tree 9a0243ad63928493fcd9bb19a47419b8e1a11727
parent 6d69d502a7560249a619bec56d3a946ec7fe934c
author J. Richard Barnette <jrbarnette@chromium.org> 1329437238 -0800
committer Richard Barnette <jrbarnette@chromium.org> 1329861940 -0800

cros_generate_update_payload: Delete -d options from umount

The -d option to umount is unnecessary in cases where the original
mount was created with '-o loop' (it says so in the man page).
Moreover, there's a demonstrable bug when using 'umount -d' in this
case:  umount complains that it's unable to delete the loop device
in this case.  This change silences those messages.

The demonstrated bug in umount is a plausible explanation for build
failures characterized by unexpected failures of 'mount -o loop';
see the BUG, below.

BUG=chromium-os:24975
TEST=TBD

Change-Id: I8f3b3274ccea3dd5a5b35e880bbe220846061d3a
Reviewed-on: https://gerrit.chromium.org/gerrit/16186
Reviewed-by: David James <davidjames@chromium.org>
Tested-by: Richard Barnette <jrbarnette@chromium.org>