virtio: console: show error message if hvc_alloc fails for console ports

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

drivers/char/virtio_console.c

@@ -753,6 +753,8 @@ int init_port_console(struct port *port)
 	port->cons.hvc = hvc_alloc(port->cons.vtermno, 0, &hv_ops, PAGE_SIZE);
 	if (IS_ERR(port->cons.hvc)) {
 		ret = PTR_ERR(port->cons.hvc);
+		dev_err(port->dev,
+			"error %d allocating hvc for port\n", ret);
 		port->cons.hvc = NULL;
 		return ret;
 	}