[OpenWrt-Devel] [PATCH V2] Fix for mvebu (WRT1900AC/WRT1200AC/etc) boot counter

[Claudio Leite]

* Rob Mosher (nyt-openwrt at countercultured.net) wrote:
> Auto recovery is enabled when flashing, so if it goes wrong, you can get
> back to your previous image.  Otherwise, I don't think there's a need for it
> as all it does is switch which kernel/root partitions are booted which
> shouldn't ever change unless flashing (famous last words?).

The use case for leaving it on is for somebody without serial console
access who tries something slightly risky and breaks the active image.
Say, an image that gets far enough to get to mtd resetbc and set
auto_recovery to off, but not actually work (no network, etc.) There are
also enough cases of people messing up their active images on the
WRT1900AC forum thread, one way or another.

If auto_recovery were kept on, they could then use that trick posted
in the wiki ("Stock Firmware Recovery") to manually trigger the
auto recovery to flip back to the other image. (that of course assumes
the other firmware works, but again, this isn't a great recovery
mechanism...)

I tested a build with this patch but auto_recovery kept to "on" and it
works as expected after many reboots. I also manually triggered the
auto_recovery flip, which also worked as expected. So, it seems like it
doesn't really cost anything to keep it on (not yet, at least) while
providing a fringe benefit.

-Claudio
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