AMD IOMMU: use iommu_device_max_index
AMD IOMMU can use iommu_device_max_index() instead of the homegrown
function.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index c192121..3b346c6 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -470,10 +470,6 @@
* efficient allocator.
*
****************************************************************************/
-static unsigned long dma_mask_to_pages(unsigned long mask)
-{
- return PAGE_ALIGN(mask) >> PAGE_SHIFT;
-}
/*
* The address allocator core function.
@@ -486,14 +482,14 @@
unsigned long align_mask,
u64 dma_mask)
{
- unsigned long limit = dma_mask_to_pages(dma_mask);
+ unsigned long limit;
unsigned long address;
- unsigned long size = dom->aperture_size >> PAGE_SHIFT;
unsigned long boundary_size;
boundary_size = ALIGN(dma_get_seg_boundary(dev) + 1,
PAGE_SIZE) >> PAGE_SHIFT;
- limit = limit < size ? limit : size;
+ limit = iommu_device_max_index(dom->aperture_size >> PAGE_SHIFT, 0,
+ dma_mask >> PAGE_SHIFT);
if (dom->next_bit >= limit) {
dom->next_bit = 0;