IB/mlx5: Fix check of number of entries in create CQ

Verify that the value is non negative before rounding up to power of 2.

Signed-off-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

diff --git a/drivers/infiniband/hw/mlx5/cq.c b/drivers/infiniband/hw/mlx5/cq.c
index 344ab03..e7c64c5 100644 (file)
--- a/drivers/infiniband/hw/mlx5/cq.c
+++ b/drivers/infiniband/hw/mlx5/cq.c
@@ -653,8 +653,11 @@ struct ib_cq *mlx5_ib_create_cq(struct ib_device *ibdev, int entries,
        int eqn;
        int err;
 
+       if (entries < 0)
+               return ERR_PTR(-EINVAL);
+
        entries = roundup_pow_of_two(entries + 1);
-       if (entries < 1 || entries > dev->mdev.caps.max_cqes)
+       if (entries > dev->mdev.caps.max_cqes)
                return ERR_PTR(-EINVAL);
 
        cq = kzalloc(sizeof(*cq), GFP_KERNEL);