What does てもいいように mean?

Here is the sentence:
ハリーはダドリーの癇癪玉が大爆発寸前なのを感じて、いつテーブルがひっくり返されてもいいように大急ぎでベーコンに食ついた。I know that te mo ii can mean permission/asking for a permission but I don’t get what it is here

by yyouknowwho

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