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-rw-r--r--drivers/vfio/vfio_iommu_type1.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c
index a6d632d44c82..0e4e71799290 100644
--- a/drivers/vfio/vfio_iommu_type1.c
+++ b/drivers/vfio/vfio_iommu_type1.c
@@ -227,11 +227,12 @@ static void vfio_dma_bitmap_free(struct vfio_dma *dma)
static void vfio_dma_populate_bitmap(struct vfio_dma *dma, size_t pgsize)
{
struct rb_node *p;
+ unsigned long pgshift = __ffs(pgsize);
for (p = rb_first(&dma->pfn_list); p; p = rb_next(p)) {
struct vfio_pfn *vpfn = rb_entry(p, struct vfio_pfn, node);
- bitmap_set(dma->bitmap, (vpfn->iova - dma->iova) / pgsize, 1);
+ bitmap_set(dma->bitmap, (vpfn->iova - dma->iova) >> pgshift, 1);
}
}