btrfs: qgroup: Drop fs_info parameter from btrfs_del_qgroup_relation

It can be fetched from the transaction handle.
Signed-off-by: Lu Fengqi <lufq.fnst@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/ioctl.c

@@ -5173,8 +5173,7 @@ static long btrfs_ioctl_qgroup_assign(struct file *file, void __user *arg)
 	if (sa->assign) {
 		ret = btrfs_add_qgroup_relation(trans, sa->src, sa->dst);
 	} else {
-		ret = btrfs_del_qgroup_relation(trans, fs_info,
-						sa->src, sa->dst);
+		ret = btrfs_del_qgroup_relation(trans, sa->src, sa->dst);
 	}
 
 	/* update qgroup status and info */

fs/btrfs/qgroup.c

@@ -1351,9 +1351,10 @@ static int __del_qgroup_relation(struct btrfs_trans_handle *trans, u64 src,
 	return ret;
 }
 
-int btrfs_del_qgroup_relation(struct btrfs_trans_handle *trans,
-			      struct btrfs_fs_info *fs_info, u64 src, u64 dst)
+int btrfs_del_qgroup_relation(struct btrfs_trans_handle *trans, u64 src,
+			      u64 dst)
 {
+	struct btrfs_fs_info *fs_info = trans->fs_info;
 	int ret = 0;
 
 	mutex_lock(&fs_info->qgroup_ioctl_lock);

fs/btrfs/qgroup.h

@@ -149,8 +149,8 @@ int btrfs_qgroup_wait_for_completion(struct btrfs_fs_info *fs_info,
 				     bool interruptible);
 int btrfs_add_qgroup_relation(struct btrfs_trans_handle *trans, u64 src,
 			      u64 dst);
-int btrfs_del_qgroup_relation(struct btrfs_trans_handle *trans,
-			      struct btrfs_fs_info *fs_info, u64 src, u64 dst);
+int btrfs_del_qgroup_relation(struct btrfs_trans_handle *trans, u64 src,
+			      u64 dst);
 int btrfs_create_qgroup(struct btrfs_trans_handle *trans,
 			struct btrfs_fs_info *fs_info, u64 qgroupid);
 int btrfs_remove_qgroup(struct btrfs_trans_handle *trans,