Make sure that xen_swiotlb_init allocates buffers that is DMA capable.
Signed-off-by: Chen Baozi <baoz...@gmail.com>
---
drivers/xen/swiotlb-xen.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c
index 810ad41..7345afd 100644
--- a/drivers/xen/swiotlb-xen.c
+++ b/drivers/xen/swiotlb-xen.c
@@ -235,7 +235,8 @@ retry:
#define SLABS_PER_PAGE (1 << (PAGE_SHIFT - IO_TLB_SHIFT))
#define IO_TLB_MIN_SLABS ((1<<20) >> IO_TLB_SHIFT)
while ((SLABS_PER_PAGE << order) > IO_TLB_MIN_SLABS) {
- xen_io_tlb_start = (void
*)__get_free_pages(__GFP_NOWARN, order);
+ xen_io_tlb_start = (void *)__get_free_pages(
+ __GFP_NOWARN|__GFP_DMA, order);
if (xen_io_tlb_start)
break;
order--;
--
2.1.4
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