how to find the dired-buffer which initiated the current tags search?

[oliver]

in dired i can mark a bunch of (source) files and then do a full text search 
through them via dired-do-search.

this initiates a tags-search. after two or three M-, (tags-loop-continue) i 
might have found what i sought. but now i want to switch back to the dired 
buffer where i "came from".

is there a way or comannd to switch back to the buffer where i started a 
tags-search/dired-do-search?

thanks, olli