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From:   Kevin Tian <kevin.tian@intel.com>
To:     Zhenyu Wang <zhenyuw@linux.intel.com>,
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Cc:     Yi Liu <yi.l.liu@intel.com>
Subject: [PATCH v3 14/15] vfio: Rename vfio_device_put() and vfio_device_try_get()
Date:   Fri,  9 Sep 2022 18:22:46 +0800
Message-Id: <20220909102247.67324-15-kevin.tian@intel.com>
In-Reply-To: <20220909102247.67324-1-kevin.tian@intel.com>
References: <20220909102247.67324-1-kevin.tian@intel.com>
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Precedence: bulk

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>
Reviewed-by: Eric Auger <eric.auger@redhat.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 5bc221730d7b..37cbd10f3faf 100644
--- a/drivers/vfio/vfio_main.c
+++ b/drivers/vfio/vfio_main.c
@@ -453,13 +453,13 @@ 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);
 }
@@ -471,7 +471,8 @@ 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;
 		}
@@ -673,7 +674,7 @@ 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);
@@ -731,7 +732,7 @@ 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;
 		}
@@ -751,7 +752,7 @@ 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)
@@ -1311,7 +1312,7 @@ static int vfio_group_ioctl_get_device_fd(struct vfio_group *group,
 err_put_fdno:
 	put_unused_fd(fdno);
 err_put_device:
-	vfio_device_put(device);
+	vfio_device_put_registration(device);
 	return ret;
 }
 
@@ -1493,7 +1494,7 @@ 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