iommu: remove iommu_dev_feature_enabled

Remove the unused iommu_dev_feature_enabled function.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/20220708080616.238833-3-hch@lst.de
Signed-off-by: Joerg Roedel <jroedel@suse.de>

diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
index 1b6c17d..4d30a8d 100644 (file)
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
@@ -2853,7 +2853,6 @@ static struct iommu_ops arm_smmu_ops = {
        .of_xlate               = arm_smmu_of_xlate,
        .get_resv_regions       = arm_smmu_get_resv_regions,
        .put_resv_regions       = generic_iommu_put_resv_regions,
-       .dev_feat_enabled       = arm_smmu_dev_feature_enabled,
        .dev_enable_feat        = arm_smmu_dev_enable_feature,
        .dev_disable_feat       = arm_smmu_dev_disable_feature,
        .sva_bind               = arm_smmu_sva_bind,

diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 0aa1416..1bb016a 100644 (file)
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -2760,19 +2760,6 @@ int iommu_dev_disable_feature(struct device *dev, enum iommu_dev_features feat)
 }
 EXPORT_SYMBOL_GPL(iommu_dev_disable_feature);
 
-bool iommu_dev_feature_enabled(struct device *dev, enum iommu_dev_features feat)
-{
-       if (dev->iommu && dev->iommu->iommu_dev) {
-               const struct iommu_ops *ops = dev->iommu->iommu_dev->ops;
-
-               if (ops->dev_feat_enabled)
-                       return ops->dev_feat_enabled(dev, feat);
-       }
-
-       return false;
-}
-EXPORT_SYMBOL_GPL(iommu_dev_feature_enabled);
-
 /**
  * iommu_sva_bind_device() - Bind a process address space to a device
  * @dev: the device

diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index a3acdb4..0bc2eb1 100644 (file)
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -215,7 +215,6 @@ struct iommu_iotlb_gather {
  *                      driver init to device driver init (default no)
  * @dev_has/enable/disable_feat: per device entries to check/enable/disable
  *                               iommu specific features.
- * @dev_feat_enabled: check enabled feature
  * @sva_bind: Bind process address space to device
  * @sva_unbind: Unbind process address space from device
  * @sva_get_pasid: Get PASID associated to a SVA handle
@@ -247,7 +246,6 @@ struct iommu_ops {
        bool (*is_attach_deferred)(struct device *dev);
 
        /* Per device IOMMU features */
-       bool (*dev_feat_enabled)(struct device *dev, enum iommu_dev_features f);
        int (*dev_enable_feat)(struct device *dev, enum iommu_dev_features f);
        int (*dev_disable_feat)(struct device *dev, enum iommu_dev_features f);
 
@@ -670,7 +668,6 @@ void iommu_release_device(struct device *dev);
 
 int iommu_dev_enable_feature(struct device *dev, enum iommu_dev_features f);
 int iommu_dev_disable_feature(struct device *dev, enum iommu_dev_features f);
-bool iommu_dev_feature_enabled(struct device *dev, enum iommu_dev_features f);
 
 struct iommu_sva *iommu_sva_bind_device(struct device *dev,
                                        struct mm_struct *mm,
@@ -997,12 +994,6 @@ const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode)
        return NULL;
 }
 
-static inline bool
-iommu_dev_feature_enabled(struct device *dev, enum iommu_dev_features feat)
-{
-       return false;
-}
-
 static inline int
 iommu_dev_enable_feature(struct device *dev, enum iommu_dev_features feat)
 {