From 6f3badead6a078cf3c71f381f9d84ac922984a00 Mon Sep 17 00:00:00 2001 From: Mika Westerberg Date: Tue, 2 Mar 2021 16:11:07 +0200 Subject: [PATCH] thunderbolt: Hide authorized attribute if router does not support PCIe tunnels With USB4 devices PCIe tunneling is optional so for device routers without PCIe upstream adapter it does not make much sense to expose the authorized attribute. For this reason hide it if PCIe tunneling is not supported by the device router. Signed-off-by: Mika Westerberg Reviewed-by: Greg Kroah-Hartman --- drivers/thunderbolt/switch.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c index a1b4a695080e..fbcc920e327c 100644 --- a/drivers/thunderbolt/switch.c +++ b/drivers/thunderbolt/switch.c @@ -1746,6 +1746,18 @@ static struct attribute *switch_attrs[] = { NULL, }; +static bool has_port(const struct tb_switch *sw, enum tb_port_type type) +{ + const struct tb_port *port; + + tb_switch_for_each_port(sw, port) { + if (!port->disabled && port->config.type == type) + return true; + } + + return false; +} + static umode_t switch_attr_is_visible(struct kobject *kobj, struct attribute *attr, int n) { @@ -1754,7 +1766,8 @@ static umode_t switch_attr_is_visible(struct kobject *kobj, if (attr == &dev_attr_authorized.attr) { if (sw->tb->security_level == TB_SECURITY_NOPCIE || - sw->tb->security_level == TB_SECURITY_DPONLY) + sw->tb->security_level == TB_SECURITY_DPONLY || + !has_port(sw, TB_TYPE_PCIE_UP)) return 0; } else if (attr == &dev_attr_device.attr) { if (!sw->device)