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 successfully queued, error code otherwise. The caller has no way to know whether the queued request will
eventually succeed.
COPYRIGHT Kernel Hackers Manual 2.6. July 2010 USB_DRIVER_SET_CONFI(9)
Check Out this Related Man Page
STRUCT USB_DEVICE_DR(9) Host-Side Data Types and Macro STRUCT USB_DEVICE_DR(9)NAME
struct_usb_device_driver - identifies USB device driver to usbcore
SYNOPSIS
struct usb_device_driver {
const char * name;
int (* probe) (struct usb_device *udev);
void (* disconnect) (struct usb_device *udev);
int (* suspend) (struct usb_device *udev, pm_message_t message);
int (* resume) (struct usb_device *udev, pm_message_t message);
struct usbdrv_wrap drvwrap;
unsigned int supports_autosuspend:1;
};
MEMBERS
name
The driver name should be unique among USB drivers, and should normally be the same as the module name.
probe
Called to see if the driver is willing to manage a particular device. If it is, probe returns zero and uses dev_set_drvdata to
associate driver-specific data with the device. If unwilling to manage the device, return a negative errno value.
disconnect
Called when the device is no longer accessible, usually because it has been (or is being) disconnected or the driver's module is being
unloaded.
suspend
Called when the device is going to be suspended by the system.
resume
Called when the device is being resumed by the system.
drvwrap
Driver-model core structure wrapper.
supports_autosuspend
if set to 0, the USB core will not allow autosuspend for devices bound to this driver.
DESCRIPTION
USB drivers must provide all the fields listed above except drvwrap.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 STRUCT USB_DEVICE_DR(9)
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