centos man page for usb_reset_device

USB_RESET_DEVICE(9)						   USB Core APIs					       USB_RESET_DEVICE(9)

NAME
       usb_reset_device - warn interface drivers and perform a USB port reset

SYNOPSIS
       int usb_reset_device(struct usb_device * udev);

ARGUMENTS
       udev
	   device to reset (not in SUSPENDED or NOTATTACHED state)

DESCRIPTION
       Warns all drivers bound to registered interfaces (using their pre_reset method), performs the port reset, and then lets the drivers know
       that the reset is over (using their post_reset method).

RETURN
       The same as for usb_reset_and_verify_device.

NOTE
       The caller must own the device lock. For example, it's safe to use this from a driver probe routine after downloading new firmware. For
       calls that might not occur during probe, drivers should lock the device using usb_lock_device_for_reset.

       If an interface is currently being probed or disconnected, we assume its driver knows how to handle resets. For all other interfaces, if
       the driver doesn't have pre_reset and post_reset methods then we attempt to unbind it and rebind afterward.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						       USB_RESET_DEVICE(9)