linux-kernel - Re: [PATCH 5/5] pcmcia: add a new resource manager for non ISA systems

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Message-ID: <20150530144055.GA10043@light.dominikbrodowski.net>
Date:	Sat, 30 May 2015 16:40:55 +0200
From:	Dominik Brodowski <linux@...inikbrodowski.net>
To:	Alan Cox <alan@...ux.intel.com>
Cc:	linux-kernel@...r.kernel.org, linux-pcmica@...ts.infradead.org
Subject: Re: [PATCH 5/5] pcmcia: add a new resource manager for non ISA
 systems

Alan,

On Thu, Dec 04, 2014 at 09:31:22PM +0000, Alan Cox wrote:
> On a pure PCI platform we don't actually need all the complexity of the
> rsrc_nonstatic manager, in fact we can just work directly with the pci
> allocators and avoid all the complexity (and code bloat).

I know you're re-working this thing by now, but still:

Can we be certain that BIOS, ACPI etc. properly report all io resources
which must not be utilized by other devices? Does this really depend on ISA
being set in Kconfig? Should this also be enabled for CardBus bridges on the
root PCI bus? And: could doing a check for X86 like in rsrc_nonstatic.c
( avoid anything < 0x100 for ioports ) help to avoid some of the possible
fallout?

Best,

	Dominik

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