Re: [PATCH 2/2] Convert smsc911x to use ACPI as well as DT

On Wed, Sep 23, 2015 at 06:57:03PM +0100, Sudeep Holla wrote:

On 23/09/15 18:22, Jeremy Linton wrote:

quoted

|FWIW, mainline booting with this patch on Juno r1 with ACPI enabled
dies a |horrible death:

Sorry about the delay, I didn't see this message.

<trimmed>

|How did you get this to work? Firmware release?

Yes, it's a firmware problem with the ACPI tables. It is likely you
need _DSD changes for the SMSC. If your trying to run juno with ACPI
there are a few other ACPI table changes you will need beyond what
was in the last linaro release. I wanted to just provide a direct
link to the correct firmware in this response, but it seems the
required version is sort of up in the air at the moment. Be assured I
will really push on this next week, and will provide a follow up
here.

Originally, the lack of DSD wasn't a problem, but as this patch
evolved  the fact that it consolidates a number of configuration code
paths balancing that got tricky, and ACPI machines with "bad" tables
were the victims (rather than breaking something I can't control).

Even now absence of _DSD *should* continue to be just fine. We can
bailout without initializing the device. Pulling the entire kernel down
just because of an incomplete device entry make no sense IMO.

I agree. IMO, that's a regression since a working kernel on Juno (albeit
without networking) now dies unless you also upgrade the firmware.

-- 
Catalin