From 9621e7224a155caa5c8ebfeed92d1bef1923e33d Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Mar 16 2021 04:19:35 +0000
Subject: 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

---

diff --git a/src/cryptsetup/cryptsetup.c b/src/cryptsetup/cryptsetup.c
index 0881aea..f2b2557 100644
--- a/src/cryptsetup/cryptsetup.c
+++ b/src/cryptsetup/cryptsetup.c
@@ -455,7 +455,7 @@ static int attach_tcrypt(
                 r = read_one_line_file(key_file, &passphrase);
                 if (r < 0) {
                         log_error_errno(r, "Failed to read password file '%s': %m", key_file);
-                        return -EAGAIN;
+                        return -EAGAIN; /* log with the actual error, but return EAGAIN */
                 }
 
                 params.passphrase = passphrase;