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| author | Artemy Kovalyov <artemyko@mellanox.com> | 2017-04-05 09:23:51 +0300 |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2017-04-25 15:40:28 -0400 |
| commit | bd174fc2ca63f1c833a09f930796d789fb1f5361 (patch) | |
| tree | 412988c919303bc48fce6a4ef10b6d8271f642e9 | |
| parent | 3e7e1193e28a1428e857f3f44870ec2dbd615e6a (diff) | |
| download | linux-bd174fc2ca63f1c833a09f930796d789fb1f5361.tar.gz linux-bd174fc2ca63f1c833a09f930796d789fb1f5361.tar.bz2 linux-bd174fc2ca63f1c833a09f930796d789fb1f5361.zip | |
IB/mlx5: Fix function updating xlt emergency path
In memory shortage path we fall back to use spare buffer.
mlx5_ib_update_xlt() called from ib_uverbs_reg_mr when ibmr.ucontext
not initialized yet.
Scenario how to test it:
1. trigger memory exhaustion so __get_free_pages(GFP_KERNEL, 4) will fail
2. register MR
3. there should be no kernel oops
Fixes: 7d0cc6edcc70 ('IB/mlx5: Add MR cache for large UMR regions')
Signed-off-by: Artemy Kovalyov <artemyko@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
| -rw-r--r-- | drivers/infiniband/hw/mlx5/mr.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/infiniband/hw/mlx5/mr.c b/drivers/infiniband/hw/mlx5/mr.c index b8f9382a8b7d..1f09e11fa694 100644 --- a/drivers/infiniband/hw/mlx5/mr.c +++ b/drivers/infiniband/hw/mlx5/mr.c @@ -1009,7 +1009,7 @@ int mlx5_ib_update_xlt(struct mlx5_ib_mr *mr, u64 idx, int npages, } if (!xlt) { - uctx = to_mucontext(mr->ibmr.uobject->context); + uctx = to_mucontext(mr->ibmr.pd->uobject->context); mlx5_ib_warn(dev, "Using XLT emergency buffer\n"); size = PAGE_SIZE; xlt = (void *)uctx->upd_xlt_page; |