linux-kernel - RE: [PATCH v2 1/4] PCI: rcar: remove unused pci_sys

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Date:	Mon, 11 Jan 2016 11:23:37 +0000
From:	Phil Edworthy <phil.edworthy@...esas.com>
To:	Bjorn Helgaas <helgaas@...nel.org>,
	Simon Horman <horms@...ge.net.au>
CC:	Bjorn Helgaas <bhelgaas@...gle.com>,
	Wolfram Sang <wsa@...-dreams.de>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	"linux-sh@...r.kernel.org" <linux-sh@...r.kernel.org>
Subject: RE: [PATCH v2 1/4] PCI: rcar: remove unused pci_sys_data structure in
 pcie-rcar

Hi Bjorn,

On 08 January 2016 21:07, Bjorn Helgaas wrote:
> On Fri, Jan 08, 2016 at 10:50:57AM +0900, Simon Horman wrote:
> > Hi Phil,
> >
> > On Tue, Jan 05, 2016 at 01:00:28PM +0000, Phil Edworthy wrote:
> > > Commit b3a72384fe29 ("ARM/PCI: Replace pci_sys_data->align_resource
> > > with global function pointer") removed the struct pci_sys_data
> > > dependency from the ARM pcibios functions, so remove it from this
> > > driver.
> >
> > I am a little confused by this as I still see two instances of
> > the following in bios32.c as of the commit above.
> >
> > 	struct pci_sys_data *sys = dev->sysdata;
> 
> This patch only removes a pci_sys_data struct from pcie-rcar.c.  That
> struct was previously used by pci_common_init_dev() and by the ARM
> pcibios_align_resource().
> 
> After cbce7900598c ("PCI: designware: Make driver arch-agnostic"), none of
> the DesignWare drivers use pci_common_init_dev(), and after b3a72384fe29,
> ARM doesn't need pci_sys_data for pcibios_align_resource().
> 
> Phil can correct me if I'm wrong, but I think this patch is probably OK.
You are absolutely right!

> I guess we can tell after I apply it and get a build test :)
Yes, it has been built and run on both ARM and ARM64 boards.

Thanks
Phil