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From: Leon Romanovsky <leon@kernel.org>
To: Doug Ledford <dledford@redhat.com>, Jason Gunthorpe <jgg@mellanox.com>
Cc: Leon Romanovsky <leonro@mellanox.com>,
	RDMA mailing list <linux-rdma@vger.kernel.org>,
	Alex Vainman <alexv@mellanox.com>,
	Artemy Kovalyov <artemyko@mellanox.com>,
	Daniel Jurgens <danielj@mellanox.com>,
	Eli Cohen <eli@mellanox.com>, Haggai Eran <haggaie@mellanox.com>,
	Mark Zhang <markz@mellanox.com>, Moni Shoua <monis@mellanox.com>,
	Parav Pandit <parav@mellanox.com>,
	Sagi Grimberg <sagig@mellanox.com>,
	Yishai Hadas <yishaih@mellanox.com>
Subject: [PATCH rdma-rc 05/10] IB/mlx5: Fix clean_mr() to work in the expected order
Date: Tue, 23 Jul 2019 09:57:28 +0300
Message-ID: <20190723065733.4899-6-leon@kernel.org> (raw)
In-Reply-To: <20190723065733.4899-1-leon@kernel.org>

From: Yishai Hadas <yishaih@mellanox.com>

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().

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>
---
 drivers/infiniband/hw/mlx5/mr.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/infiniband/hw/mlx5/mr.c b/drivers/infiniband/hw/mlx5/mr.c
index 7274a9b9df58..2c77456f359f 100644
--- a/drivers/infiniband/hw/mlx5/mr.c
+++ b/drivers/infiniband/hw/mlx5/mr.c
@@ -1582,10 +1582,10 @@ static void clean_mr(struct mlx5_ib_dev *dev, struct mlx5_ib_mr *mr)
 		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)
--
2.20.1


  parent reply index

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-07-23  6:57 [PATCH rdma-rc 00/10] Collection of fixes for 5.3 Leon Romanovsky
2019-07-23  6:57 ` [PATCH rdma-rc 01/10] RDMA/core: Annotate destroy of mutex to ensure that it is released as unlocked Leon Romanovsky
2019-07-23  6:57 ` [PATCH rdma-rc 02/10] IB/mlx5: Fix unreg_umr to ignore the mkey state Leon Romanovsky
2019-07-23  6:57 ` [PATCH rdma-rc 03/10] IB/mlx5: Use direct mkey destroy command upon UMR unreg failure Leon Romanovsky
2019-07-23  6:57 ` [PATCH rdma-rc 04/10] IB/mlx5: Fix unreg_umr to set a device PD Leon Romanovsky
2019-07-23  6:57 ` Leon Romanovsky [this message]
2019-07-23  6:57 ` [PATCH rdma-rc 06/10] IB/mlx5: Fix RSS Toeplitz function to be specification aligned Leon Romanovsky
2019-07-23  6:57 ` [PATCH rdma-rc 07/10] IB/mlx5: Prevent concurrent MR updates during invalidation Leon Romanovsky
2019-07-23  6:57 ` [PATCH rdma-rc 08/10] IB/mlx5: Avoid unnecessary typecast Leon Romanovsky
2019-07-23  6:57 ` [PATCH rdma-rc 09/10] IB/core: Fix querying total rdma stats Leon Romanovsky
2019-07-23  6:57 ` [PATCH rdma-rc 10/10] IB/counters: Initialize port counter and annotate mutex_destroy Leon Romanovsky
2019-07-25 14:32   ` Jason Gunthorpe
2019-07-25 15:13 ` [PATCH rdma-rc 00/10] Collection of fixes for 5.3 Jason Gunthorpe
2019-07-25 16:05   ` Parav Pandit

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