78xx.c
|
|
+++ b/drivers/net/usb/lan78xx.c
|
|
@@ -609,6 +609,15 @@ static int lan78xx_alloc_tx_resources(st
|
|
dev->n_tx_urbs, dev->tx_urb_size, dev);
|
|
}
|
|
|
|
+/* TSO seems to be having some issue with Selective Acknowledge (SACK) that
|
|
+ * results in lost data never being retransmitted.
|
|
+ * Disable it by default now, but adds a module parameter to enable it for
|
|
+ * debug purposes (the full cause is not currently understood).
|
|
+ */
|
|
+static bool enable_tso;
|
|
+module_param(enable_tso, bool, 0644);
|
|
+MODULE_PARM_DESC(enable_tso, "Enables TCP segmentation offload");
|
|
+
|
|
static int lan78xx_read_reg(struct lan78xx_net *dev, u32 index, u32 *data)
|
|
{
|
|
u32 *buf;
|
|
@@ -3471,8 +3480,14 @@ static int lan78xx_bind(struct lan78xx_n
|
|
if (DEFAULT_RX_CSUM_ENABLE)
|
|
dev->net->features |= NETIF_F_RXCSUM;
|
|
|
|
- if (DEFAULT_TSO_CSUM_ENABLE)
|
|
- dev->net->features |= NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_SG;
|
|
+ if (DEFAULT_TSO_CSUM_ENABLE) {
|
|
+ dev->net->features |= NETIF_F_SG;
|
|
+ /* Use module parameter to control TCP segmentation offload as
|
|
+ * it appears to cause issues.
|
|
+ */
|
|
+ if (enable_tso)
|
|
+ dev->net->features |= NETIF_F_TSO | NETIF_F_TSO6;
|
|
+ }
|
|
|
|
if (DEFAULT_VLAN_RX_OFFLOAD)
|
|
dev->net->features |= NETIF_F_HW_VLAN_CTAG_RX;
|