tree 584ec14c0ee1206988c709510db63ac85a95ad34
parent a632e7f8552e8d26f8b59bc33e8c612e87e809ae
author Kelvin Zhang <zhangkelvin@google.com> 1612832277 -0500
committer Kelvin Zhang <zhangkelvin@google.com> 1613088368 -0500

Prevent SPL downgrade OTAs from generating

Previously we allow all spl downgrade OTA to generate. But applying such
OTA often causes device to hang and rollback, because keymaster refuses
to attach if it detects spl downgrade. When such error happens, it's
really hard to debug. So instead of debugging a mysterious boot failure,
let''s prevent such OTA from generating in the first place.

Test: th
Bug: 178584781

Change-Id: I8e271862d804e86b16aea70424b4d3e289d43cc9