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Revert "xen/swiotlb: add alignment check for dma buffers"

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This reverts commit 53d2af3cf5.
This commit is contained in:
Ksawlii 2024-11-24 00:23:24 +01:00
parent dc8e64e562
commit 846de9e641
1 changed files with 0 additions and 6 deletions
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6
drivers/xen/swiotlb-xen.c
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@ -91,15 +91,9 @@ static inline int range_straddles_page_boundary(phys_addr_t p, size_t size)
{ {
unsigned long next_bfn, xen_pfn = XEN_PFN_DOWN(p); unsigned long next_bfn, xen_pfn = XEN_PFN_DOWN(p);
unsigned int i, nr_pages = XEN_PFN_UP(xen_offset_in_page(p) + size); unsigned int i, nr_pages = XEN_PFN_UP(xen_offset_in_page(p) + size);
phys_addr_t algn = 1ULL << (get_order(size) + PAGE_SHIFT);
next_bfn = pfn_to_bfn(xen_pfn); next_bfn = pfn_to_bfn(xen_pfn);
/* If buffer is physically aligned, ensure DMA alignment. */
if (IS_ALIGNED(p, algn) &&
!IS_ALIGNED((phys_addr_t)next_bfn << XEN_PAGE_SHIFT, algn))
return 1;
for (i = 1; i < nr_pages; i++) for (i = 1; i < nr_pages; i++)
if (pfn_to_bfn(++xen_pfn) != ++next_bfn) if (pfn_to_bfn(++xen_pfn) != ++next_bfn)
return 1; return 1;