[PATCH v1 17/18] vfio: Export vfio_device_try_get()

Eric Farman
2022-06-02T17:20:22Z

From: Jason Gunthorpe <jgg@nvidia.com>

vfio_ccw will need it.

Cc: Alex Williamson <alex.williamson@redhat.com>
Cc: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/9-v3-57c1502c62fd+2190-ccw_mdev_jgg@nvidia.com/
[farman: added Cc: tags]
Signed-off-by: Eric Farman <farman@linux.ibm.com>
---
drivers/vfio/vfio.c | 3 ++-
include/linux/vfio.h | 1 +
2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/vfio/vfio.c b/drivers/vfio/vfio.c
index a4555014bd1e..a1f5904b5ea3 100644
--- a/drivers/vfio/vfio.c
+++ b/drivers/vfio/vfio.c
@@ -499,10 +499,11 @@ void vfio_device_put(struct vfio_device *device)
}
EXPORT_SYMBOL_GPL(vfio_device_put);

-static bool vfio_device_try_get(struct vfio_device *device)
+bool vfio_device_try_get(struct vfio_device *device)
{
return refcount_inc_not_zero(&device->refcount);
}
+EXPORT_SYMBOL_GPL(vfio_device_try_get);

static struct vfio_device *vfio_group_get_device(struct vfio_group *group,
struct device *dev)
diff --git a/include/linux/vfio.h b/include/linux/vfio.h
index 66dda06ec42d..bcd6eaaea9a5 100644
--- a/include/linux/vfio.h
+++ b/include/linux/vfio.h
@@ -126,6 +126,7 @@ 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);
extern struct vfio_device *vfio_device_get_from_dev(struct device *dev);
+bool vfio_device_try_get(struct vfio_device *device);
extern void vfio_device_put(struct vfio_device *device);

int vfio_assign_device_set(struct vfio_device *device, void *set_id);
--
2.32.0