Drivers should not crash the kernel. This function is only called by comedi_device_detach_cleanup() and the s->minor will always be valid or the device wouldn't have attached in the first place. Leave the checks for safety in accessing the comedi_subdevice_minor_table array but remove the BUG_ON() calls. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>