From: Yishai Hadas yishaih@mellanox.com
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/20190723065733.4899-6-leon@kernel.org Cc: stable@vger.kernel.org # 4.3 Fixes: 8a187ee52b04 ("IB/mlx5: Support the new memory registration API") Signed-off-by: Yishai Hadas yishaih@mellanox.com Reviewed-by: Artemy Kovalyov artemyko@mellanox.com Signed-off-by: Leon Romanovsky leonro@mellanox.com Reviewed-by: Jason Gunthorpe jgg@mellanox.com Signed-off-by: Jason Gunthorpe jgg@mellanox.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- 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 @@ -1583,10 +1583,10 @@ 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)