[RFC PATCHES 03/17] iommu: Add helper to set iopf handler for domain

[Lu Baolu <baolu.lu@linux.intel.com>]

To avoid open code everywhere. No intentional functionality change.

Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
---
 include/linux/iommu.h | 10 ++++++++++
 drivers/iommu/iommu.c |  3 +--
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index fce7ad81206f..f554328528bc 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -273,6 +273,16 @@ static inline bool iommu_is_dma_domain(struct iommu_domain *domain)
 	return domain->type & __IOMMU_DOMAIN_DMA_API;
 }
 
+static inline void
+iommu_domain_set_iopf_handler(struct iommu_domain *domain,
+		enum iommu_page_response_code (*handler)(struct iommu_fault *fault,
+							 void *data),
+		void *data)
+{
+	domain->iopf_handler = handler;
+	domain->fault_data = data;
+}
+
 enum iommu_cap {
 	IOMMU_CAP_CACHE_COHERENCY,	/* IOMMU_CACHE is supported */
 	IOMMU_CAP_NOEXEC,		/* IOMMU_NOEXEC flag */
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 13a2e0e26884..fd65ed1d3642 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -3419,8 +3419,7 @@ struct iommu_domain *iommu_sva_domain_alloc(struct device *dev,
 	domain->type = IOMMU_DOMAIN_SVA;
 	mmgrab(mm);
 	domain->mm = mm;
-	domain->iopf_handler = iommu_sva_handle_iopf;
-	domain->fault_data = mm;
+	iommu_domain_set_iopf_handler(domain, iommu_sva_handle_iopf, mm);
 
 	return domain;
 }
-- 
2.34.1