net/mlx5: FPGA, Abort FPGA init if the device reports no QP capability

In the case that the reported max number of QPs capability
equals to zero, abort FPGA init.

Signed-off-by: Yevgeny Kliteynik <kliteyn@mellanox.com>
Signed-off-by: Adi Nissim <adin@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

drivers/net/ethernet/mellanox/mlx5/core/fpga/core.c

@@ -170,6 +170,12 @@ int mlx5_fpga_device_start(struct mlx5_core_dev *mdev)
 		       MLX5_CAP_FPGA(fdev->mdev, sandbox_product_version));
 
 	max_num_qps = MLX5_CAP_FPGA(mdev, shell_caps.max_num_qps);
+	if (!max_num_qps) {
+		mlx5_fpga_err(fdev, "FPGA reports 0 QPs in SHELL_CAPS\n");
+		err = -ENOTSUPP;
+		goto out;
+	}
+
 	err = mlx5_core_reserve_gids(mdev, max_num_qps);
 	if (err)
 		goto out;