diff options
| author | Ilya Lesokhin <ilyal@mellanox.com> | 2017-08-17 15:52:32 +0300 |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2017-08-24 17:47:34 -0400 |
| commit | 7b4cdaae73ee833975a767cf54a3354d355b3f8d (patch) | |
| tree | a5b8fb1a7012e3b79d4bce69d543d381b228dc74 | |
| parent | 5942d8ae411775b76e5e1ab0cce57b0666516f2d (diff) | |
IB/mlx5: Fix integer overflow when page_shift == 31
Fix a bug where MR registration fails when mlx5_ib_cont_pages
indicates that the MR can be mapped using 2GB pages (page_shift == 31).
Fixes: e126ba97dba9 ("mlx5: Add driver for Mellanox Connect-IB adapters")
Signed-off-by: Ilya Lesokhin <ilyal@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
| -rw-r--r-- | drivers/infiniband/hw/mlx5/mr.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/infiniband/hw/mlx5/mr.c b/drivers/infiniband/hw/mlx5/mr.c index 8cf53eb13148..0e2789d9bb4d 100644 --- a/drivers/infiniband/hw/mlx5/mr.c +++ b/drivers/infiniband/hw/mlx5/mr.c @@ -808,13 +808,14 @@ err_free: return ERR_PTR(err); } -static int get_octo_len(u64 addr, u64 len, int page_size) +static int get_octo_len(u64 addr, u64 len, int page_shift) { + u64 page_size = 1ULL << page_shift; u64 offset; int npages; offset = addr & (page_size - 1); - npages = ALIGN(len + offset, page_size) >> ilog2(page_size); + npages = ALIGN(len + offset, page_size) >> page_shift; return (npages + 1) / 2; } @@ -1147,12 +1148,12 @@ static struct mlx5_ib_mr *reg_create(struct ib_mr *ibmr, struct ib_pd *pd, MLX5_SET(mkc, mkc, pd, to_mpd(pd)->pdn); MLX5_SET(mkc, mkc, bsf_octword_size, 0); MLX5_SET(mkc, mkc, translations_octword_size, - get_octo_len(virt_addr, length, 1 << page_shift)); + get_octo_len(virt_addr, length, page_shift)); MLX5_SET(mkc, mkc, log_page_size, page_shift); MLX5_SET(mkc, mkc, qpn, 0xffffff); if (populate) { MLX5_SET(create_mkey_in, in, translations_octword_actual_size, - get_octo_len(virt_addr, length, 1 << page_shift)); + get_octo_len(virt_addr, length, page_shift)); } err = mlx5_core_create_mkey(dev->mdev, &mr->mmkey, in, inlen); |