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vfio/mlx5: Block incremental query upon migf state error

Block incremental query which is state-dependent once the migration file
was previously marked with state error.

This may prevent redundant calls to firmware upon PRE_COPY which will
end-up with a failure and a syndrome printed in dmesg.

Signed-off-by: Yishai Hadas <yishaih@nvidia.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Acked-by: Leon Romanovsky <leon@kernel.org>
Link: https://lore.kernel.org/r/20240205124828.232701-5-yishaih@nvidia.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>

authored by

Yishai Hadas and committed by
Alex Williamson d8d577b5 793d4bfa

+5
+5
drivers/vfio/pci/mlx5/cmd.c
··· 121 121 } 122 122 query_flags &= ~MLX5VF_QUERY_INC; 123 123 } 124 + /* Block incremental query which is state-dependent */ 125 + if (mvdev->saving_migf->state == MLX5_MIGF_STATE_ERROR) { 126 + complete(&mvdev->saving_migf->save_comp); 127 + return -ENODEV; 128 + } 124 129 } 125 130 126 131 MLX5_SET(query_vhca_migration_state_in, in, opcode,