vfio/mdev: Remove mdev_parent_ops

The last useful member in this struct is the supported_type_groups, move
it to the mdev_driver and delete mdev_parent_ops.

Replace it with mdev_driver as an argument to mdev_register_device()

Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Zhi Wang <zhi.a.wang@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20220411141403.86980-33-hch@lst.de
Reviewed-by: Kirti Wankhede <kwankhede@nvidia.com>
Reviewed-by: Zhi Wang <zhi.a.wang@intel.com>

3 files changed, 9 insertions, 12 deletions

diff --git a/drivers/vfio/mdev/mdev_core.c b/drivers/vfio/mdev/mdev_core.c
index 8b1e86b9e8bc..19a20ff420b7 100644
--- a/drivers/vfio/mdev/mdev_core.c
+++ b/drivers/vfio/mdev/mdev_core.c
@@ -109,12 +109,12 @@ static int mdev_device_remove_cb(struct device *dev, void *data)
 /*
  * mdev_register_device : Register a device
  * @dev: device structure representing parent device.
- * @ops: Parent device operation structure to be registered.
+ * @mdev_driver: Device driver to bind to the newly created mdev
  *
  * Add device to list of registered parent devices.
  * Returns a negative value on error, otherwise 0.
  */
-int mdev_register_device(struct device *dev, const struct mdev_parent_ops *ops)
+int mdev_register_device(struct device *dev, struct mdev_driver *mdev_driver)
 {
 	int ret;
 	struct mdev_parent *parent;
@@ -122,9 +122,7 @@ int mdev_register_device(struct device *dev, const struct mdev_parent_ops *ops)
 	char *envp[] = { env_string, NULL };
 
 	/* check for mandatory ops */
-	if (!ops || !ops->supported_type_groups)
-		return -EINVAL;
-	if (!ops->device_driver)
+	if (!mdev_driver->supported_type_groups)
 		return -EINVAL;
 
 	dev = get_device(dev);
@@ -151,7 +149,7 @@ int mdev_register_device(struct device *dev, const struct mdev_parent_ops *ops)
 	init_rwsem(&parent->unreg_sem);
 
 	parent->dev = dev;
-	parent->ops = ops;
+	parent->mdev_driver = mdev_driver;
 
 	if (!mdev_bus_compat_class) {
 		mdev_bus_compat_class = class_compat_register("mdev_bus");
@@ -249,7 +247,7 @@ int mdev_device_create(struct mdev_type *type, const guid_t *uuid)
 	int ret;
 	struct mdev_device *mdev, *tmp;
 	struct mdev_parent *parent = type->parent;
-	struct mdev_driver *drv = parent->ops->device_driver;
+	struct mdev_driver *drv = parent->mdev_driver;
 
 	mutex_lock(&mdev_list_lock);
 
@@ -271,7 +269,6 @@ int mdev_device_create(struct mdev_type *type, const guid_t *uuid)
 	mdev->dev.parent  = parent->dev;
 	mdev->dev.bus = &mdev_bus_type;
 	mdev->dev.release = mdev_device_release;
-	mdev->dev.groups = parent->ops->mdev_attr_groups;
 	mdev->type = type;
 	/* Pairs with the put in mdev_device_release() */
 	kobject_get(&type->kobj);
diff --git a/drivers/vfio/mdev/mdev_private.h b/drivers/vfio/mdev/mdev_private.h
index 6999c89db7b1..5a7ffd4e770f 100644
--- a/drivers/vfio/mdev/mdev_private.h
+++ b/drivers/vfio/mdev/mdev_private.h
@@ -15,7 +15,7 @@ void mdev_bus_unregister(void);
 
 struct mdev_parent {
 	struct device *dev;
-	const struct mdev_parent_ops *ops;
+	struct mdev_driver *mdev_driver;
 	struct kref ref;
 	struct list_head next;
 	struct kset *mdev_types_kset;
diff --git a/drivers/vfio/mdev/mdev_sysfs.c b/drivers/vfio/mdev/mdev_sysfs.c
index 66eef08833a4..5a3873d1a275 100644
--- a/drivers/vfio/mdev/mdev_sysfs.c
+++ b/drivers/vfio/mdev/mdev_sysfs.c
@@ -97,7 +97,7 @@ static struct mdev_type *add_mdev_supported_type(struct mdev_parent *parent,
 {
 	struct mdev_type *type;
 	struct attribute_group *group =
-		parent->ops->supported_type_groups[type_group_id];
+		parent->mdev_driver->supported_type_groups[type_group_id];
 	int ret;
 
 	if (!group->name) {
@@ -154,7 +154,7 @@ attr_create_failed:
 static void remove_mdev_supported_type(struct mdev_type *type)
 {
 	struct attribute_group *group =
-		type->parent->ops->supported_type_groups[type->type_group_id];
+		type->parent->mdev_driver->supported_type_groups[type->type_group_id];
 
 	sysfs_remove_files(&type->kobj,
 			   (const struct attribute **)group->attrs);
@@ -168,7 +168,7 @@ static int add_mdev_supported_type_groups(struct mdev_parent *parent)
 {
 	int i;
 
-	for (i = 0; parent->ops->supported_type_groups[i]; i++) {
+	for (i = 0; parent->mdev_driver->supported_type_groups[i]; i++) {
 		struct mdev_type *type;
 
 		type = add_mdev_supported_type(parent, i);