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thunderbolt: Add 'boot' attribute for devices

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In various cases, Thunderbolt device can be connected by ICM on boot
without waiting for approval from user. Most cases are related to
OEM-specific BIOS configurations. This information is interesting for
user-space as if the device isn't in SW ACL, it may create a friction in
the user experience where the device is automatically authorized if it's
connected on boot but requires an explicit user action if connected
after OS is up. User-space can use this information to suggest adding
the device to SW ACL for auto-authorization on later connections.

Signed-off-by: Yehezkel Bernat <yehezkel.bernat@intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
This commit is contained in:
Yehezkel Bernat
2018-01-22 12:50:09 +02:00
committed by Mika Westerberg
parent 3080e197e9
commit 14862ee308
5 changed files with 32 additions and 4 deletions
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14
drivers/thunderbolt/switch.c
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@@ -775,6 +775,15 @@ static ssize_t authorized_store(struct device *dev,
}
static DEVICE_ATTR_RW(authorized);
static ssize_t boot_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct tb_switch *sw = tb_to_switch(dev);
return sprintf(buf, "%u\n", sw->boot);
}
static DEVICE_ATTR_RO(boot);
static ssize_t device_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
@@ -951,6 +960,7 @@ static DEVICE_ATTR_RO(unique_id);
static struct attribute *switch_attrs[] = {
&dev_attr_authorized.attr,
&dev_attr_boot.attr,
&dev_attr_device.attr,
&dev_attr_device_name.attr,
&dev_attr_key.attr,
@@ -979,6 +989,10 @@ static umode_t switch_attr_is_visible(struct kobject *kobj,
if (sw->dma_port)
return attr->mode;
return 0;
} else if (attr == &dev_attr_boot.attr) {
if (tb_route(sw))
return attr->mode;
return 0;
}
return sw->safe_mode ? 0 : attr->mode;