diff options
Diffstat (limited to 'drivers/thunderbolt/switch.c')
| -rw-r--r-- | drivers/thunderbolt/switch.c | 42 |
1 files changed, 41 insertions, 1 deletions
diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c index b31b8cef301d..d6c32e1e2b42 100644 --- a/drivers/thunderbolt/switch.c +++ b/drivers/thunderbolt/switch.c @@ -195,6 +195,24 @@ static void tb_dump_switch(struct tb *tb, struct tb_regs_switch_header *sw) sw->__unknown1, sw->__unknown4); } +struct tb_switch *get_switch_at_route(struct tb_switch *sw, u64 route) +{ + u8 next_port = route; /* + * Routes use a stride of 8 bits, + * eventhough a port index has 6 bits at most. + * */ + if (route == 0) + return sw; + if (next_port > sw->config.max_port_number) + return 0; + if (tb_is_upstream_port(&sw->ports[next_port])) + return 0; + if (!sw->ports[next_port].remote) + return 0; + return get_switch_at_route(sw->ports[next_port].remote->sw, + route >> TB_ROUTE_SHIFT); +} + /** * tb_plug_events_active() - enable/disable plug events on a switch * @@ -249,7 +267,8 @@ void tb_switch_free(struct tb_switch *sw) sw->ports[i].remote = NULL; } - tb_plug_events_active(sw, false); + if (!sw->is_unplugged) + tb_plug_events_active(sw, false); kfree(sw->ports); kfree(sw); @@ -333,3 +352,24 @@ err: return NULL; } +/** + * tb_sw_set_unpplugged() - set is_unplugged on switch and downstream switches + */ +void tb_sw_set_unpplugged(struct tb_switch *sw) +{ + int i; + if (sw == sw->tb->root_switch) { + tb_sw_WARN(sw, "cannot unplug root switch\n"); + return; + } + if (sw->is_unplugged) { + tb_sw_WARN(sw, "is_unplugged already set\n"); + return; + } + sw->is_unplugged = true; + for (i = 0; i <= sw->config.max_port_number; i++) { + if (!tb_is_upstream_port(&sw->ports[i]) && sw->ports[i].remote) + tb_sw_set_unpplugged(sw->ports[i].remote->sw); + } +} + |