linux-kernel - Re: [PATCH v2 03/30] xen/PCI: Don't use deprecated function pci_scan_bus

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Message-ID: <20150122202523.GC5813@l.oracle.com>
Date:	Thu, 22 Jan 2015 15:25:23 -0500
From:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
To:	Yijing Wang <wangyijing@...wei.com>
Cc:	Bjorn Helgaas <bhelgaas@...gle.com>,
	Jiang Liu <jiang.liu@...ux.intel.com>,
	linux-pci@...r.kernel.org, Yinghai Lu <yinghai@...nel.org>,
	linux-kernel@...r.kernel.org, Marc Zyngier <marc.zyngier@....com>,
	linux-arm-kernel@...ts.infradead.org,
	Russell King <linux@....linux.org.uk>, x86@...nel.org,
	Thomas Gleixner <tglx@...utronix.de>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Tony Luck <tony.luck@...el.com>, linux-ia64@...r.kernel.org,
	"David S. Miller" <davem@...emloft.net>,
	Guan Xuetao <gxt@...c.pku.edu.cn>, linux-alpha@...r.kernel.org,
	linux-m68k@...r.kernel.org, Liviu Dudau <liviu@...au.co.uk>,
	Arnd Bergmann <arnd@...db.de>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	xen-devel@...ts.xenproject.org
Subject: Re: [PATCH v2 03/30] xen/PCI: Don't use deprecated function
 pci_scan_bus_parented()

On Wed, Jan 21, 2015 at 08:29:58AM +0800, Yijing Wang wrote:
> From: Arnd Bergmann <arnd@...db.de>
> 
> Use pci_scan_root_bus() instead of deprecated function
> pci_scan_bus_parented().
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> Signed-off-by: Yijing Wang <wangyijing@...wei.com>
> CC: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
> CC: xen-devel@...ts.xenproject.org

It looks OK to me thought I need to test it first.
> ---
>  drivers/pci/xen-pcifront.c |   10 +++++++---
>  1 files changed, 7 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/pci/xen-pcifront.c b/drivers/pci/xen-pcifront.c
> index b1ffebe..240ddbc 100644
> --- a/drivers/pci/xen-pcifront.c
> +++ b/drivers/pci/xen-pcifront.c
> @@ -446,6 +446,7 @@ static int pcifront_scan_root(struct pcifront_device *pdev,
>  				 unsigned int domain, unsigned int bus)
>  {
>  	struct pci_bus *b;
> +	LIST_HEAD(resources);
>  	struct pcifront_sd *sd = NULL;
>  	struct pci_bus_entry *bus_entry = NULL;
>  	int err = 0;
> @@ -470,17 +471,20 @@ static int pcifront_scan_root(struct pcifront_device *pdev,
>  		err = -ENOMEM;
>  		goto err_out;
>  	}
> +	pci_add_resource(&resources, &ioport_resource);
> +	pci_add_resource(&resources, &iomem_resource);
>  	pcifront_init_sd(sd, domain, bus, pdev);
>  
>  	pci_lock_rescan_remove();
>  
> -	b = pci_scan_bus_parented(&pdev->xdev->dev, bus,
> -				  &pcifront_bus_ops, sd);
> +	b = pci_scan_root_bus(&pdev->xdev->dev, bus,
> +				  &pcifront_bus_ops, sd, &resources);
>  	if (!b) {
>  		dev_err(&pdev->xdev->dev,
>  			"Error creating PCI Frontend Bus!\n");
>  		err = -ENOMEM;
>  		pci_unlock_rescan_remove();
> +		pci_free_resource_list(&resources);
>  		goto err_out;
>  	}
>  
> @@ -488,7 +492,7 @@ static int pcifront_scan_root(struct pcifront_device *pdev,
>  
>  	list_add(&bus_entry->list, &pdev->root_buses);
>  
> -	/* pci_scan_bus_parented skips devices which do not have a have
> +	/* pci_scan_root_bus skips devices which do not have a have
>  	* devfn==0. The pcifront_scan_bus enumerates all devfn. */
>  	err = pcifront_scan_bus(pdev, domain, bus, b);
>  
> -- 
> 1.7.1
> 
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