4.19-stable review patch. If anyone has any objections, please let me know.
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[ Upstream commit 75b7b86bdb0df37e08e44b6c1f99010967f81944 ]
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 Signed-off-by: Sasha Levin sashal@kernel.org --- 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 d216e0d2921d..9e1cac8cb260 100644 --- a/drivers/infiniband/hw/mlx5/odp.c +++ b/drivers/infiniband/hw/mlx5/odp.c @@ -724,6 +724,7 @@ static int pagefault_single_data_segment(struct mlx5_ib_dev *dev, head = frame;
bcnt -= frame->bcnt; + offset = 0; } break;