[B][D][SRU][PATCH 0/4] Backport MPLS patches from 5.3

[Po-Hsu Lin]

== SRU Justification ==
Mellanox is requesting a backport of the following commit IDs from 5.3
back to 5.0 and 4.15:
* 5dc9520bf04a ("net/mlx5e: Report netdevice MPLS features")
* 8b6912a50193 ("net: vlan: Inherit MPLS features from parent device")
* 2e770b507ccd ("net: bonding: Inherit MPLS features from slave devices")
* e4683f35f8e5 ("net/mlx5e: Move to HW checksumming advertising")

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.

== Fix ==
* 5dc9520bf04a ("net/mlx5e: Report netdevice MPLS features")
* 8b6912a50193 ("net: vlan: Inherit MPLS features from parent device")
* 2e770b507ccd ("net: bonding: Inherit MPLS features from slave devices")
* e4683f35f8e5 ("net/mlx5e: Move to HW checksumming advertising")

The first two patches can be cherry-picked into Disco, and the rest
will require some context adjustment.

== Test ==
Test kernels can be found here:
https://people.canonical.com/~phlin/kernel/lp-1851446-MPLS-0407/

Kernel tested with positive test result and approved by their QA.

== Regression Potential ==
Low, changes just for adding MPLS feature and comes with positive
test result.

Ariel Levkovich (4):
  net/mlx5e: Report netdevice MPLS features
  net: vlan: Inherit MPLS features from parent device
  net: bonding: Inherit MPLS features from slave devices
  net/mlx5e: Move to HW checksumming advertising

 drivers/net/bonding/bond_main.c                   | 11 +++++++++++
 drivers/net/ethernet/mellanox/mlx5/core/en_main.c | 11 +++++++----
 net/8021q/vlan_dev.c                              |  1 +
 3 files changed, 19 insertions(+), 4 deletions(-)

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2.7.4