linux-kernel - Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Reported regressions from 2.6.24)

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Message-Id: <1206490321.10573.10.camel@pasglop>
Date:	Wed, 26 Mar 2008 11:12:01 +1100
From:	Benjamin Herrenschmidt <benh@...abs.org>
To:	Yinghai Lu <yhlu.kernel@...il.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Stefan Richter <stefanr@...6.in-berlin.de>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ivan Kokshaysky <ink@...assic.park.msu.ru>,
	Thomas Meyer <thomas@...3r.de>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	LKML <linux-kernel@...r.kernel.org>,
	Adrian Bunk <bunk@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Natalie Protasevich <protasnb@...il.com>,
	Myles Watson <mylesgw@...il.com>
Subject: Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Reported
	regressions from 2.6.24)


On Tue, 2008-03-25 at 17:03 -0700, Yinghai Lu wrote:
> >  The good news is that I have done a patch to fix it, which has been
> >  in -mm for about a month:
> iomap-fix-64-bits-resources-on-32-bits.patch
> 
> does it support if size is 4G above, like 256G?

The patch just fixes pci_iomap to use resource_size_t, which fixes bugs
with MMIO addresses/size being cropped. It doesn't fix some limitations
we still, I think, have in the PCI code with 64 bits BARs on 32 bits
platforms (that we could, in fact, probably remove when resource_size_t
is 64 bits but we haven't done it yet, at least as far as I remember).

Ben.


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