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path: root/drivers/iommu/dma-iommu.c
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Diffstat (limited to 'drivers/iommu/dma-iommu.c')
-rw-r--r--drivers/iommu/dma-iommu.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
index 3a20db4f8604..72d6182666cb 100644
--- a/drivers/iommu/dma-iommu.c
+++ b/drivers/iommu/dma-iommu.c
@@ -21,10 +21,13 @@
#include <linux/device.h>
#include <linux/dma-iommu.h>
+#include <linux/gfp.h>
#include <linux/huge_mm.h>
#include <linux/iommu.h>
#include <linux/iova.h>
#include <linux/mm.h>
+#include <linux/scatterlist.h>
+#include <linux/vmalloc.h>
int iommu_dma_init(void)
{
@@ -191,6 +194,7 @@ static struct page **__iommu_dma_alloc_pages(unsigned int count, gfp_t gfp)
{
struct page **pages;
unsigned int i = 0, array_size = count * sizeof(*pages);
+ unsigned int order = MAX_ORDER;
if (array_size <= PAGE_SIZE)
pages = kzalloc(array_size, GFP_KERNEL);
@@ -204,14 +208,15 @@ static struct page **__iommu_dma_alloc_pages(unsigned int count, gfp_t gfp)
while (count) {
struct page *page = NULL;
- int j, order = __fls(count);
+ int j;
/*
* Higher-order allocations are a convenience rather
* than a necessity, hence using __GFP_NORETRY until
* falling back to single-page allocations.
*/
- for (order = min(order, MAX_ORDER); order > 0; order--) {
+ for (order = min_t(unsigned int, order, __fls(count));
+ order > 0; order--) {
page = alloc_pages(gfp | __GFP_NORETRY, order);
if (!page)
continue;
@@ -453,7 +458,7 @@ int iommu_dma_map_sg(struct device *dev, struct scatterlist *sg,
size_t s_offset = iova_offset(iovad, s->offset);
size_t s_length = s->length;
- sg_dma_address(s) = s->offset;
+ sg_dma_address(s) = s_offset;
sg_dma_len(s) = s_length;
s->offset -= s_offset;
s_length = iova_align(iovad, s_length + s_offset);