On Fri, Oct 20, 2023 at 08:31:38AM -0700, Douglas Anderson wrote: > When we call usb_reset_device() and a driver doesn't implement > pre_reset() and post_reset() methods then the USB core will attempt to > unbind and rebind the driver in order to make reset work. This is a > great general solution, but it has the potential to loop forever. > Specifically, if the USB device is in a state that the USB device > driver issues another usb_reset_device() after each rebind then we'll > just continually unbind and rebind with no end. > > It's difficult to address this condition in a USB device driver > because it's hard for the driver to keep state across each > unbind/bind. How about just adding appropriate pre_reset() and post_reset() methods? This is precisely what they are meant for. Then the the unbind/rebind loop wouldn't ever get started. Alan Stern
