u16 wLength
);
+
+static int persist_enabled_on_companion(struct usb_device *udev, void *unused)
+{
+ return !udev->maxchild && udev->persist_enabled &&
+ udev->bus->root_hub->speed < USB_SPEED_HIGH;
+}
+
/* After a power loss, ports that were owned by the companion must be
* reset so that the companion can still own them.
*/
if (!ehci->owned_ports)
return;
+ /*
+ * USB 1.1 devices are mostly HIDs, which don't need to persist across
+ * suspends. If we ensure that none of our companion's devices have
+ * persist_enabled (by looking through all USB 1.1 buses in the system),
+ * we can skip this and avoid slowing resume down. Devices without
+ * persist will just get reenumerated shortly after resume anyway.
+ */
+ if (!usb_for_each_dev(NULL, persist_enabled_on_companion))
+ return;
+
/* Give the connections some time to appear */
msleep(20);