diff mbox series

[05/14] xen-swiotlb: use is_swiotlb_buffer in is_xen_swiotlb_buffer

Message ID 20210301074436.919889-6-hch@lst.de (mailing list archive)
State New
Headers show
Series [01/14] powerpc/svm: stop using io_tlb_start | expand

Commit Message

Christoph Hellwig March 1, 2021, 7:44 a.m. UTC
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>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
 drivers/xen/swiotlb-xen.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)
diff mbox series

Patch

diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c
index 4e8a4e14942afd..bffb35993c9d5f 100644
--- a/drivers/xen/swiotlb-xen.c
+++ b/drivers/xen/swiotlb-xen.c
@@ -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;
 }