From 75b7b86bdb0df37e08e44b6c1f99010967f81944 Mon Sep 17 00:00:00 2001
From: Artemy Kovalyov <artemyko@mellanox.com>
Date: Sun, 25 Nov 2018 20:34:26 +0200
Subject: [PATCH] IB/mlx5: Fix page fault handling for MW
Memory windows are implemented with an indirect MKey, when a page fault
event comes for a MW Mkey we need to find the MR at the end of the list of
the indirect MKeys by iterating on all items from the first to the last.
The offset calculated during this process has to be zeroed after the first
iteration or the next iteration will start from a wrong address, resulting
incorrect ODP faulting behavior.
Fixes: db570d7deafb ("IB/mlx5: Add ODP support to MW")
Signed-off-by: Artemy Kovalyov <artemyko@mellanox.com>
Signed-off-by: Moni Shoua <monis@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
---
drivers/infiniband/hw/mlx5/odp.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/infiniband/hw/mlx5/odp.c b/drivers/infiniband/hw/mlx5/odp.c
index 2a0743808bd83..b711a0f3aa353 100644
--- a/drivers/infiniband/hw/mlx5/odp.c
+++ b/drivers/infiniband/hw/mlx5/odp.c
@@ -743,6 +743,7 @@ static int pagefault_single_data_segment(struct mlx5_ib_dev *dev,
head = frame;
bcnt -= frame->bcnt;
+ offset = 0;
}
break;
--
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