6.1-stable review patch. If anyone has any objections, please let me know.
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From: Juergen Gross jgross@suse.com
[ Upstream commit c3dea3d54f4d399f8044547f0f1abdccbdfb0fee ]
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: 7250f422da04 ("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 Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/xen/swiotlb-xen.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c index cf52964f057b3..0451e6ebc21a3 100644 --- a/drivers/xen/swiotlb-xen.c +++ b/drivers/xen/swiotlb-xen.c @@ -146,7 +146,7 @@ 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) @@ -178,7 +178,7 @@ 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)))