r336921 broke booting on MBP 2017, EFIRT related

[Rainer Hurling]

Am 31.08.18 um 10:27 schrieb Konstantin Belousov:
> On Thu, Aug 30, 2018 at 10:12:33PM +0300, Konstantin Belousov wrote:
>> On Thu, Aug 30, 2018 at 12:22:36PM +0300, Yuri Pankov wrote:
>>> Sorry, I accidentally took the discussion off-list, where Konstantin 
>>> provided some more patches.  I'm attaching the one that finally worked 
>>> for me.  It also adds some diagnostic prints which require bootverbose 
>>> to be enabled.
>>
>> This patch requires some more work to make it committable.
>> Do not try to build it with efirt device in the kernel config,
>> only efirt.ko works, but it can be preloaded from loader.
> 
> A version of the patch which finishes items which I wanted
> to handle, is available both for review and for testing at
> https://reviews.freebsd.org/D16972 .
> 

I tried the patches from D16972 and it seems to work on a DELL Latitude
E6520. It now boots with OPTIONS EFIRT and without efi.rt.disabled=1.

Many thanks!