static void update_property_block()

in xdomain.c [514:572]

• 45 lines of code
• 7 McCabe index (conditional complexity)

static void update_property_block(struct tb_xdomain *xd)
{
	mutex_lock(&xdomain_lock);
	mutex_lock(&xd->lock);
	/*
	 * If the local property block is not up-to-date, rebuild it now
	 * based on the global property template.
	 */
	if (!xd->local_property_block ||
	    xd->local_property_block_gen < xdomain_property_block_gen) {
		struct tb_property_dir *dir;
		int ret, block_len;
		u32 *block;

		dir = tb_property_copy_dir(xdomain_property_dir);
		if (!dir) {
			dev_warn(&xd->dev, "failed to copy properties\n");
			goto out_unlock;
		}

		/* Fill in non-static properties now */
		tb_property_add_text(dir, "deviceid", utsname()->nodename);
		tb_property_add_immediate(dir, "maxhopid", xd->local_max_hopid);

		ret = tb_property_format_dir(dir, NULL, 0);
		if (ret < 0) {
			dev_warn(&xd->dev, "local property block creation failed\n");
			tb_property_free_dir(dir);
			goto out_unlock;
		}

		block_len = ret;
		block = kcalloc(block_len, sizeof(*block), GFP_KERNEL);
		if (!block) {
			tb_property_free_dir(dir);
			goto out_unlock;
		}

		ret = tb_property_format_dir(dir, block, block_len);
		if (ret) {
			dev_warn(&xd->dev, "property block generation failed\n");
			tb_property_free_dir(dir);
			kfree(block);
			goto out_unlock;
		}

		tb_property_free_dir(dir);
		/* Release the previous block */
		kfree(xd->local_property_block);
		/* Assign new one */
		xd->local_property_block = block;
		xd->local_property_block_len = block_len;
		xd->local_property_block_gen = xdomain_property_block_gen;
	}

out_unlock:
	mutex_unlock(&xd->lock);
	mutex_unlock(&xdomain_lock);
}