int __init sh_early_platform_driver_register()

in drivers/platform_early.c [67:114]

• 33 lines of code
• 10 McCabe index (conditional complexity)

int __init sh_early_platform_driver_register(struct sh_early_platform_driver *epdrv,
					  char *buf)
{
	char *tmp;
	int n;

	/* Simply add the driver to the end of the global list.
	 * Drivers will by default be put on the list in compiled-in order.
	 */
	if (!epdrv->list.next) {
		INIT_LIST_HEAD(&epdrv->list);
		list_add_tail(&epdrv->list, &sh_early_platform_driver_list);
	}

	/* If the user has specified device then make sure the driver
	 * gets prioritized. The driver of the last device specified on
	 * command line will be put first on the list.
	 */
	n = strlen(epdrv->pdrv->driver.name);
	if (buf && !strncmp(buf, epdrv->pdrv->driver.name, n)) {
		list_move(&epdrv->list, &sh_early_platform_driver_list);

		/* Allow passing parameters after device name */
		if (buf[n] == '\0' || buf[n] == ',')
			epdrv->requested_id = -1;
		else {
			epdrv->requested_id = simple_strtoul(&buf[n + 1],
							     &tmp, 10);

			if (buf[n] != '.' || (tmp == &buf[n + 1])) {
				epdrv->requested_id = EARLY_PLATFORM_ID_ERROR;
				n = 0;
			} else
				n += strcspn(&buf[n + 1], ",") + 1;
		}

		if (buf[n] == ',')
			n++;

		if (epdrv->bufsize) {
			memcpy(epdrv->buffer, &buf[n],
			       min_t(int, epdrv->bufsize, strlen(&buf[n]) + 1));
			epdrv->buffer[epdrv->bufsize - 1] = '\0';
		}
	}

	return 0;
}