[FS#821] sysupgrade doesn't work on Linksys WRT3200ACM (mvebu)

[LEDE Bugs]

The following task has a new comment added:

FS#821 - sysupgrade doesn't work on Linksys WRT3200ACM (mvebu)
User who did this - Hannu Nyman (hnyman)

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I have narrowed down the regression range:

r4249-393817df5d sysupgrade from this ok
r4252-218af1957e sysupgrade from this fails

So, one of these commits makes mvebu wrt3200acm to fail in sysupgrade:

218af1957e fstools: snapshot: handle jffs2 conversion using upgraded
6bbb3a2b0a fstools: clean up trailing whitespace in snapshot script
30f61a34b4 base-files: always use staged sysupgrade

Of these, 30f61a34b4 looks most likely at the first glance.

I reverted the changes done by 30f61a34b4 manually.
That enabled again the sysupgrade from my r4252-218af1957e build.

So, it looks like the reason for the broken mvebu wrt3200acm sysupgrade is
30f61a34b4 base-files: always use staged sysupgrade

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Work-around advice for mvebu users to enable sysupgrades:


cd /tmp
wget https://github.com/lede-project/source/commit/30f61a34b4cfd2c676fea4a919e089d6a77254e9.patch
cd /
patch -R -p 4 -i /tmp/30f61a34b4cfd2c676fea4a919e089d6a77254e9.patch


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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=821#comment2717