static void memstick_check()

in core/memstick.c [427:482]

• 49 lines of code
• 15 McCabe index (conditional complexity)

static void memstick_check(struct work_struct *work)
{
	struct memstick_host *host = container_of(work, struct memstick_host,
						  media_checker);
	struct memstick_dev *card;

	dev_dbg(&host->dev, "memstick_check started\n");
	pm_runtime_get_noresume(host->dev.parent);
	mutex_lock(&host->lock);
	if (!host->card) {
		if (memstick_power_on(host))
			goto out_power_off;
	} else if (host->card->stop)
		host->card->stop(host->card);

	if (host->removing)
		goto out_power_off;

	card = memstick_alloc_card(host);

	if (!card) {
		if (host->card) {
			device_unregister(&host->card->dev);
			host->card = NULL;
		}
	} else {
		dev_dbg(&host->dev, "new card %02x, %02x, %02x\n",
			card->id.type, card->id.category, card->id.class);
		if (host->card) {
			if (memstick_set_rw_addr(host->card)
			    || !memstick_dev_match(host->card, &card->id)
			    || !(host->card->check(host->card))) {
				device_unregister(&host->card->dev);
				host->card = NULL;
			} else if (host->card->start)
				host->card->start(host->card);
		}

		if (!host->card) {
			host->card = card;
			if (device_register(&card->dev)) {
				put_device(&card->dev);
				host->card = NULL;
			}
		} else
			kfree(card);
	}

out_power_off:
	if (!host->card)
		host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_OFF);

	mutex_unlock(&host->lock);
	pm_runtime_put(host->dev.parent);
	dev_dbg(&host->dev, "memstick_check finished\n");
}