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Message-Id: <20200213151959.153418142@linuxfoundation.org>
Date: Thu, 13 Feb 2020 07:20:08 -0800
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Yishai Hadas <yishaih@...lanox.com>,
Artemy Kovalyov <artemyko@...lanox.com>,
Jason Gunthorpe <jgg@...lanox.com>,
Leon Romanovsky <leonro@...lanox.com>
Subject: [PATCH 4.14 105/173] IB/core: Fix ODP get user pages flow
From: Yishai Hadas <yishaih@...lanox.com>
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: 403cd12e2cf7 ("IB/umem: Add contiguous ODP support")
Link: https://lore.kernel.org/r/20191222124649.52300-3-leon@kernel.org
Signed-off-by: Yishai Hadas <yishaih@...lanox.com>
Reviewed-by: Artemy Kovalyov <artemyko@...lanox.com>
Reviewed-by: Jason Gunthorpe <jgg@...lanox.com>
Signed-off-by: Leon Romanovsky <leonro@...lanox.com>
Signed-off-by: Jason Gunthorpe <jgg@...lanox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
drivers/infiniband/core/umem_odp.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/infiniband/core/umem_odp.c
+++ b/drivers/infiniband/core/umem_odp.c
@@ -637,7 +637,7 @@ int ib_umem_odp_map_dma_pages(struct ib_
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);
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