On Sun, Dec 29, 2019 at 11:40:52AM -0500, Alan Stern wrote:
On Sun, 29 Dec 2019, Guenter Roeck wrote:
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.
Can you trace what's going on? Does this code pathway now end up calling ehci_port_power() for each root-hub port, and from there down into the chipidea driver? If not, can you find where it gets sidetracked?
Sure, I'll do that. It will have to wait for the new year, though - internet connectivity is terrible where I am right now,
Guenter