int dma_buf_stats_setup()

in dma-buf-sysfs-stats.c [171:205]

• 26 lines of code
• 6 McCabe index (conditional complexity)

int dma_buf_stats_setup(struct dma_buf *dmabuf)
{
	struct dma_buf_sysfs_entry *sysfs_entry;
	int ret;

	if (!dmabuf || !dmabuf->file)
		return -EINVAL;

	if (!dmabuf->exp_name) {
		pr_err("exporter name must not be empty if stats needed\n");
		return -EINVAL;
	}

	sysfs_entry = kzalloc(sizeof(struct dma_buf_sysfs_entry), GFP_KERNEL);
	if (!sysfs_entry)
		return -ENOMEM;

	sysfs_entry->kobj.kset = dma_buf_per_buffer_stats_kset;
	sysfs_entry->dmabuf = dmabuf;

	dmabuf->sysfs_entry = sysfs_entry;

	/* create the directory for buffer stats */
	ret = kobject_init_and_add(&sysfs_entry->kobj, &dma_buf_ktype, NULL,
				   "%lu", file_inode(dmabuf->file)->i_ino);
	if (ret)
		goto err_sysfs_dmabuf;

	return 0;

err_sysfs_dmabuf:
	kobject_put(&sysfs_entry->kobj);
	dmabuf->sysfs_entry = NULL;
	return ret;
}