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[ Upstream commit08aae78604] Previously loopback for MPV was supposed to be permanently enabled, however other driver flows were able to over-ride that configuration and disable it. Add force_lb parameter that indicates that loopback should always be enabled which prevents all other driver flows from disabling it. Fixes:a9a9e68954("RDMA/mlx5: Fix vport loopback for MPV device") Link: https://patch.msgid.link/r/cfc6b1f0f99f8100b087483cc14da6025317f901.1755088808.git.leon@kernel.org Signed-off-by: Patrisious Haddad <phaddad@nvidia.com> Reviewed-by: Mark Bloch <mbloch@nvidia.com> Signed-off-by: Leon Romanovsky <leonro@nvidia.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Signed-off-by: Sasha Levin <sashal@kernel.org>