Comment 0 for bug 1872726

Issue found in the Mellanox mlx5 device driver:

The mask value is provided as 64 bit and has to be casted in
either 32 or 16 bit. On big endian systems the wrong half was
casted which resulted in an all zero mask.

We need to get the upstream commit picked up for the Ubuntu 20.04 kernel.

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=404402abd5f90aa90a134eb9604b1750c1941529