[PATCH v2 14/15] vfio: Rename vfio_device_put() and vfio_device_try_get()

Kevin Tian
2022-09-01T07:22:45Z

With the addition of vfio_put_device() now the names become confusing.

vfio_put_device() is clear from object life cycle p.o.v given kref.

vfio_device_put()/vfio_device_try_get() are helpers for tracking
users on a registered device.

Now rename them:

- vfio_device_put() -> vfio_device_put_registration()
- vfio_device_try_get() -> vfio_device_try_get_registration()

Signed-off-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
---
drivers/vfio/vfio_main.c | 17 +++++++++--------
1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/drivers/vfio/vfio_main.c b/drivers/vfio/vfio_main.c
index 957d9f286550..bfa675d314ab 100644
--- a/drivers/vfio/vfio_main.c
+++ b/drivers/vfio/vfio_main.c
@@ -451,13 +451,13 @@ 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)
+static void vfio_device_put_registration(struct vfio_device *device)
{
if (refcount_dec_and_test(&device->refcount))
complete(&device->comp);
}

-static bool vfio_device_try_get(struct vfio_device *device)
+static bool vfio_device_try_get_registration(struct vfio_device *device)
{
return refcount_inc_not_zero(&device->refcount);
}
@@ -469,7 +469,8 @@ static struct vfio_device *vfio_group_get_device(struct vfio_group *group,

mutex_lock(&group->device_lock);
list_for_each_entry(device, &group->device_list, group_next) {
- if (device->dev == dev && vfio_device_try_get(device)) {
+ if (device->dev == dev &&
+ vfio_device_try_get_registration(device)) {
mutex_unlock(&group->device_lock);
return device;
}
@@ -671,7 +672,7 @@ static int __vfio_register_dev(struct vfio_device *device,
if (existing_device) {
dev_WARN(device->dev, "Device already exists on group %d\n",
iommu_group_id(group->iommu_group));
- vfio_device_put(existing_device);
+ vfio_device_put_registration(existing_device);
if (group->type == VFIO_NO_IOMMU ||
group->type == VFIO_EMULATED_IOMMU)
iommu_group_remove_device(device->dev);
@@ -730,7 +731,7 @@ static struct vfio_device *vfio_device_get_from_name(struct vfio_group *group,
ret = !strcmp(dev_name(it->dev), buf);
}

- if (ret && vfio_device_try_get(it)) {
+ if (ret && vfio_device_try_get_registration(it)) {
device = it;
break;
}
@@ -750,7 +751,7 @@ void vfio_unregister_group_dev(struct vfio_device *device)
bool interrupted = false;
long rc;

- vfio_device_put(device);
+ vfio_device_put_registration(device);
rc = try_wait_for_completion(&device->comp);
while (rc <= 0) {
if (device->ops->request)
@@ -1286,7 +1287,7 @@ static int vfio_group_get_device_fd(struct vfio_group *group, char *buf)
err_put_fdno:
put_unused_fd(fdno);
err_put_device:
- vfio_device_put(device);
+ vfio_device_put_registration(device);
return ret;
}

@@ -1461,7 +1462,7 @@ static int vfio_device_fops_release(struct inode *inode, struct file *filep)

vfio_device_unassign_container(device);

- vfio_device_put(device);
+ vfio_device_put_registration(device);

return 0;
}
--
2.21.3