static int cs_char_open()

in clients/cmt_speech.c [1274:1317]

• 36 lines of code
• 4 McCabe index (conditional complexity)

static int cs_char_open(struct inode *unused, struct file *file)
{
	int ret = 0;
	unsigned long p;

	spin_lock_bh(&cs_char_data.lock);
	if (cs_char_data.opened) {
		ret = -EBUSY;
		spin_unlock_bh(&cs_char_data.lock);
		goto out1;
	}
	cs_char_data.opened = 1;
	cs_char_data.dataind_pending = 0;
	spin_unlock_bh(&cs_char_data.lock);

	p = get_zeroed_page(GFP_KERNEL);
	if (!p) {
		ret = -ENOMEM;
		goto out2;
	}

	ret = cs_hsi_start(&cs_char_data.hi, cs_char_data.cl, p, CS_MMAP_SIZE);
	if (ret) {
		dev_err(&cs_char_data.cl->device, "Unable to initialize HSI\n");
		goto out3;
	}

	/* these are only used in release so lock not needed */
	cs_char_data.mmap_base = p;
	cs_char_data.mmap_size = CS_MMAP_SIZE;

	file->private_data = &cs_char_data;

	return 0;

out3:
	free_page(p);
out2:
	spin_lock_bh(&cs_char_data.lock);
	cs_char_data.opened = 0;
	spin_unlock_bh(&cs_char_data.lock);
out1:
	return ret;
}