iommu: store DT-probed IOMMU data privately

Since the data pointer in the DT node is public and may be overwritten
by conflicting code, move the DT-probed IOMMU ops to a private list
where they will be safe.

Acked-by: Grant Likely <grant.likely@linaro.org>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
[will: added missing #include and missing ')']
Signed-off-by: Will Deacon <will.deacon@arm.com>

1 files changed, 2 insertions, 10 deletions

diff --git a/include/linux/of_iommu.h b/include/linux/of_iommu.h
index d03abbb11c34..16c75547d725 100644
--- a/include/linux/of_iommu.h
+++ b/include/linux/of_iommu.h
@@ -31,16 +31,8 @@ static inline struct iommu_ops *of_iommu_configure(struct device *dev)
 
 #endif  /* CONFIG_OF_IOMMU */
 
-static inline void of_iommu_set_ops(struct device_node *np,
-                                    const struct iommu_ops *ops)
-{
-        np->data = (struct iommu_ops *)ops;
-}
-
-static inline struct iommu_ops *of_iommu_get_ops(struct device_node *np)
-{
-        return np->data;
-}
+void of_iommu_set_ops(struct device_node *np, struct iommu_ops *ops);
+struct iommu_ops *of_iommu_get_ops(struct device_node *np);
 
 extern struct of_device_id __iommu_of_table;