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From: Christoph Hellwig <hch@lst.de>
Subject: Re: [PATCH 02/10] ARM: disable CONFIG_IDE in footbridge_defconfig
Date: Mon, 22 Mar 2021 16:18:23 +0100
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To: Russell King - ARM Linux admin <linux@armlinux.org.uk>
Cc: Jens Axboe <axboe@kernel.dk>, Thomas Bogendoerfer <tsbogend@alpha.franken.de>, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, "David S. Miller" <davem@davemloft.net>, linux-ide@vger.kernel.org, linux-m68k@lists.linux-m68k.org, Ivan Kokshaysky <ink@jurassic.park.msu.ru>, linux-alpha@vger.kernel.org, Geert Uytterhoeven <geert@linux-m68k.org>, Matt Turner <mattst88@gmail.com>, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, Christoph Hellwig <hch@lst.de>, linux-arm-kernel@lists.infradead.org, Richard Henderson <rth@twiddle.net>

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?