IB/mlx5: Validate requested RQT size

commit efd7f40082a0dfd112eb87ff2124467a5739216f upstream.

Validate that the requested size of RQT is supported by firmware.

Fixes: c5f9092936fe ('IB/mlx5: Add Receive Work Queue Indirection table operations')
Signed-off-by: Maor Gottlieb <maorg@mellanox.com>
Reviewed-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/infiniband/hw/mlx5/qp.c b/drivers/infiniband/hw/mlx5/qp.c
index affc3f6598cac6c0d6e794dbca0594aace42500b..304e39fd3c91dfe67d67f3bfc1d708395e45f5a8 100644 (file)
--- a/drivers/infiniband/hw/mlx5/qp.c
+++ b/drivers/infiniband/hw/mlx5/qp.c
@@ -4702,6 +4702,14 @@ struct ib_rwq_ind_table *mlx5_ib_create_rwq_ind_table(struct ib_device *device,
                                 udata->inlen))
                return ERR_PTR(-EOPNOTSUPP);
 
+       if (init_attr->log_ind_tbl_size >
+           MLX5_CAP_GEN(dev->mdev, log_max_rqt_size)) {
+               mlx5_ib_dbg(dev, "log_ind_tbl_size = %d is bigger than supported = %d\n",
+                           init_attr->log_ind_tbl_size,
+                           MLX5_CAP_GEN(dev->mdev, log_max_rqt_size));
+               return ERR_PTR(-EINVAL);
+       }
+
        min_resp_len = offsetof(typeof(resp), reserved) + sizeof(resp.reserved);
        if (udata->outlen && udata->outlen < min_resp_len)
                return ERR_PTR(-EINVAL);