Commit f94cb36e authored by Petr Tesarik's avatar Petr Tesarik Committed by Christoph Hellwig
Browse files

swiotlb: move slot allocation explanation comment where it belongs 



Move the comment down in front of the loop that actually sets the list
member of struct io_tlb_slot to zero.

Fixes: 26a7e094 ("swiotlb: refactor swiotlb_tbl_map_single")
Signed-off-by: default avatarPetr Tesarik <petr.tesarik.ext@huawei.com>
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
parent 1395706a

kernel/dma/swiotlb.c

+5 −5
Original line number Diff line number Diff line
@@ -1018,11 +1018,6 @@ static int swiotlb_area_find_slots(struct device *dev, struct io_tlb_pool *pool, 
			continue;

		}



		/*

		 * If we find a slot that indicates we have 'nslots' number of

		 * contiguous buffers, we allocate the buffers from that slot

		 * and mark the entries as '0' indicating unavailable.

		 */

		if (!iommu_is_span_boundary(slot_index, nslots,

					    nr_slots(tbl_dma_addr),

					    max_slots)) {
@@ -1038,6 +1033,11 @@ static int swiotlb_area_find_slots(struct device *dev, struct io_tlb_pool *pool, 
	return -1;



found:

	/*

	 * If we find a slot that indicates we have 'nslots' number of

	 * contiguous buffers, we allocate the buffers from that slot onwards

	 * and set the list of free entries to '0' indicating unavailable.

	 */

	for (i = slot_index; i < slot_index + nslots; i++) {

		pool->slots[i].list = 0;

		pool->slots[i].alloc_size = alloc_size - (offset +