diff options
Diffstat (limited to 'drivers/thunderbolt/switch.c')
| -rw-r--r-- | drivers/thunderbolt/switch.c | 48 |
1 files changed, 32 insertions, 16 deletions
diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c index 7303c61a891a..dae59919e2bf 100644 --- a/drivers/thunderbolt/switch.c +++ b/drivers/thunderbolt/switch.c @@ -1153,6 +1153,33 @@ static int tb_port_start_lane_initialization(struct tb_port *port) return ret == -EINVAL ? 0 : ret; } +/* + * Returns true if the port had something (router, XDomain) connected + * before suspend. + */ +static bool tb_port_resume(struct tb_port *port) +{ + bool has_remote = tb_port_has_remote(port); + + if (port->usb4) { + usb4_port_device_resume(port->usb4); + } else if (!has_remote) { + /* + * For disconnected downstream lane adapters start lane + * initialization now so we detect future connects. + * + * For XDomain start the lane initialzation now so the + * link gets re-established. + * + * This is only needed for non-USB4 ports. + */ + if (!tb_is_upstream_port(port) || port->xdomain) + tb_port_start_lane_initialization(port); + } + + return has_remote || port->xdomain; +} + /** * tb_port_is_enabled() - Is the adapter port enabled * @port: Port to check @@ -2915,22 +2942,11 @@ int tb_switch_resume(struct tb_switch *sw) /* check for surviving downstream switches */ tb_switch_for_each_port(sw, port) { - if (!tb_port_has_remote(port) && !port->xdomain) { - /* - * For disconnected downstream lane adapters - * start lane initialization now so we detect - * future connects. - */ - if (!tb_is_upstream_port(port) && tb_port_is_null(port)) - tb_port_start_lane_initialization(port); + if (!tb_port_is_null(port)) + continue; + + if (!tb_port_resume(port)) continue; - } else if (port->xdomain) { - /* - * Start lane initialization for XDomain so the - * link gets re-established. - */ - tb_port_start_lane_initialization(port); - } if (tb_wait_for_port(port, true) <= 0) { tb_port_warn(port, @@ -2939,7 +2955,7 @@ int tb_switch_resume(struct tb_switch *sw) tb_sw_set_unplugged(port->remote->sw); else if (port->xdomain) port->xdomain->is_unplugged = true; - } else if (tb_port_has_remote(port) || port->xdomain) { + } else { /* * Always unlock the port so the downstream * switch/domain is accessible. |