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xen/swiotlb: fix allocated size

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The allocated size in xen_swiotlb_alloc_coherent() and
xen_swiotlb_free_coherent() is calculated wrong for the case of
XEN_PAGE_SIZE not matching PAGE_SIZE. Fix that.

Fixes: 7250f422da ("xen-swiotlb: use actually allocated size on check physical continuous")
Reported-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Signed-off-by: Juergen Gross <jgross@suse.com>
This commit is contained in:
Juergen Gross 2024-09-15 13:06:44 +02:00
parent 9f40ec84a7
commit c3dea3d54f
1 changed files with 2 additions and 2 deletions
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4
drivers/xen/swiotlb-xen.c
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@ -147,7 +147,7 @@ xen_swiotlb_alloc_coherent(struct device *dev, size_t size,
void *ret;
/* Align the allocation to the Xen page size */
size = 1UL << (order + XEN_PAGE_SHIFT);
size = ALIGN(size, XEN_PAGE_SIZE);
ret = (void *)__get_free_pages(flags, get_order(size));
if (!ret)
@ -179,7 +179,7 @@ xen_swiotlb_free_coherent(struct device *dev, size_t size, void *vaddr,
int order = get_order(size);
/* Convert the size to actually allocated. */
size = 1UL << (order + XEN_PAGE_SHIFT);
size = ALIGN(size, XEN_PAGE_SIZE);
if (WARN_ON_ONCE(dma_handle + size - 1 > dev->coherent_dma_mask) ||
WARN_ON_ONCE(range_straddles_page_boundary(phys, size)))