Meaning of いいだけの話だ


Sentence:

叩き潰せばいいだけの話だ。

From my understanding, this sentence is composed of:

叩き潰せば - conditional form of 叩き潰す

いい - Good

So I think that 叩き潰せば + いい would translate to something along the lines of:
_would be good/nice if you smash it up/defeat it_

But my main problem is with the second half, だけの話だ.

だけ - only

話 - talk

だけの話 - _only talk?_

I can't provide more context to this sentence since I found it as an example
of the usage of 叩き潰す, but can someone explain to me the meaning of だけの話だ?




The free translation would be "It's easy for us to defeat him completely".
だけの話 is translated as "It's a mere thing" and 話 here has nothing to do with
talk. It describes an event instead.

