uacce: Remove unnecessary IOMMU_DEV_FEAT_IOPF

None of the drivers implement anything for IOMMU_DEV_FEAT_IOPF anymore,
remove it to avoid dead code.

Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Acked-by: Zhangfei Gao <zhangfei.gao@linaro.org>
Tested-by: Zhangfei Gao <zhangfei.gao@linaro.org>
Link: https://lore.kernel.org/r/20250418080130.1844424-7-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>

diff --git a/drivers/misc/uacce/uacce.c b/drivers/misc/uacce/uacce.c
index 2a1db2abeeca0a0fcf94292c7a0a8e0d16e198a8..42e7d2a2a90c6ed995e65061a027c4ba4d02303d 100644 (file)
--- a/drivers/misc/uacce/uacce.c
+++ b/drivers/misc/uacce/uacce.c
@@ -465,31 +465,6 @@ static void uacce_release(struct device *dev)
        kfree(uacce);
 }
 
-static unsigned int uacce_enable_sva(struct device *parent, unsigned int flags)
-{
-       int ret;
-
-       if (!(flags & UACCE_DEV_SVA))
-               return flags;
-
-       flags &= ~UACCE_DEV_SVA;
-
-       ret = iommu_dev_enable_feature(parent, IOMMU_DEV_FEAT_IOPF);
-       if (ret) {
-               dev_err(parent, "failed to enable IOPF feature! ret = %pe\n", ERR_PTR(ret));
-               return flags;
-       }
-       return flags | UACCE_DEV_SVA;
-}
-
-static void uacce_disable_sva(struct uacce_device *uacce)
-{
-       if (!(uacce->flags & UACCE_DEV_SVA))
-               return;
-
-       iommu_dev_disable_feature(uacce->parent, IOMMU_DEV_FEAT_IOPF);
-}
-
 /**
  * uacce_alloc() - alloc an accelerator
  * @parent: pointer of uacce parent device
@@ -509,8 +484,6 @@ struct uacce_device *uacce_alloc(struct device *parent,
        if (!uacce)
                return ERR_PTR(-ENOMEM);
 
-       flags = uacce_enable_sva(parent, flags);
-
        uacce->parent = parent;
        uacce->flags = flags;
        uacce->ops = interface->ops;
@@ -533,7 +506,6 @@ struct uacce_device *uacce_alloc(struct device *parent,
        return uacce;
 
 err_with_uacce:
-       uacce_disable_sva(uacce);
        kfree(uacce);
        return ERR_PTR(ret);
 }
@@ -596,9 +568,6 @@ void uacce_remove(struct uacce_device *uacce)
                unmap_mapping_range(q->mapping, 0, 0, 1);
        }
 
-       /* disable sva now since no opened queues */
-       uacce_disable_sva(uacce);
-
        if (uacce->cdev)
                cdev_device_del(uacce->cdev, &uacce->dev);
        xa_erase(&uacce_xa, uacce->dev_id);