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vfio/mdev: Expose mdev_get/put_parent to mdev_private.h

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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@lst.de>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Message-Id: <6-v2-d36939638fc6+d54-vfio2_jgg@nvidia.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Jason Gunthorpe 2021-04-06 16:40:29 -03:00 committed by Alex Williamson
parent 417fd5bf24
commit a9f8111d0b
2 changed files with 15 additions and 20 deletions
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23
drivers/vfio/mdev/mdev_core.c
View file

@ -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 */

12
drivers/vfio/mdev/mdev_private.h
View file

@ -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 */