svn commit: r327991 - head/stand/fdt

[Kyle Evans]

On Sun, Jan 14, 2018 at 11:00 PM, Kyle Evans <kevans at freebsd.org> wrote:
> Author: kevans
> Date: Mon Jan 15 05:00:26 2018
> New Revision: 327991
> URL: https://svnweb.freebsd.org/changeset/base/327991
>
> Log:
>   stand/fdt: don't send clobbered FDT to the kernel
>
>   If fdt_overlay_apply fails at some stage to apply the overlay to the base,
>   both the base and overlay may be in an inconsistent state (some fixups
>   applied, some phandles adjusted, some symbols merged). These can be bad for
>   a number of reasons, to include user frustration if some fixups applied and
>   not others. Fail a little safer by making a clean copy of the base FDT for
>   every overlay that we can simply discard if things go awry.
>
>   This also allows us the luxury of simply discarding overlays if we hit some
>   kind of memory limit or if they're malformed and extremely large for some
>   reason. We'll now leave a nice error message indicating that some overlays
>   could not be applied due to size restrictions and we apply what we can.
>
>   I note that our overlay implementation has some flaws that might still leave
>   your system in an unbootable state even if an overlay applies correctly;
>   please exercise caution in using overlays until we can swap it out for
>   libfdt's implementation.
>
>   Tested on:    BananaPi-M3 (armv7)
>   Tested on:    Pine64 (aarch64)
>   Differential Revision:        https://reviews.freebsd.org/D13709
>

I seem to have droppped this:

MFC after: 1 week