On Fri, Mar 17, 2023 at 02:16:23AM +0800, Zheng Wang wrote: > In renesas_usb3_probe, role_work is bound with renesas_usb3_role_work. > renesas_usb3_start will be called to start the work. > > If we remove the driver which will call usbhs_remove, there may be > an unfinished work. The possible sequence is as follows: > > Fix it by canceling the work before cleanup in the renesas_usb3_remove. > > Note that removing a driver is a root-only operation, and should never > happen. > > CPU0 CPU1 > > renesas_usb3_role_work > renesas_usb3_remove > usb_role_switch_unregister > device_unregister > kfree(sw) > free usb3->role_sw > usb_role_switch_set_role > //use usb3->role_sw No line at all?
