tree 15118ac0ea82290254defad9d5a4947e2537034e
parent 435be9873179338d0c4e7b2d823989181a089771
author Randall Spangler <rspangler@chromium.org> 1379701088 -0700
committer chrome-internal-fetch <chrome-internal-fetch@google.com> 1392096634 +0000

Fix jumping EC from RO to RW if disable-jump was called on previous boot

It's possible for the AP to get updated and remove the RO-normal flag
without needing to update EC-RW firmware - for example, if it only
needs to update the BIOS.  In this case, the EC doesn't need update,
but does need to jump to its RW firmware.  But if the EC is already
booted RO-normal with jump disabled, it will refuse that request and
go to recovery mode.

The fix is simply to check if the request to jump to RW requires the
EC to cold-boot first, and pass through that error code to the caller.

BUG=chrome-os-partner:22617
BRANCH=none (affects all platforms, but only in this odd case, and this
       is a change to the RW portion of the code)
TEST=pass new unit test which triggers this condition

Change-Id: Ia8d64dff784a9135ef23f6eb26bbca4ad9df57c3
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/170168
Reviewed-by: Vadim Bendebury <vbendeb@chromium.org>