[Bug 235016] ASIX AX99100 based uart controllers broken on 12.0

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=235016

david at dcrosstech.com changed:

           What    |Removed                     |Added
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                 CC|                            |david at dcrosstech.com

--- Comment #1 from david at dcrosstech.com ---
I have this problem too (12.2); I did a diff between the 11.2 and 12.0 branches
and I noticed that 12.0 introduced MSI interrupts for all drivers in this
class, I commented that out via an #if 0  and recompiled and ran, and
everything works currently.

I loaded the design specs for this and confirmed this does support MSI, so I
don't think this is a long term solution.  I do have a spare one of these cards
(I think it is the same chip), and some kernel development experience, but none
with PCIe..  I am willing and able to work on the correct solution, I will just
need some guidance.

(I will first experiment with removing the limit on the number of MSI
interrupts)

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