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Commit d0c8ba40 authored by Yisheng Xie's avatar Yisheng Xie Committed by Christoph Hellwig
Browse files

swiotlb: update comments to refer to physical instead of virtual addresses 



swiotlb use physical address of bounce buffer when do map and unmap,
therefore, related comment should be updated.

Signed-off-by: default avatarYisheng Xie <xieyisheng1@huawei.com>
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
parent 30fd6427

lib/swiotlb.c

+2 −3
Original line number Diff line number Diff line
@@ -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 @@ map_single(struct device *hwdev, phys_addr_t phys, size_t size, 
}



/*

 * 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,