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| author | Jason Gunthorpe <jgg@mellanox.com> | 2019-08-19 14:17:06 +0300 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@mellanox.com> | 2019-08-21 20:08:43 +0300 |
| commit | 204e3e5630c5d41948fc11d8419c07da8f3e5a4d (patch) | |
| tree | beff53d4d2ef58f612caaebddec78eda7819a554 /include/rdma | |
| parent | 0446cad9ca385c3b8d6e5a1184e59650fa7a7a6d (diff) | |
| download | linux-204e3e5630c5d41948fc11d8419c07da8f3e5a4d.tar.xz | |
RDMA/odp: Check for overflow when computing the umem_odp end
Since the page size can be extended in the ODP case by IB_ACCESS_HUGETLB
the existing overflow checks done by ib_umem_get() are not
sufficient. Check for overflow again.
Further, remove the unchecked math from the inlines and just use the
precomputed value stored in the interval_tree_node.
Link: https://lore.kernel.org/r/20190819111710.18440-9-leon@kernel.org
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'include/rdma')
| -rw-r--r-- | include/rdma/ib_umem_odp.h | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/include/rdma/ib_umem_odp.h b/include/rdma/ib_umem_odp.h index 5efb67f97b0a..b37c674b7fe6 100644 --- a/include/rdma/ib_umem_odp.h +++ b/include/rdma/ib_umem_odp.h @@ -91,14 +91,13 @@ static inline struct ib_umem_odp *to_ib_umem_odp(struct ib_umem *umem) /* Returns the first page of an ODP umem. */ static inline unsigned long ib_umem_start(struct ib_umem_odp *umem_odp) { - return ALIGN_DOWN(umem_odp->umem.address, 1UL << umem_odp->page_shift); + return umem_odp->interval_tree.start; } /* Returns the address of the page after the last one of an ODP umem. */ static inline unsigned long ib_umem_end(struct ib_umem_odp *umem_odp) { - return ALIGN(umem_odp->umem.address + umem_odp->umem.length, - 1UL << umem_odp->page_shift); + return umem_odp->interval_tree.last + 1; } static inline size_t ib_umem_odp_num_pages(struct ib_umem_odp *umem_odp) |