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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 <mika.westerberg@linux.intel.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mika Westerberg 2021-03-02 16:11:07 +02:00
parent 2f608ba196
commit 6f3badead6
1 changed files with 14 additions and 1 deletions
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15
drivers/thunderbolt/switch.c
View File

@ -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)