Re: [PATCH] usb: chipidea: host: Disable port power only if previously enabled

[Guenter Roeck]

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