Invoking a read from inside the shell script makes the program freeze

Question

Calling a read from inside a function in a bash shell script causes the script to hang. Can someone explain why this is happening, and how to call read without it? Consider below the MWE.

#!/bin/bash

hangup () {
    read choice < /dev/tty
}

hangup

Thank!

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Edit: The above, of course, works completely. My problem was extracted from a larger program where I set a variable using the command substitution construct. For example,

myvar=$(hangup)

But there was a loop containing a read call inside the function, and the text was redirected to a variable, so it had a kind of hang, even if something happened - I just could not say because there was no way out (in general, no!).

Sorry for the stupid question. If there is a way to close this question, that would be great.