Messages in this thread Patch in this message | | | From | Petr Tesarik <> | Subject | [PATCH v1] swiotlb: move slot allocation explanation comment where it belongs | Date | Wed, 2 Aug 2023 18:30:34 +0200 |
| |
From: Petr Tesarik <petr.tesarik.ext@huawei.com>
Move the comment down in front of the loop that actually sets the list member of struct io_tlb_slot to zero.
Fixes: 26a7e094783d ("swiotlb: refactor swiotlb_tbl_map_single") Signed-off-by: Petr Tesarik <petr.tesarik.ext@huawei.com> --- kernel/dma/swiotlb.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c index d7eac84f975b..50a0e9c45c39 100644 --- a/kernel/dma/swiotlb.c +++ b/kernel/dma/swiotlb.c @@ -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 + -- 2.25.1
| |