[PATCH] dpkg-base: Warn about unmounting problems

[Baurzhan Ismagulov <ibr@radix50.net>]

From: Baurzhan Ismagulov <ibr@ilbers.de>

If a problem occurs, log umount's error messages and warn the user about
retrying.

Signed-off-by: Baurzhan Ismagulov <ibr@ilbers.de>
---
 meta/classes/dpkg-base.bbclass | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/meta/classes/dpkg-base.bbclass b/meta/classes/dpkg-base.bbclass
index 2e8a0d1..42eca62 100644
--- a/meta/classes/dpkg-base.bbclass
+++ b/meta/classes/dpkg-base.bbclass
@@ -1,5 +1,6 @@
 # This software is a part of ISAR.
 # Copyright (C) 2017-2019 Siemens AG
+# Copyright (C) 2019 ilbers GmbH
 #
 # SPDX-License-Identifier: MIT
 
@@ -78,8 +79,9 @@ dpkg_do_mounts() {
 }
 
 dpkg_undo_mounts() {
-    while ! sudo umount ${BUILDROOT} 2>/dev/null; do
-        sleep 0.1
+    while ! sudo umount ${BUILDROOT}; do
+        bbwarn "${BUILDROOT}: Couldn't unmount, retrying..."
+        sleep 1
     done
     sudo rmdir ${BUILDROOT}
 }
-- 
2.20.1