The next patch will use these in mdev_sysfs.c
While here remove the now dead code checks for NULL, a mdev_type can never
have a NULL parent.
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx>
Reviewed-by: Cornelia Huck <cohuck@xxxxxxxxxx>
Signed-off-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
---
drivers/vfio/mdev/mdev_core.c | 23 +++--------------------
drivers/vfio/mdev/mdev_private.h | 12 ++++++++++++
2 files changed, 15 insertions(+), 20 deletions(-)
diff --git a/drivers/vfio/mdev/mdev_core.c b/drivers/vfio/mdev/mdev_core.c
index 5ca0efa5266bad..7ec21c907397a5 100644
--- a/drivers/vfio/mdev/mdev_core.c
+++ b/drivers/vfio/mdev/mdev_core.c
@@ -45,7 +45,7 @@ static struct mdev_parent *__find_parent_device(struct device *dev)
return NULL;
}
-static void mdev_release_parent(struct kref *kref)
+void mdev_release_parent(struct kref *kref)
{
struct mdev_parent *parent = container_of(kref, struct mdev_parent,
ref);
@@ -55,20 +55,6 @@ static void mdev_release_parent(struct kref *kref)
put_device(dev);
}
-static struct mdev_parent *mdev_get_parent(struct mdev_parent *parent)
-{
- if (parent)
- kref_get(&parent->ref);
-
- return parent;
-}
-
-static void mdev_put_parent(struct mdev_parent *parent)
-{
- if (parent)
- kref_put(&parent->ref, mdev_release_parent);
-}
-
/* Caller must hold parent unreg_sem read or write lock */
static void mdev_device_remove_common(struct mdev_device *mdev)
{
@@ -243,12 +229,9 @@ int mdev_device_create(struct mdev_type *type, const guid_t *uuid)
{
int ret;
struct mdev_device *mdev, *tmp;
- struct mdev_parent *parent;
-
- parent = mdev_get_parent(type->parent);
- if (!parent)
- return -EINVAL;
+ struct mdev_parent *parent = type->parent;
+ mdev_get_parent(parent);
mutex_lock(&mdev_list_lock);
/* Check for duplicate */
diff --git a/drivers/vfio/mdev/mdev_private.h b/drivers/vfio/mdev/mdev_private.h
index debf27f95b4f10..10eccc35782c4d 100644
--- a/drivers/vfio/mdev/mdev_private.h
+++ b/drivers/vfio/mdev/mdev_private.h
@@ -46,4 +46,16 @@ void mdev_remove_sysfs_files(struct mdev_device *mdev);
int mdev_device_create(struct mdev_type *kobj, const guid_t *uuid);
int mdev_device_remove(struct mdev_device *dev);
+void mdev_release_parent(struct kref *kref);
+
+static inline void mdev_get_parent(struct mdev_parent *parent)
+{
+ kref_get(&parent->ref);
+}
+
+static inline void mdev_put_parent(struct mdev_parent *parent)
+{
+ kref_put(&parent->ref, mdev_release_parent);
+}
+
#endif /* MDEV_PRIVATE_H */
--
2.31.1
