Commit 25a45172 authored Aug 15, 2019 by Moni Shoua Committed by Doug Ledford Aug 20, 2019

IB/mlx5: Fix MR re-registration flow to use UMR properly



The UMR WQE in the MR re-registration flow requires that
modify_atomic and modify_entity_size capabilities are enabled.
Therefore, check that the these capabilities are present before going to
umr flow and go through slow path if not.

Fixes: c8d75a98 ("IB/mlx5: Respect new UMR capabilities")
Signed-off-by: Moni Shoua <monis@mellanox.com>
Reviewed-by: Guy Levi <guyle@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Link: https://lore.kernel.org/r/20190815083834.9245-8-leon@kernel.org


Signed-off-by: Doug Ledford <dledford@redhat.com>

parent 00815752

drivers/infiniband/hw/mlx5/mr.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -1446,7 +1446,8 @@ int mlx5_ib_rereg_user_mr(struct ib_mr *ib_mr, int flags, u64 start,
		goto err;
		}

		if (flags & IB_MR_REREG_TRANS && !use_umr_mtt_update(mr, addr, len)) {
		if (!mlx5_ib_can_use_umr(dev, true) \|\|
		(flags & IB_MR_REREG_TRANS && !use_umr_mtt_update(mr, addr, len))) {
		/*
		* UMR can't be used - MKey needs to be replaced.
		*/

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