linux-kernel - Re: [RFT PATCH v3] PCI: move pci_read_bridge

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Message-ID: <55B1ABA9.90207@roeck-us.net>
Date:	Thu, 23 Jul 2015 20:06:17 -0700
From:	Guenter Roeck <linux@...ck-us.net>
To:	Lorenzo Pieralisi <lorenzo.pieralisi@....com>
CC:	Bjorn Helgaas <bhelgaas@...gle.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	Ralf Baechle <ralf@...ux-mips.org>,
	"James E.J. Bottomley" <jejb@...isc-linux.org>,
	Michael Ellerman <mpe@...erman.id.au>,
	Richard Henderson <rth@...ddle.net>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	David Howells <dhowells@...hat.com>,
	Russell King <linux@....linux.org.uk>,
	Tony Luck <tony.luck@...el.com>,
	"David S. Miller" <davem@...emloft.net>,
	Ingo Molnar <mingo@...hat.com>,
	Michal Simek <monstr@...str.eu>,
	Chris Zankel <chris@...kel.net>, Arnd Bergmann <arnd@...db.de>,
	Krzysztof Halasa <khalasa@...p.pl>,
	Phil Edworthy <phil.edworthy@...esas.com>,
	Jason Gunthorpe <jgunthorpe@...idianresearch.com>,
	Jingoo Han <jg1.han@...sung.com>,
	Lucas Stach <l.stach@...gutronix.de>,
	Simon Horman <horms@...ge.net.au>,
	Minghuan Lian <minghuan.Lian@...escale.com>,
	Murali Karicheri <m-karicheri2@...com>,
	Tanmay Inamdar <tinamdar@....com>,
	Kishon Vijay Abraham I <kishon@...com>,
	Thierry Reding <thierry.reding@...il.com>,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	Will Deacon <Will.Deacon@....com>,
	Jayachandran C <jchandra@...adcom.com>,
	"suravee.suthikulpanit@....com" <suravee.suthikulpanit@....com>
Subject: Re: [RFT PATCH v3] PCI: move pci_read_bridge_bases to the generic
 PCI layer

On 07/23/2015 10:52 AM, Lorenzo Pieralisi wrote:
>>
>> For alpha, PCI_PROBE_ONLY is set for two platforms, marvel and titan,
>> out of ~20. mips sets the flag for 6 platforms out of >25.
>> Unlikely that those are the only relevant ones.
>>
>> I could try to run some qemu tests for both architectures, but I have
>> no idea what to look out for. Ideas, anyone ?
>
> As I replied to Bjorn, I would not expect pci_read_bridge_bases() to
> be a disruptive operation on !PCI_PROBE_ONLY systems, I will check
> again alpha and mips code but it is really hard to say, I will
> inspect the code again to try to figure it out.
>

I finally got around to apply the patch to our system (ppc and x86).
I also applied it on top of Linus' tree and ran it through my test
farm. No problems found, works fine as far as I can see.

Guenter

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