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Re: Have my PA8800 back online...

On 07.12.2017 19:45, Frank Scheiner wrote:
> On 12/04/2017 03:54 PM, Helge Deller wrote:
> According to `lspci` the 16450 (or fourth 16550A) is from a "HP Auxiliary Diva Serial Port":

> root@rp3440:~# lspci -nn
> [...]
> e0:01.0 Communication controller [0780]: Hewlett-Packard Company Auxiliary Diva Serial Port [103c:1290] (rev 01)
> e0:01.1 Serial controller [0700]: Hewlett-Packard Company Diva Serial [GSP] Multiport UART [103c:1048] (rev 03)
> Interesting - actually the current situation looks like what [your patch from May 29th] should have accomplished. But as you dropped it in favor of a patch to palo, it seems to be unrelated.
> [your patch from May 29th]: https://patchwork.kernel.org/patch/9753613/

The patch had some other issues which is why I dropped it.
I like the testing of the class id much more, as it's done by the current upstream code. 
E.g. this diva port reports PCI_CLASS_COMMUNICATION_OTHER as PCI CLASS ID, which differs to what the serial port driver should handle.

> In addition the Diva port in my rp3440 seems to have a different PCI ID (0x1290 instead of 0x1291) than what you expected for a rp3410 in your patch. Do both machines differ that much or could it be due to a different firmware level maybe?

We have the same IDs.
Do not mix up "PCI device ID" and "PCI subdevice/subsystem ID".

Check with "lspci -vn":
e0:01.0 0780: 103c:1290 (rev 01)
        Subsystem: 103c:1291


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