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IB/core: Fix ODP get user pages flow

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commit d07de8bd1709a80a282963ad7b2535148678a9e4 upstream.

The nr_pages argument of get_user_pages_remote() should always be in terms
of the system page size, not the MR page size. Use PAGE_SIZE instead of
umem_odp->page_shift.

Fixes: 403cd12e2c ("IB/umem: Add contiguous ODP support")
Link: https://lore.kernel.org/r/20191222124649.52300-3-leon@kernel.org
Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Reviewed-by: Artemy Kovalyov <artemyko@mellanox.com>
Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Yishai Hadas 2019-12-22 14:46:48 +02:00 • committed by Greg Kroah-Hartman
commit 0d1dacfda0
1 changed files with 1 additions and 1 deletions
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2
drivers/infiniband/core/umem_odp.c
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@ -632,7 +632,7 @@ int ib_umem_odp_map_dma_pages(struct ib_umem_odp *umem_odp, u64 user_virt,
while (bcnt > 0) {
const size_t gup_num_pages = min_t(size_t,
(bcnt + BIT(page_shift) - 1) >> page_shift,
ALIGN(bcnt, PAGE_SIZE) / PAGE_SIZE,
PAGE_SIZE / sizeof(struct page *));
down_read(&owning_mm->mmap_sem);