Re: [PATCH v12 4/4] iommu: dma: Use of_iommu_get_resv_regions()

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On 2022-11-17 18:54, Thierry Reding wrote:
From: Thierry Reding <treding@xxxxxxxxxx>

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

Acked-by: Robin Murphy <robin.murphy@xxxxxxx>

Cc: Rob Herring <robh+dt@xxxxxxxxxx>
Cc: Frank Rowand <frowand.list@xxxxxxxxx>
Cc: devicetree@xxxxxxxxxxxxxxx
Signed-off-by: Thierry Reding <treding@xxxxxxxxxx>
---
  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 9297b741f5e8..709b05d3aad2 100644
--- a/drivers/iommu/dma-iommu.c
+++ b/drivers/iommu/dma-iommu.c
@@ -23,6 +23,7 @@
  #include <linux/memremap.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>
@@ -391,6 +392,8 @@ 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_get_resv_regions(dev, list);
+ if (dev->of_node)
+		of_iommu_get_resv_regions(dev, list);
  }
  EXPORT_SYMBOL(iommu_dma_get_resv_regions);



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