202 		INIT_LIST_HEAD(&ioat_chan->used_desc);  in ioat_dma_enumerate_channels()
280 	if (ioat_chan->used_desc.prev) {  in ioat_dma_chan_reset_part2()
281 		desc = to_ioat_desc(ioat_chan->used_desc.prev);  in ioat_dma_chan_reset_part2()
285 		} while (&desc->node != ioat_chan->used_desc.next);  in ioat_dma_chan_reset_part2()
292 	desc = to_ioat_desc(ioat_chan->used_desc.prev);  in ioat_dma_chan_reset_part2()
331 	if (!ioat_chan->used_desc.prev)  in ioat_dma_reset_channel()
398 		    && (ioat_chan->used_desc.prev != ioat_chan->used_desc.next)  in ioat_dma_chan_watchdog()
450 		    && ioat_chan->used_desc.prev  in ioat_dma_chan_watchdog()
495 	prev = to_ioat_desc(ioat_chan->used_desc.prev);  in ioat1_tx_submit()
560 	to_ioat_desc(ioat_chan->used_desc.prev)->hw->next =  in ioat1_tx_submit()
562 	list_splice_tail(&new_chain, &ioat_chan->used_desc);  in ioat1_tx_submit()
718 	ioat_chan->used_desc.next = ioat_chan->free_desc.next;  in ioat2_dma_massage_chan_desc()
719 	ioat_chan->used_desc.prev = NULL;  in ioat2_dma_massage_chan_desc()
832 					 &ioat_chan->used_desc, node) {  in ioat_dma_free_chan_resources()
861 		INIT_LIST_HEAD(&ioat_chan->used_desc);  in ioat_dma_free_chan_resources()
930 	if (ioat_chan->used_desc.prev &&  in ioat2_dma_get_next_descriptor()
931 	    ioat_chan->used_desc.next == ioat_chan->used_desc.prev->prev) {  in ioat2_dma_get_next_descriptor()
938 		noop_desc = to_ioat_desc(ioat_chan->used_desc.next);  in ioat2_dma_get_next_descriptor()
945 		ioat_chan->used_desc.next = ioat_chan->used_desc.next->next;  in ioat2_dma_get_next_descriptor()
957 			list_add_tail(&desc->node, ioat_chan->used_desc.next);  in ioat2_dma_get_next_descriptor()
966 		ioat_chan->used_desc.next = noop_desc->node.next;  in ioat2_dma_get_next_descriptor()
968 	new = to_ioat_desc(ioat_chan->used_desc.next);  in ioat2_dma_get_next_descriptor()
970 	ioat_chan->used_desc.next = new->node.next;  in ioat2_dma_get_next_descriptor()
972 	if (ioat_chan->used_desc.prev == NULL)  in ioat2_dma_get_next_descriptor()
973 		ioat_chan->used_desc.prev = &new->node;  in ioat2_dma_get_next_descriptor()
1152 					 &ioat_chan->used_desc, node) {  in ioat_dma_memcpy_cleanup()
1194 		if (ioat_chan->used_desc.prev == NULL)  in ioat_dma_memcpy_cleanup()
1198 		desc = to_ioat_desc(ioat_chan->used_desc.next);  in ioat_dma_memcpy_cleanup()
1208 		} while (&desc->node != ioat_chan->used_desc.prev);  in ioat_dma_memcpy_cleanup()
1213 			for (desc = to_ioat_desc(ioat_chan->used_desc.prev);  in ioat_dma_memcpy_cleanup()
1215 			     &desc->node != ioat_chan->used_desc.next;  in ioat_dma_memcpy_cleanup()
1229 			if (&desc->node == ioat_chan->used_desc.next)  in ioat_dma_memcpy_cleanup()
1230 				ioat_chan->used_desc.prev = NULL;  in ioat_dma_memcpy_cleanup()
1232 				ioat_chan->used_desc.prev = &desc->node;  in ioat_dma_memcpy_cleanup()
1315 		list_add_tail(&desc->node, &ioat_chan->used_desc);  in ioat_dma_start_null_desc()