On Wed, May 17, 2023 at 11:59:55AM +0000, Badhri Jagan Sridharan wrote: > chipidea udc calls usb_udc_vbus_handler from udc_start gadget > ops causing a deadlock. Avoid this by offloading usb_udc_vbus_handler > processing. Surely that is the wrong approach. The real problem here is that usb_udc_vbus_handler() gets called from within a udc_start routine. But this is totally unnecessary, because the UDC core will call usb_udc_connect_control_locked() itself, later on during gadget_bind_driver(). So a proper solution would be simply to remove the unnecessary usb_udc_vbus_handler() call from the chipidea driver (and similarly for the max3420_udc driver). Similar changes may be needed in these drivers' udc_stop routines. Alan Stern
