usb_driver_set_configuration man page on Scientific

usb_driver_set_configuration man page on Scientific

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USB_DRIVER_SET_CONFI(9)		 USB Core APIs	       USB_DRIVER_SET_CONFI(9)

NAME
       usb_driver_set_configuration - Provide a way for drivers to change
       device configurations

SYNOPSIS
       int usb_driver_set_configuration(struct usb_device * udev, int config);

ARGUMENTS
       udev
	   the device whose configuration is being updated

       config
	   the configuration being chosen.

CONTEXT
       In process context, must be able to sleep

DESCRIPTION
       Device interface drivers are not allowed to change device
       configurations. This is because changing configurations will destroy
       the interface the driver is bound to and create new ones; it would be
       like a floppy-disk driver telling the computer to replace the
       floppy-disk drive with a tape drive!

       Still, in certain specialized circumstances the need may arise. This
       routine gets around the normal restrictions by using a work thread to
       submit the change-config request.

       Returns 0 if the request was succesfully queued, error code otherwise.
       The caller has no way to know whether the queued request will
       eventually succeed.

COPYRIGHT
Kernel Hackers Manual 2.6.	 November 2013	       USB_DRIVER_SET_CONFI(9)

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