On Mon, Mar 22, 2021 at 04:18:23PM +0100, Christoph Hellwig wrote:
On Mon, Mar 22, 2021 at 03:15:03PM +0000, Russell King - ARM Linux admin wrote:
It gets worse than that though - due to a change to remove
pcibios_min_io from the generic code, moving it into the ARM
architecture code, this has caused a regression that prevents the
legacy resources being registered against the bus resource. So even
if they are there, they cause probe failures. I haven't found a
reasonable way to solve this yet, but until there is, there is no
way that the PATA driver can be used as the "legacy mode" support
is effectively done via the PCI code assigning virtual IO port
resources.
I'm quite surprised that the CY82C693 even works on Alpha - I've
asked for a lspci for that last week but nothing has yet been
forthcoming from whoever responded to your patch for Alpha - so I
can't compare what I'm seeing with what's happening with Alpha.
That sounds like something we could fix with a quirk for function 2
in the PCI resource assignment code. Can you show what vendor and
device ID function 2 has so that I could try to come up with one?
I already have a quirk in arch/arm/kernel/bios32.c for this - but it
is no longer sufficient due to changes in the PCI layer, where much
of this is documented.
--
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
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