Public bug reported:

Mellanox is requesting a backport of the following commit IDs from 5.3
back to 4.15.

Netdevice HW MPLS features are not passed from device driver's netdevice to
upper netdevice, specifically VLAN and bonding netdevice which are created
by the kernel when needed.

This prevents enablement and usage of HW offloads, such as TSO and checksumming
for MPLS tagged traffic when running via VLAN or bonding interface.

The patches introduce changes to the initialization steps of the VLAN and 
bonding
netdevices to inherit the MPLS features from lower netdevices to allow the HW
offloads.

Ariel Levkovich (2):
  net: bonding: Inherit MPLS features from slave devices
  net: vlan: Inherit MPLS features from parent device

 drivers/net/bonding/bond_main.c | 11 +++++++++++
 net/8021q/vlan_dev.c            |  1 +
 2 files changed, 12 insertions(+)

https://www.mail-archive.com/netdev@vger.kernel.org/msg299084.html

Commit IDs (All landed in 5.3)
600bb0318c18e9616d97ad123caaa7c5f7bf222c
8b6912a5019356d7adb1b8a146c9eef5e679bf98
2e770b507ccde8eedc129946e4b78ceed0a22df2

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1851446

Title:
  Backport MPLS patches from 5.3 to 4.15

Status in linux package in Ubuntu:
  New

Bug description:
  Mellanox is requesting a backport of the following commit IDs from 5.3
  back to 4.15.

  Netdevice HW MPLS features are not passed from device driver's netdevice to
  upper netdevice, specifically VLAN and bonding netdevice which are created
  by the kernel when needed.

  This prevents enablement and usage of HW offloads, such as TSO and 
checksumming
  for MPLS tagged traffic when running via VLAN or bonding interface.

  The patches introduce changes to the initialization steps of the VLAN and 
  bonding
  netdevices to inherit the MPLS features from lower netdevices to allow the HW
  offloads.

  Ariel Levkovich (2):
    net: bonding: Inherit MPLS features from slave devices
    net: vlan: Inherit MPLS features from parent device

   drivers/net/bonding/bond_main.c | 11 +++++++++++
   net/8021q/vlan_dev.c            |  1 +
   2 files changed, 12 insertions(+)

  https://www.mail-archive.com/netdev@vger.kernel.org/msg299084.html

  Commit IDs (All landed in 5.3)
  600bb0318c18e9616d97ad123caaa7c5f7bf222c
  8b6912a5019356d7adb1b8a146c9eef5e679bf98
  2e770b507ccde8eedc129946e4b78ceed0a22df2

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