drivers/comedi/comedi_usb.c

Source file repositories/reference/linux-study-clean/drivers/comedi/comedi_usb.c

File Facts

System
Linux kernel
Corpus path
drivers/comedi/comedi_usb.c
Extension
.c
Size
4646 bytes
Lines
140
Domain
Driver Families
Bucket
drivers/comedi
Inferred role
Driver Families: exported/initcall integration point
Status
integration implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

* This function is called from the module_init() of USB COMEDI driver modules
 * to register the COMEDI driver and the USB driver.  Do not call it directly,
 * use the module_comedi_usb_driver() helper macro instead.
 *
 * Return: %0 on success, or a negative error number on failure.
 */
int comedi_usb_driver_register(struct comedi_driver *comedi_driver,
			       struct usb_driver *usb_driver)
{
	int ret;

	ret = comedi_driver_register(comedi_driver);
	if (ret < 0)
		return ret;

	ret = usb_register(usb_driver);
	if (ret < 0) {
		comedi_driver_unregister(comedi_driver);
		return ret;
	}

	return 0;
}
EXPORT_SYMBOL_GPL(comedi_usb_driver_register);

/**
 * comedi_usb_driver_unregister() - Unregister a USB COMEDI driver
 * @comedi_driver: COMEDI driver to be registered.
 * @usb_driver: USB driver to be registered.
 *
 * This function is called from the module_exit() of USB COMEDI driver modules
 * to unregister the USB driver and the COMEDI driver.  Do not call it
 * directly, use the module_comedi_usb_driver() helper macro instead.
 */
void comedi_usb_driver_unregister(struct comedi_driver *comedi_driver,
				  struct usb_driver *usb_driver)
{
	usb_deregister(usb_driver);
	comedi_driver_unregister(comedi_driver);
}
EXPORT_SYMBOL_GPL(comedi_usb_driver_unregister);

MODULE_AUTHOR("https://www.comedi.org");
MODULE_DESCRIPTION("Comedi USB interface module");
MODULE_LICENSE("GPL");

Annotation

Implementation Notes