[PATCH v3 19/20] iommu: Retire detach_dev callback

[Lu Baolu]

The detach_dev callback of domain ops is not used in the IOMMU core.
Remove this callback to avoid dead code.

Signed-off-by: Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>
---
 include/linux/iommu.h           | 2 --
 drivers/iommu/fsl_pamu_domain.c | 1 -
 drivers/iommu/msm_iommu.c       | 1 -
 drivers/iommu/mtk_iommu_v1.c    | 1 -
 drivers/iommu/omap-iommu.c      | 1 -
 drivers/iommu/s390-iommu.c      | 1 -
 drivers/iommu/tegra-gart.c      | 1 -
 drivers/iommu/tegra-smmu.c      | 1 -
 8 files changed, 9 deletions(-)

diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 3542461558fa..4c0491e5708c 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -294,7 +294,6 @@ struct iommu_ops {
  * * EBUSY	- device is attached to a domain and cannot be changed
  * * ENODEV	- device specific errors, not able to be attached
  * * <others>	- treated as ENODEV by the caller. Use is discouraged
- * @detach_dev: detach an iommu domain from a device
  * @set_dev_pasid: set an iommu domain to a pasid of device
  * @map: map a physically contiguous memory region to an iommu domain
  * @map_pages: map a physically contiguous set of pages of the same size to
@@ -315,7 +314,6 @@ struct iommu_ops {
  */
 struct iommu_domain_ops {
 	int (*attach_dev)(struct iommu_domain *domain, struct device *dev);
-	void (*detach_dev)(struct iommu_domain *domain, struct device *dev);
 	int (*set_dev_pasid)(struct iommu_domain *domain, struct device *dev,
 			     ioasid_t pasid);
 
diff --git a/drivers/iommu/fsl_pamu_domain.c b/drivers/iommu/fsl_pamu_domain.c
index b8c716e7c424..272d88e415c6 100644
--- a/drivers/iommu/fsl_pamu_domain.c
+++ b/drivers/iommu/fsl_pamu_domain.c
@@ -463,7 +463,6 @@ static const struct iommu_ops fsl_pamu_ops = {
 	.set_platform_dma = fsl_pamu_set_platform_dma;
 	.default_domain_ops = &(const struct iommu_domain_ops) {
 		.attach_dev	= fsl_pamu_attach_device,
-		.detach_dev	= fsl_pamu_detach_device,
 		.iova_to_phys	= fsl_pamu_iova_to_phys,
 		.free		= fsl_pamu_domain_free,
 	}
diff --git a/drivers/iommu/msm_iommu.c b/drivers/iommu/msm_iommu.c
index 3eb1bc668cad..564f9dc0140d 100644
--- a/drivers/iommu/msm_iommu.c
+++ b/drivers/iommu/msm_iommu.c
@@ -691,7 +691,6 @@ static struct iommu_ops msm_iommu_ops = {
 	.of_xlate = qcom_iommu_of_xlate,
 	.default_domain_ops = &(const struct iommu_domain_ops) {
 		.attach_dev	= msm_iommu_attach_dev,
-		.detach_dev	= msm_iommu_detach_dev,
 		.map_pages	= msm_iommu_map,
 		.unmap_pages	= msm_iommu_unmap,
 		/*
diff --git a/drivers/iommu/mtk_iommu_v1.c b/drivers/iommu/mtk_iommu_v1.c
index 6a815da8a020..c2d80b7a377f 100644
--- a/drivers/iommu/mtk_iommu_v1.c
+++ b/drivers/iommu/mtk_iommu_v1.c
@@ -597,7 +597,6 @@ static const struct iommu_ops mtk_iommu_v1_ops = {
 	.owner          = THIS_MODULE,
 	.default_domain_ops = &(const struct iommu_domain_ops) {
 		.attach_dev	= mtk_iommu_v1_attach_device,
-		.detach_dev	= mtk_iommu_v1_detach_device,
 		.map_pages	= mtk_iommu_v1_map,
 		.unmap_pages	= mtk_iommu_v1_unmap,
 		.iova_to_phys	= mtk_iommu_v1_iova_to_phys,
diff --git a/drivers/iommu/omap-iommu.c b/drivers/iommu/omap-iommu.c
index aa3858a48bbf..c3eedab00038 100644
--- a/drivers/iommu/omap-iommu.c
+++ b/drivers/iommu/omap-iommu.c
@@ -1749,7 +1749,6 @@ static const struct iommu_ops omap_iommu_ops = {
 	.pgsize_bitmap	= OMAP_IOMMU_PGSIZES,
 	.default_domain_ops = &(const struct iommu_domain_ops) {
 		.attach_dev	= omap_iommu_attach_dev,
-		.detach_dev	= omap_iommu_detach_dev,
 		.map		= omap_iommu_map,
 		.unmap		= omap_iommu_unmap,
 		.iova_to_phys	= omap_iommu_iova_to_phys,
diff --git a/drivers/iommu/s390-iommu.c b/drivers/iommu/s390-iommu.c
index 507bbc2c9b58..33dba5ee5e20 100644
--- a/drivers/iommu/s390-iommu.c
+++ b/drivers/iommu/s390-iommu.c
@@ -448,7 +448,6 @@ static const struct iommu_ops s390_iommu_ops = {
 	.get_resv_regions = s390_iommu_get_resv_regions,
 	.default_domain_ops = &(const struct iommu_domain_ops) {
 		.attach_dev	= s390_iommu_attach_device,
-		.detach_dev	= s390_iommu_detach_device,
 		.map_pages	= s390_iommu_map_pages,
 		.unmap_pages	= s390_iommu_unmap_pages,
 		.flush_iotlb_all = s390_iommu_flush_iotlb_all,
diff --git a/drivers/iommu/tegra-gart.c b/drivers/iommu/tegra-gart.c
index f56e40b5c47a..a532b333233f 100644
--- a/drivers/iommu/tegra-gart.c
+++ b/drivers/iommu/tegra-gart.c
@@ -283,7 +283,6 @@ static const struct iommu_ops gart_iommu_ops = {
 	.of_xlate	= gart_iommu_of_xlate,
 	.default_domain_ops = &(const struct iommu_domain_ops) {
 		.attach_dev	= gart_iommu_attach_dev,
-		.detach_dev	= gart_iommu_detach_dev,
 		.map		= gart_iommu_map,
 		.unmap		= gart_iommu_unmap,
 		.iova_to_phys	= gart_iommu_iova_to_phys,
diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c
index a36e163e5cc1..247d485904c1 100644
--- a/drivers/iommu/tegra-smmu.c
+++ b/drivers/iommu/tegra-smmu.c
@@ -978,7 +978,6 @@ static const struct iommu_ops tegra_smmu_ops = {
 	.pgsize_bitmap = SZ_4K,
 	.default_domain_ops = &(const struct iommu_domain_ops) {
 		.attach_dev	= tegra_smmu_attach_dev,
-		.detach_dev	= tegra_smmu_detach_dev,
 		.map		= tegra_smmu_map,
 		.unmap		= tegra_smmu_unmap,
 		.iova_to_phys	= tegra_smmu_iova_to_phys,
-- 
2.34.1