static void free_all_descbuffers(struct b43_dmaring *ring)
{
	struct b43_dmadesc_generic *desc;
	struct b43_dmadesc_meta *meta;
	int i;

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

		if (!meta->skb || b43_dma_ptr_is_poisoned(meta->skb)) {
			B43_WARN_ON(!ring->tx);
			continue;
		}
		if (ring->tx) {
			unmap_descbuffer(ring, meta->dmaaddr,
					 meta->skb->len, 1);
		} else {
			unmap_descbuffer(ring, meta->dmaaddr,
					 ring->rx_buffersize, 0);
		}
		free_descriptor_buffer(ring, meta);
	}
}
static void free_all_descbuffers(struct b43_dmaring *ring)
{
	struct b43_dmadesc_generic *desc;
	struct b43_dmadesc_meta *meta;
	int i;

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

		if (!meta->skb || b43_dma_ptr_is_poisoned(meta->skb)) {
			B43_WARN_ON(!ring->tx);
			continue;
		}
		if (ring->tx) {
			unmap_descbuffer(ring, meta->dmaaddr,
					 meta->skb->len, 1);
		} else {
			unmap_descbuffer(ring, meta->dmaaddr,
					 ring->rx_buffersize, 0);
		}
		free_descriptor_buffer(ring, meta);
	}
}