static int alloc_initial_descbuffers(struct b43_dmaring *ring)
{
	int i, err = -ENOMEM;
	struct b43_dmadesc_generic *desc;
	struct b43_dmadesc_meta *meta;

	for (i = 0; i < ring->nr_slots; i++) {
		desc = ring->ops->idx2desc(ring, i, &meta);

		err = setup_rx_descbuffer(ring, desc, meta, GFP_KERNEL);
		if (err) {
			b43err(ring->dev->wl,
			       "Failed to allocate initial descbuffers\n");
			goto err_unwind;
		}
	}
	mb();
	ring->used_slots = ring->nr_slots;
	err = 0;
      out:
	return err;

      err_unwind:
	for (i--; i >= 0; i--) {
		desc = ring->ops->idx2desc(ring, i, &meta);

		unmap_descbuffer(ring, meta->dmaaddr, ring->rx_buffersize, 0);
		dev_kfree_skb(meta->skb);
	}
	goto out;
}
static int alloc_initial_descbuffers(struct b43_dmaring *ring)
{
	int i, err = -ENOMEM;
	struct b43_dmadesc_generic *desc;
	struct b43_dmadesc_meta *meta;

	for (i = 0; i < ring->nr_slots; i++) {
		desc = ring->ops->idx2desc(ring, i, &meta);

		err = setup_rx_descbuffer(ring, desc, meta, GFP_KERNEL);
		if (err) {
			b43err(ring->dev->wl,
			       "Failed to allocate initial descbuffers\n");
			goto err_unwind;
		}
	}
	mb();
	ring->used_slots = ring->nr_slots;
	err = 0;
      out:
	return err;

      err_unwind:
	for (i--; i >= 0; i--) {
		desc = ring->ops->idx2desc(ring, i, &meta);

		unmap_descbuffer(ring, meta->dmaaddr, ring->rx_buffersize, 0);
		dev_kfree_skb(meta->skb);
	}
	goto out;
}