Ticket #11464 (closed defect: fixed)
XO-1.75 EC write protected while SPI FLASH writable
|Reported by:||Quozl||Owned by:||Quozl|
|Component:||ofw - open firmware||Version:||1.75/1.5/1.0 Software Build os883 aka 11.3.0|
|Action Needed:||no action||Verified:||no|
|Deployments affected:||Blocked By:|
Description (last modified by Quozl) (diff)
Occasionally a unit has a write protected EC even though the SPI FLASH is not write protected. The condition persists until battery and external power are removed.
The symptom up to Q4C04, but not Q4B10, is invisible.
From Q4C05 the symptom will be successful flash but additional warnings:
Checking integrity Write Protected EC SPI FLASH is type 34 - Macronyx ...
An early step in flash is try to hold the EC in reset. This feature (#11215) was introduced in Q4B10, but broke in Q4B11, and will be reintroduced in Q4C05. This depends on the security flip-flop not being triggered by protect-fw, which in turn depends on the wp tag not being present.
Seen on two B1s in the past few days.