static int cma_heap_vmap()

in heaps/cma_heap.c [205:230]

• 23 lines of code
• 3 McCabe index (conditional complexity)

static int cma_heap_vmap(struct dma_buf *dmabuf, struct dma_buf_map *map)
{
	struct cma_heap_buffer *buffer = dmabuf->priv;
	void *vaddr;
	int ret = 0;

	mutex_lock(&buffer->lock);
	if (buffer->vmap_cnt) {
		buffer->vmap_cnt++;
		dma_buf_map_set_vaddr(map, buffer->vaddr);
		goto out;
	}

	vaddr = cma_heap_do_vmap(buffer);
	if (IS_ERR(vaddr)) {
		ret = PTR_ERR(vaddr);
		goto out;
	}
	buffer->vaddr = vaddr;
	buffer->vmap_cnt++;
	dma_buf_map_set_vaddr(map, buffer->vaddr);
out:
	mutex_unlock(&buffer->lock);

	return ret;
}