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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: db570d7dea ("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>
This commit is contained in:
Artemy Kovalyov 2018-11-25 20:34:26 +02:00 committed by Jason Gunthorpe
parent 605728e65a
commit 75b7b86bdb
1 changed files with 1 additions and 0 deletions
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drivers/infiniband/hw/mlx5/odp.c
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@ -743,6 +743,7 @@ static int pagefault_single_data_segment(struct mlx5_ib_dev *dev,
head = frame;
bcnt -= frame->bcnt;
offset = 0;
}
break;