void mhi_create_devices()

in mhi/core/main.c [359:426]

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

void mhi_create_devices(struct mhi_controller *mhi_cntrl)
{
	struct mhi_chan *mhi_chan;
	struct mhi_device *mhi_dev;
	struct device *dev = &mhi_cntrl->mhi_dev->dev;
	int i, ret;

	mhi_chan = mhi_cntrl->mhi_chan;
	for (i = 0; i < mhi_cntrl->max_chan; i++, mhi_chan++) {
		if (!mhi_chan->configured || mhi_chan->mhi_dev ||
		    !(mhi_chan->ee_mask & BIT(mhi_cntrl->ee)))
			continue;
		mhi_dev = mhi_alloc_device(mhi_cntrl);
		if (IS_ERR(mhi_dev))
			return;

		mhi_dev->dev_type = MHI_DEVICE_XFER;
		switch (mhi_chan->dir) {
		case DMA_TO_DEVICE:
			mhi_dev->ul_chan = mhi_chan;
			mhi_dev->ul_chan_id = mhi_chan->chan;
			break;
		case DMA_FROM_DEVICE:
			/* We use dl_chan as offload channels */
			mhi_dev->dl_chan = mhi_chan;
			mhi_dev->dl_chan_id = mhi_chan->chan;
			break;
		default:
			dev_err(dev, "Direction not supported\n");
			put_device(&mhi_dev->dev);
			return;
		}

		get_device(&mhi_dev->dev);
		mhi_chan->mhi_dev = mhi_dev;

		/* Check next channel if it matches */
		if ((i + 1) < mhi_cntrl->max_chan && mhi_chan[1].configured) {
			if (!strcmp(mhi_chan[1].name, mhi_chan->name)) {
				i++;
				mhi_chan++;
				if (mhi_chan->dir == DMA_TO_DEVICE) {
					mhi_dev->ul_chan = mhi_chan;
					mhi_dev->ul_chan_id = mhi_chan->chan;
				} else {
					mhi_dev->dl_chan = mhi_chan;
					mhi_dev->dl_chan_id = mhi_chan->chan;
				}
				get_device(&mhi_dev->dev);
				mhi_chan->mhi_dev = mhi_dev;
			}
		}

		/* Channel name is same for both UL and DL */
		mhi_dev->name = mhi_chan->name;
		dev_set_name(&mhi_dev->dev, "%s_%s",
			     dev_name(&mhi_cntrl->mhi_dev->dev),
			     mhi_dev->name);

		/* Init wakeup source if available */
		if (mhi_dev->dl_chan && mhi_dev->dl_chan->wake_capable)
			device_init_wakeup(&mhi_dev->dev, true);

		ret = device_add(&mhi_dev->dev);
		if (ret)
			put_device(&mhi_dev->dev);
	}
}