static int vbg_balloon_inflate()

in vboxguest/vboxguest_core.c [269:312]

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

static int vbg_balloon_inflate(struct vbg_dev *gdev, u32 chunk_idx)
{
	struct vmmdev_memballoon_change *req = gdev->mem_balloon.change_req;
	struct page **pages;
	int i, rc, ret;

	pages = kmalloc_array(VMMDEV_MEMORY_BALLOON_CHUNK_PAGES,
			      sizeof(*pages),
			      GFP_KERNEL | __GFP_NOWARN);
	if (!pages)
		return -ENOMEM;

	req->header.size = sizeof(*req);
	req->inflate = true;
	req->pages = VMMDEV_MEMORY_BALLOON_CHUNK_PAGES;

	for (i = 0; i < VMMDEV_MEMORY_BALLOON_CHUNK_PAGES; i++) {
		pages[i] = alloc_page(GFP_KERNEL | __GFP_NOWARN);
		if (!pages[i]) {
			ret = -ENOMEM;
			goto out_error;
		}

		req->phys_page[i] = page_to_phys(pages[i]);
	}

	rc = vbg_req_perform(gdev, req);
	if (rc < 0) {
		vbg_err("%s error, rc: %d\n", __func__, rc);
		ret = vbg_status_code_to_errno(rc);
		goto out_error;
	}

	gdev->mem_balloon.pages[chunk_idx] = pages;

	return 0;

out_error:
	while (--i >= 0)
		__free_page(pages[i]);
	kfree(pages);

	return ret;
}