hv: convert mshv_ioctl_create_partition() to FD_ADD()

Link: https://patch.msgid.link/20251123-work-fd-prepare-v4-39-b6efa1706cfd@kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>

Author: brauner

drivers/hv/mshv_root_main.c

@@ -1870,8 +1870,6 @@ mshv_ioctl_create_partition(void __user *user_arg, struct device *module_dev)
 	struct hv_partition_creation_properties creation_properties = {};
 	union hv_partition_isolation_properties isolation_properties = {};
 	struct mshv_partition *partition;
-	struct file *file;
-	int fd;
 	long ret;
 
 	if (copy_from_user(&args, user_arg, sizeof(args)))
@@ -1938,29 +1936,13 @@ mshv_ioctl_create_partition(void __user *user_arg, struct device *module_dev)
 		goto delete_partition;
 
 	ret = mshv_init_async_handler(partition);
-	if (ret)
-		goto remove_partition;
-
-	fd = get_unused_fd_flags(O_CLOEXEC);
-	if (fd < 0) {
-		ret = fd;
-		goto remove_partition;
-	}
-
-	file = anon_inode_getfile("mshv_partition", &mshv_partition_fops,
-				  partition, O_RDWR);
-	if (IS_ERR(file)) {
-		ret = PTR_ERR(file);
-		goto put_fd;
+	if (!ret) {
+		ret = FD_ADD(O_CLOEXEC, anon_inode_getfile("mshv_partition",
+							   &mshv_partition_fops,
+							   partition, O_RDWR));
+		if (ret >= 0)
+			return ret;
 	}
-
-	fd_install(fd, file);
-
-	return fd;
-
-put_fd:
-	put_unused_fd(fd);
-remove_partition:
 	remove_partition(partition);
 delete_partition:
 	hv_call_delete_partition(partition->pt_id);