swiotlb use physical address of bounce buffer when do map and unmap, therefore, related comment should be updated.
Signed-off-by: Yisheng Xie <[email protected]> --- lib/swiotlb.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/lib/swiotlb.c b/lib/swiotlb.c index fece575..e3d9445 100644 --- a/lib/swiotlb.c +++ b/lib/swiotlb.c @@ -593,9 +593,8 @@ phys_addr_t swiotlb_tbl_map_single(struct device *hwdev, } /* - * Allocates bounce buffer and returns its kernel virtual address. + * Allocates bounce buffer and returns its physical address. */ - static phys_addr_t map_single(struct device *hwdev, phys_addr_t phys, size_t size, enum dma_data_direction dir, unsigned long attrs) @@ -614,7 +613,7 @@ phys_addr_t swiotlb_tbl_map_single(struct device *hwdev, } /* - * dma_addr is the kernel virtual address of the bounce buffer to unmap. + * tlb_addr is the physical address of the bounce buffer to unmap. */ void swiotlb_tbl_unmap_single(struct device *hwdev, phys_addr_t tlb_addr, size_t size, enum dma_data_direction dir, -- 1.7.12.4
