diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-4.19/950-0127-net-lan78xx-Disable-TCP-Segmentation-Offload-TSO.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-4.19/950-0127-net-lan78xx-Disable-TCP-Segmentation-Offload-TSO.patch | 56 |
1 files changed, 0 insertions, 56 deletions
diff --git a/target/linux/bcm27xx/patches-4.19/950-0127-net-lan78xx-Disable-TCP-Segmentation-Offload-TSO.patch b/target/linux/bcm27xx/patches-4.19/950-0127-net-lan78xx-Disable-TCP-Segmentation-Offload-TSO.patch deleted file mode 100644 index bd9987d8ad..0000000000 --- a/target/linux/bcm27xx/patches-4.19/950-0127-net-lan78xx-Disable-TCP-Segmentation-Offload-TSO.patch +++ /dev/null @@ -1,56 +0,0 @@ -From 59555269e09f06ae0ded9007c4aa02fa55ce71ca 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] 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 -@@ -440,6 +440,15 @@ static int msg_level = -1; - module_param(msg_level, int, 0); - MODULE_PARM_DESC(msg_level, "Override default message level"); - -+/* 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 = kmalloc(sizeof(u32), GFP_KERNEL); -@@ -3010,8 +3019,14 @@ 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; |