linux-kernel - Re: [PATCH] PCI: Clear bridge MEM_64 flag if one child does not support it

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Date:	Tue, 9 Dec 2014 13:39:32 -0800
From:	Yinghai Lu <yinghai@...nel.org>
To:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc:	Bjorn Helgaas <bhelgaas@...gle.com>,
	Gavin Shan <gwshan@...ux.vnet.ibm.com>,
	Marek Kordík <kordikmarek@...il.com>,
	Alexey Voronkov <zermond@...il.com>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] PCI: Clear bridge MEM_64 flag if one child does not
 support it

On Mon, Dec 8, 2014 at 4:09 PM, Yinghai Lu <yinghai@...nel.org> wrote:
> On Mon, Dec 8, 2014 at 3:00 PM, Benjamin Herrenschmidt
> <benh@...nel.crashing.org> wrote:
>
>>
>> I think an option would be to keep track of whether the PCI host bridge
>> can do 64-bit pref above 4G.
>
> Yes, that could be enhancement.
>
> That should fix the problem Marek's
>
> But not on Zermond's, as his system is not using _CRS.
>

http://patchwork.ozlabs.org/patch/419295/

PCI: Clear all bridge res MEM_64 if host bridge has non mem64
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