[jkelley on 2018-09-04 14:36:06] : DOMs come back on after firmware fuse trips

dglo / dor-driver

Test upload of Mantis issues

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[jkelley on 2018-09-04 14:36:06] : DOMs come back on after firmware fuse trips #122

Open dglo opened 3 years ago

dglo commented 3 years ago

Odd behavior observed during WO training:

trip firmware fuse on one pair
try to talk to other pair, tripped pair then comes back on (?!)

This was repeatable.

dglo commented 3 years ago

[jkelley on 2019-01-08 21:08:04] Seems to happen in iceboot but not configboot?!?!

dglo commented 3 years ago

[jkelley on 2019-01-09 20:14:03] This is exactly the problem described in issue 1688. The shadow copy of CTRL of the PON bits in the driver is not updated when the firmware fuse blows, so the driver just powers back on when updating any other bits in this register.

The DOR card can send an interrupt on a power check failure, this is probably the way to go as suggested in the old issue. The initial problem with this approach is that IRQs are not requested until a device is actually opened.

dglo commented 3 years ago

[jkelley on 2019-01-10 22:30:42] Fixed in V02-15-03, see issue 1688