diff options
| author | Jason Gunthorpe | 2020-09-04 19:41:48 -0300 |
|---|---|---|
| committer | Jason Gunthorpe | 2020-09-11 10:24:53 -0300 |
| commit | 1f9b6827c85f9d9786f31a1434a16c917aae23b2 (patch) | |
| tree | 2c565f0d1e09a4fd114f0fa34367a35be38285f2 /drivers/infiniband | |
| parent | a665aca89a411115e35ea937c2d3fb2ee4f5a701 (diff) | |
RDMA/efa: Use ib_umem_num_dma_pages()
If ib_umem_find_best_pgsz() returns > PAGE_SIZE then the equation here is
not correct. 'start' should be 'virt'. Change it to use the core code for
page_num and the canonical calculation of page_shift.
Fixes: 40ddb3f02083 ("RDMA/efa: Use API to get contiguous memory blocks aligned to device supported page size")
Link: https://lore.kernel.org/r/7-v2-270386b7e60b+28f4-umem_1_jgg@nvidia.com
Tested-by: Gal Pressman <galpress@amazon.com>
Acked-by: Gal Pressman <galpress@amazon.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'drivers/infiniband')
| -rw-r--r-- | drivers/infiniband/hw/efa/efa_verbs.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/infiniband/hw/efa/efa_verbs.c b/drivers/infiniband/hw/efa/efa_verbs.c index 81db565c098a..52b7ea9fd4ee 100644 --- a/drivers/infiniband/hw/efa/efa_verbs.c +++ b/drivers/infiniband/hw/efa/efa_verbs.c @@ -4,6 +4,7 @@ */ #include <linux/vmalloc.h> +#include <linux/log2.h> #include <rdma/ib_addr.h> #include <rdma/ib_umem.h> @@ -1540,9 +1541,8 @@ struct ib_mr *efa_reg_mr(struct ib_pd *ibpd, u64 start, u64 length, goto err_unmap; } - params.page_shift = __ffs(pg_sz); - params.page_num = DIV_ROUND_UP(length + (start & (pg_sz - 1)), - pg_sz); + params.page_shift = order_base_2(pg_sz); + params.page_num = ib_umem_num_dma_blocks(mr->umem, pg_sz); ibdev_dbg(&dev->ibdev, "start %#llx length %#llx params.page_shift %u params.page_num %u\n", |