cryptsetup: add some commenting about EAGAIN generation
(cherry picked from commit b7a0fead10959b03a1fa642a5ae7aca3a6a3dee9)
Related: #1776408
patch_name: 0303-cryptsetup-add-some-commenting-about-EAGAIN-generati.patch
present_in_specfile: true
location_in_specfile: 303
squash_commits: true