Messages in this thread | | | Date | Sat, 19 May 2018 00:28:57 +0300 | From | Heikki Krogerus <> | Subject | Re: `ucsi_acpi: probe of USBC000:00 failed with error -12` on Dell XPS 13 9360/9370 |
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On Fri, May 18, 2018 at 10:04:02PM +0200, Rafael J. Wysocki wrote: > On Fri, May 18, 2018 at 5:15 PM, Greg Kroah-Hartman > > Given that Windows works with this same set of ACPI tables, perhaps the > > requirement isn't that this memory location be uncached? > > > > We shouldn't have to fix up ACPI tables just for Linux, we've been down > > that path before :( > > Yes, pretty much.
That's not what I'm suggesting. AFAIK these Dell laptops are the only ones with this problem, so if we accept this, I fear it means we have to start maintaining DMI quirk table in the driver, and then:
if (dell) ioremap_cache() else ioremap_nocache()
I was really hoping we could avoid that. Or is there something else we can do in the driver?
I have no idea how the windows driver works, so I will double check and test this next week, but our driver has really worked fine so far.
Thanks,
-- heikki
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