To increment a reference the caller already holds. Export vfio_device_put() to pair with it.
Signed-off-by: Jason Gunthorpe jgg@nvidia.com --- drivers/vfio/vfio_main.c | 3 ++- include/linux/vfio.h | 6 ++++++ 2 files changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/vfio/vfio_main.c b/drivers/vfio/vfio_main.c index 6f96e6d07a5e98..5ad50aec7dc94c 100644 --- a/drivers/vfio/vfio_main.c +++ b/drivers/vfio/vfio_main.c @@ -451,11 +451,12 @@ static void vfio_group_get(struct vfio_group *group) * Device objects - create, release, get, put, search */ /* Device reference always implies a group reference */ -static void vfio_device_put(struct vfio_device *device) +void vfio_device_put(struct vfio_device *device) { if (refcount_dec_and_test(&device->refcount)) complete(&device->comp); } +EXPORT_SYMBOL_GPL(vfio_device_put);
static bool vfio_device_try_get(struct vfio_device *device) { diff --git a/include/linux/vfio.h b/include/linux/vfio.h index e05ddc6fe6a556..25850b1e08cba9 100644 --- a/include/linux/vfio.h +++ b/include/linux/vfio.h @@ -143,6 +143,12 @@ void vfio_uninit_group_dev(struct vfio_device *device); int vfio_register_group_dev(struct vfio_device *device); int vfio_register_emulated_iommu_dev(struct vfio_device *device); void vfio_unregister_group_dev(struct vfio_device *device); +void vfio_device_put(struct vfio_device *device); + +static inline void vfio_device_get(struct vfio_device *device) +{ + refcount_inc(&device->refcount); +}
int vfio_assign_device_set(struct vfio_device *device, void *set_id);