static void maple_dma_handler()

in maple/maple.c [630:711]

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

static void maple_dma_handler(struct work_struct *work)
{
	struct mapleq *mq, *nmq;
	struct maple_device *mdev;
	char *recvbuf;
	enum maple_code code;

	if (!maple_dma_done())
		return;
	__raw_writel(0, MAPLE_ENABLE);
	if (!list_empty(&maple_sentq)) {
		list_for_each_entry_safe(mq, nmq, &maple_sentq, list) {
			mdev = mq->dev;
			recvbuf = mq->recvbuf->buf;
			__flush_invalidate_region(sh_cacheop_vaddr(recvbuf),
					0x400);
			code = recvbuf[0];
			kfree(mq->sendbuf);
			list_del_init(&mq->list);
			switch (code) {
			case MAPLE_RESPONSE_NONE:
				maple_response_none(mdev);
				break;

			case MAPLE_RESPONSE_DEVINFO:
				maple_response_devinfo(mdev, recvbuf);
				atomic_set(&mdev->busy, 0);
				break;

			case MAPLE_RESPONSE_DATATRF:
				if (mdev->callback)
					mdev->callback(mq);
				atomic_set(&mdev->busy, 0);
				wake_up(&mdev->maple_wait);
				break;

			case MAPLE_RESPONSE_FILEERR:
				maple_response_fileerr(mdev, recvbuf);
				atomic_set(&mdev->busy, 0);
				wake_up(&mdev->maple_wait);
				break;

			case MAPLE_RESPONSE_AGAIN:
			case MAPLE_RESPONSE_BADCMD:
			case MAPLE_RESPONSE_BADFUNC:
				dev_warn(&mdev->dev, "non-fatal error"
					" 0x%X at (%d, %d)\n", code,
					mdev->port, mdev->unit);
				atomic_set(&mdev->busy, 0);
				break;

			case MAPLE_RESPONSE_ALLINFO:
				dev_notice(&mdev->dev, "extended"
				" device information request for (%d, %d)"
				" but call is not supported\n", mdev->port,
				mdev->unit);
				atomic_set(&mdev->busy, 0);
				break;

			case MAPLE_RESPONSE_OK:
				atomic_set(&mdev->busy, 0);
				wake_up(&mdev->maple_wait);
				break;

			default:
				break;
			}
		}
		/* if scanning is 1 then we have subdevices to check */
		if (scanning == 1) {
			maple_send();
			scanning = 2;
		} else
			scanning = 0;
		/*check if we have actually tested all ports yet */
		if (!fullscan)
			maple_port_rescan();
		/* mark that we have been through the first scan */
		started = 1;
	}
	maple_send();
}