1USB_DRIVER_SET_CONFI(9)          USB Core APIs         USB_DRIVER_SET_CONFI(9)
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NAME

6       usb_driver_set_configuration - Provide a way for drivers to change
7       device configurations
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SYNOPSIS

10       int usb_driver_set_configuration(struct usb_device * udev, int config);
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ARGUMENTS

13       udev
14           the device whose configuration is being updated
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16       config
17           the configuration being chosen.
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CONTEXT

20       In process context, must be able to sleep
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DESCRIPTION

23       Device interface drivers are not allowed to change device
24       configurations. This is because changing configurations will destroy
25       the interface the driver is bound to and create new ones; it would be
26       like a floppy-disk driver telling the computer to replace the
27       floppy-disk drive with a tape drive!
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29       Still, in certain specialized circumstances the need may arise. This
30       routine gets around the normal restrictions by using a work thread to
31       submit the change-config request.
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RETURN

34       0 if the request was successfully queued, error code otherwise. The
35       caller has no way to know whether the queued request will eventually
36       succeed.
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39Kernel Hackers Manual 3.10         June 2019           USB_DRIVER_SET_CONFI(9)
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