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authorJason Gunthorpe <jgg@mellanox.com>2019-08-19 14:17:06 +0300
committerJason Gunthorpe <jgg@mellanox.com>2019-08-21 14:08:43 -0300
commit204e3e5630c5d41948fc11d8419c07da8f3e5a4d (patch)
treebeff53d4d2ef58f612caaebddec78eda7819a554 /include/rdma
parent0446cad9ca385c3b8d6e5a1184e59650fa7a7a6d (diff)
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.h5
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)