[PATCH v6 3/5] iommu: dma: Use of_iommu_get_resv_regions()

[Thierry Reding <thierry.reding@gmail.com>]

From: Thierry Reding <treding@nvidia.com>

For device tree nodes, use the standard of_iommu_get_resv_regions()
implementation to obtain the reserved memory regions associated with a
device.

Cc: Rob Herring <robh+dt@kernel.org>
Cc: Frank Rowand <frowand.list@gmail.com>
Cc: devicetree@vger.kernel.org
Signed-off-by: Thierry Reding <treding@nvidia.com>
---
 drivers/iommu/dma-iommu.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
index 1910f4f1612b..84fad59bc789 100644
--- a/drivers/iommu/dma-iommu.c
+++ b/drivers/iommu/dma-iommu.c
@@ -23,6 +23,7 @@
 #include <linux/list_sort.h>
 #include <linux/mm.h>
 #include <linux/mutex.h>
+#include <linux/of_iommu.h>
 #include <linux/pci.h>
 #include <linux/scatterlist.h>
 #include <linux/spinlock.h>
@@ -389,6 +390,8 @@ void iommu_dma_get_resv_regions(struct device *dev, struct list_head *list)
 	if (!is_of_node(dev_iommu_fwspec_get(dev)->iommu_fwnode))
 		iort_iommu_msi_get_resv_regions(dev, list);
 
+	if (dev->of_node)
+		of_iommu_get_resv_regions(dev, list);
 }
 EXPORT_SYMBOL(iommu_dma_get_resv_regions);
 
-- 
2.36.1