On Sat, Dec 28, 2019 at 02:33:01PM -0500, Alan Stern wrote:

Let's try a slightly different approach. What happens with this patch?

Alan Stern

Index: usb-devel/drivers/usb/core/hub.c

--- usb-devel.orig/drivers/usb/core/hub.c +++ usb-devel/drivers/usb/core/hub.c @@ -1065,6 +1065,7 @@ static void hub_activate(struct usb_hub if (type == HUB_INIT) { delay = hub_power_on_good_delay(hub);

• 	hub->power_bits[0] = ~0UL;	/* All ports on */
  hub_power_on(hub, false);
  INIT_DELAYED_WORK(&hub->init_work, hub_init_func2);
  queue_delayed_work(system_power_efficient_wq,
  
  

That doesn't make a difference - the traceback is still seen with this patch applied.

Guenter