Routers might not have a UID set if the DROM read failed during
initialization previously.
Normally upon resume the UID is re-read to confirm it's the same
device connected.
* If the DROM read failed during init but then succeeded during
resume it could either be a new device or faulty device
* If the DROM read failed during init and also failed during resume
it might be a different device plugged in all together.
Detect this situation and prevent re-using the same configuration in
these cirucmstances.
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
return err;
}
+ /* We don't have any way to confirm this was the same device */
+ if (!sw->uid)
+ return -ENODEV;
+
if (tb_switch_is_usb4(sw))
err = usb4_switch_read_uid(sw, &uid);
else