From 7fcad5e3715adb31ec3a5a522c8fe87caa2569af Mon Sep 17 00:00:00 2001 From: "Aneesh Kumar K.V (Arm)" Date: Fri, 17 Jul 2026 23:34:30 +0530 Subject: dma: swiotlb: pass mapping attributes by reference Change swiotlb_tbl_map_single() to take the DMA mapping attributes by reference and update the direct callers accordingly. This is a preparatory change for a follow-up patch which updates the attributes based on the selected swiotlb pool. Keeping the signature change separate makes the follow-up patch easier to review. No functional change in this patch. Reviewed-by: Jason Gunthorpe Tested-by: Michael Kelley Tested-by: Mostafa Saleh Reviewed-by: Petr Tesarik Signed-off-by: Aneesh Kumar K.V (Arm) Link: https://lore.kernel.org/r/20260717180442.110954-13-aneesh.kumar@kernel.org Signed-off-by: Marek Szyprowski --- kernel/dma/swiotlb.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'kernel') diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c index 908de28aceb2..046ae92c4832 100644 --- a/kernel/dma/swiotlb.c +++ b/kernel/dma/swiotlb.c @@ -1396,7 +1396,7 @@ static unsigned long mem_used(struct io_tlb_mem *mem) */ phys_addr_t swiotlb_tbl_map_single(struct device *dev, phys_addr_t orig_addr, size_t mapping_size, unsigned int alloc_align_mask, - enum dma_data_direction dir, unsigned long attrs) + enum dma_data_direction dir, unsigned long *attrs) { struct io_tlb_mem *mem = dev->dma_io_tlb_mem; unsigned int offset; @@ -1430,7 +1430,7 @@ phys_addr_t swiotlb_tbl_map_single(struct device *dev, phys_addr_t orig_addr, size = ALIGN(mapping_size + offset, alloc_align_mask + 1); index = swiotlb_find_slots(dev, orig_addr, size, alloc_align_mask, &pool); if (index == -1) { - if (!(attrs & DMA_ATTR_NO_WARN)) + if (!(*attrs & DMA_ATTR_NO_WARN)) dev_warn_ratelimited(dev, "swiotlb buffer is full (sz: %zd bytes), total %lu (slots), used %lu (slots)\n", size, mem->nslabs, mem_used(mem)); @@ -1609,7 +1609,7 @@ dma_addr_t swiotlb_map(struct device *dev, phys_addr_t paddr, size_t size, trace_swiotlb_bounced(dev, phys_to_dma(dev, paddr), size); - swiotlb_addr = swiotlb_tbl_map_single(dev, paddr, size, 0, dir, attrs); + swiotlb_addr = swiotlb_tbl_map_single(dev, paddr, size, 0, dir, &attrs); if (swiotlb_addr == (phys_addr_t)DMA_MAPPING_ERROR) return DMA_MAPPING_ERROR; -- cgit v1.2.3