From: Yishai Hadas <[email protected]> commit b9332dad987018745a0c0bb718d12dacfa760489 upstream.
Any dma map underlying the MR should only be freed once the MR is fenced at the hardware. As of the above we first destroy the MKEY and just after that can safely call to dma_unmap_single(). Link: https://lore.kernel.org/r/[email protected] Cc: <[email protected]> # 4.3 Fixes: 8a187ee52b04 ("IB/mlx5: Support the new memory registration API") Signed-off-by: Yishai Hadas <[email protected]> Reviewed-by: Artemy Kovalyov <[email protected]> Signed-off-by: Leon Romanovsky <[email protected]> Reviewed-by: Jason Gunthorpe <[email protected]> Signed-off-by: Jason Gunthorpe <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/infiniband/hw/mlx5/mr.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) --- a/drivers/infiniband/hw/mlx5/mr.c +++ b/drivers/infiniband/hw/mlx5/mr.c @@ -1620,10 +1620,10 @@ static void clean_mr(struct mlx5_ib_dev mr->sig = NULL; } - mlx5_free_priv_descs(mr); - - if (!allocated_from_cache) + if (!allocated_from_cache) { destroy_mkey(dev, mr); + mlx5_free_priv_descs(mr); + } } static void dereg_mr(struct mlx5_ib_dev *dev, struct mlx5_ib_mr *mr)
