Commit 16bc75f3 authored Mar 01, 2021 by Christoph Hellwig Committed by Konrad Rzeszutek Wilk Mar 17, 2021

xen-swiotlb: use is_swiotlb_buffer in is_xen_swiotlb_buffer



Use the is_swiotlb_buffer to check if a physical address is
a swiotlb buffer.  This works because xen-swiotlb does use the
same buffer as the main swiotlb code, and xen_io_tlb_{start,end}
are just the addresses for it that went through phys_to_virt.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

parent 80808d27

drivers/xen/swiotlb-xen.c

+2 −4

Original line number	Diff line number	Diff line
		@@ -111,10 +111,8 @@ static int is_xen_swiotlb_buffer(struct device *dev, dma_addr_t dma_addr)
		* have the same virtual address as another address
		* in our domain. Therefore _only_ check address within our domain.
		*/
		if (pfn_valid(PFN_DOWN(paddr))) {
		return paddr >= virt_to_phys(xen_io_tlb_start) &&
		paddr < virt_to_phys(xen_io_tlb_end);
		}
		if (pfn_valid(PFN_DOWN(paddr)))
		return is_swiotlb_buffer(paddr);
		return 0;
		}