static int aspeed_master_read()

in fsi-master-aspeed.c [255:288]

• 29 lines of code
• 5 McCabe index (conditional complexity)

static int aspeed_master_read(struct fsi_master *master, int link,
			uint8_t id, uint32_t addr, void *val, size_t size)
{
	struct fsi_master_aspeed *aspeed = to_fsi_master_aspeed(master);
	int ret;

	if (id > 0x3)
		return -EINVAL;

	addr |= id << 21;
	addr += link * FSI_HUB_LINK_SIZE;

	mutex_lock(&aspeed->lock);

	switch (size) {
	case 1:
		ret = opb_readb(aspeed, fsi_base + addr, val);
		break;
	case 2:
		ret = opb_readw(aspeed, fsi_base + addr, val);
		break;
	case 4:
		ret = opb_readl(aspeed, fsi_base + addr, val);
		break;
	default:
		ret = -EINVAL;
		goto done;
	}

	ret = check_errors(aspeed, ret);
done:
	mutex_unlock(&aspeed->lock);
	return ret;
}