Subject: [PATCH v9 03/30] PCI: Save domain in pci_host_bridge

From: [email-masked] (Gregory CLEMENT)
Date: Wed, 08 Apr 2015 10:09:44 +0200

Hi Yijing,

On 03/04/2015 11:25, Yijing Wang wrote:
> Save domain in pci_host_bridge, so we could get domain
> from pci_host_bridge, and at the end of series, we could
> clean up the arch specific pci_domain_nr(). For arm,
> we pass -1 as the domain number, we would update the
> domain number in core by pci_bus_assign_domain_nr().
> 
For the mvebu part I tested on Armada XP, Armada 375 and Armada 38x
SoCs, and I didn't saw any regression. So you can add my:

Tested-by: Gregory CLEMENT <[email-masked]>

Thanks,

Gregory

> Signed-off-by: Yijing Wang <[email-masked]>
> ---
>  arch/alpha/kernel/pci.c            |    4 ++--
>  arch/alpha/kernel/sys_nautilus.c   |    2 +-
>  arch/arm/kernel/bios32.c           |    2 +-
>  arch/arm/mach-dove/pcie.c          |    2 +-
>  arch/arm/mach-iop13xx/pci.c        |    4 ++--
>  arch/arm/mach-mv78xx0/pcie.c       |    2 +-
>  arch/arm/mach-orion5x/pci.c        |    4 ++--
>  arch/frv/mb93090-mb00/pci-vdk.c    |    3 ++-
>  arch/ia64/pci/pci.c                |    4 ++--
>  arch/ia64/sn/kernel/io_init.c      |    4 ++--
>  arch/m68k/coldfire/pci.c           |    2 +-
>  arch/microblaze/pci/pci-common.c   |    4 ++--
>  arch/mips/pci/pci.c                |    4 ++--
>  arch/mn10300/unit-asb2305/pci.c    |    3 ++-
>  arch/powerpc/kernel/pci-common.c   |    4 ++--
>  arch/s390/pci/pci.c                |    4 ++--
>  arch/sh/drivers/pci/pci.c          |    4 ++--
>  arch/sparc/kernel/leon_pci.c       |    2 +-
>  arch/sparc/kernel/pci.c            |    4 ++--
>  arch/sparc/kernel/pcic.c           |    2 +-
>  arch/tile/kernel/pci.c             |    4 ++--
>  arch/tile/kernel/pci_gx.c          |    4 ++--
>  arch/unicore32/kernel/pci.c        |    2 +-
>  arch/x86/pci/acpi.c                |    4 ++--
>  arch/x86/pci/common.c              |    2 +-
>  arch/xtensa/kernel/pci.c           |    2 +-
>  drivers/parisc/dino.c              |    2 +-
>  drivers/parisc/lba_pci.c           |    2 +-
>  drivers/pci/host/pci-mvebu.c       |    2 +-
>  drivers/pci/host/pci-tegra.c       |    4 ++--
>  drivers/pci/host/pci-versatile.c   |    3 ++-
>  drivers/pci/host/pci-xgene.c       |    2 +-
>  drivers/pci/host/pcie-designware.c |    2 +-
>  drivers/pci/host/pcie-xilinx.c     |    2 +-
>  drivers/pci/hotplug/ibmphp_core.c  |    2 +-
>  drivers/pci/probe.c                |   21 +++++++++++++--------
>  drivers/pci/xen-pcifront.c         |    2 +-
>  include/linux/pci.h                |    8 +++++---
>  38 files changed, 72 insertions(+), 62 deletions(-)
> 
> diff --git a/arch/alpha/kernel/pci.c b/arch/alpha/kernel/pci.c
> index 82f738e..2b0bce9 100644
> --- a/arch/alpha/kernel/pci.c
> +++ b/arch/alpha/kernel/pci.c
> @@ -336,8 +336,8 @@ common_init_pci(void)
>  		pci_add_resource_offset(&resources, hose->mem_space,
>  					hose->mem_space->start);
>  
> -		bus = pci_scan_root_bus(NULL, next_busno, alpha_mv.pci_ops,
> -					hose, &resources);
> +		bus = pci_scan_root_bus(NULL, hose->index, next_busno,
> +				alpha_mv.pci_ops, hose, &resources);
>  		if (!bus)
>  			continue;
>  		hose->bus = bus;
> diff --git a/arch/alpha/kernel/sys_nautilus.c b/arch/alpha/kernel/sys_nautilus.c
> index 700686d..9614e4e 100644
> --- a/arch/alpha/kernel/sys_nautilus.c
> +++ b/arch/alpha/kernel/sys_nautilus.c
> @@ -206,7 +206,7 @@ nautilus_init_pci(void)
>  	unsigned long memtop = max_low_pfn << PAGE_SHIFT;
>  
>  	/* Scan our single hose.  */
> -	bus = pci_scan_bus(0, alpha_mv.pci_ops, hose);
> +	bus = pci_scan_bus(hose->index, 0, alpha_mv.pci_ops, hose);
>  	if (!bus)
>  		return;
>  
> diff --git a/arch/arm/kernel/bios32.c b/arch/arm/kernel/bios32.c
> index ab19b7c..fec2c90 100644
> --- a/arch/arm/kernel/bios32.c
> +++ b/arch/arm/kernel/bios32.c
> @@ -486,7 +486,7 @@ static void pcibios_init_hw(struct device *parent, struct hw_pci *hw,
>  			if (hw->scan)
>  				sys->bus = hw->scan(nr, sys);
>  			else
> -				sys->bus = pci_scan_root_bus(parent, sys->busnr,
> +				sys->bus = pci_scan_root_bus(parent, -1, sys->busnr,
>  						hw->ops, sys, &sys->resources);
>  
>  			if (!sys->bus)
> diff --git a/arch/arm/mach-dove/pcie.c b/arch/arm/mach-dove/pcie.c
> index 91fe971..a379287 100644
> --- a/arch/arm/mach-dove/pcie.c
> +++ b/arch/arm/mach-dove/pcie.c
> @@ -160,7 +160,7 @@ dove_pcie_scan_bus(int nr, struct pci_sys_data *sys)
>  		return NULL;
>  	}
>  
> -	return pci_scan_root_bus(NULL, sys->busnr, &pcie_ops, sys,
> +	return pci_scan_root_bus(NULL, -1, sys->busnr, &pcie_ops, sys,
>  				 &sys->resources);
>  }
>  
> diff --git a/arch/arm/mach-iop13xx/pci.c b/arch/arm/mach-iop13xx/pci.c
> index 9082b84..bc4ba7e 100644
> --- a/arch/arm/mach-iop13xx/pci.c
> +++ b/arch/arm/mach-iop13xx/pci.c
> @@ -535,12 +535,12 @@ struct pci_bus *iop13xx_scan_bus(int nr, struct pci_sys_data *sys)
>  			while(time_before(jiffies, atux_trhfa_timeout))
>  				udelay(100);
>  
> -		bus = pci_bus_atux = pci_scan_root_bus(NULL, sys->busnr,
> +		bus = pci_bus_atux = pci_scan_root_bus(NULL, -1, sys->busnr,
>  						       &iop13xx_atux_ops,
>  						       sys, &sys->resources);
>  		break;
>  	case IOP13XX_INIT_ATU_ATUE:
> -		bus = pci_bus_atue = pci_scan_root_bus(NULL, sys->busnr,
> +		bus = pci_bus_atue = pci_scan_root_bus(NULL, -1, sys->busnr,
>  						       &iop13xx_atue_ops,
>  						       sys, &sys->resources);
>  		break;
> diff --git a/arch/arm/mach-mv78xx0/pcie.c b/arch/arm/mach-mv78xx0/pcie.c
> index 097ea4c..4010a95 100644
> --- a/arch/arm/mach-mv78xx0/pcie.c
> +++ b/arch/arm/mach-mv78xx0/pcie.c
> @@ -202,7 +202,7 @@ mv78xx0_pcie_scan_bus(int nr, struct pci_sys_data *sys)
>  		return NULL;
>  	}
>  
> -	return pci_scan_root_bus(NULL, sys->busnr, &pcie_ops, sys,
> +	return pci_scan_root_bus(NULL, -1, sys->busnr, &pcie_ops, sys,
>  				 &sys->resources);
>  }
>  
> diff --git a/arch/arm/mach-orion5x/pci.c b/arch/arm/mach-orion5x/pci.c
> index b02f394..83898cc 100644
> --- a/arch/arm/mach-orion5x/pci.c
> +++ b/arch/arm/mach-orion5x/pci.c
> @@ -558,11 +558,11 @@ int __init orion5x_pci_sys_setup(int nr, struct pci_sys_data *sys)
>  struct pci_bus __init *orion5x_pci_sys_scan_bus(int nr, struct pci_sys_data *sys)
>  {
>  	if (nr == 0)
> -		return pci_scan_root_bus(NULL, sys->busnr, &pcie_ops, sys,
> +		return pci_scan_root_bus(NULL, -1, sys->busnr, &pcie_ops, sys,
>  					 &sys->resources);
>  
>  	if (nr == 1 && !orion5x_pci_disabled)
> -		return pci_scan_root_bus(NULL, sys->busnr, &pci_ops, sys,
> +		return pci_scan_root_bus(NULL, -1, sys->busnr, &pci_ops, sys,
>  					 &sys->resources);
>  
>  	BUG();
> diff --git a/arch/frv/mb93090-mb00/pci-vdk.c b/arch/frv/mb93090-mb00/pci-vdk.c
> index f211839..719fb75 100644
> --- a/arch/frv/mb93090-mb00/pci-vdk.c
> +++ b/arch/frv/mb93090-mb00/pci-vdk.c
> @@ -384,7 +384,8 @@ int __init pcibios_init(void)
>  	printk("PCI: Probing PCI hardware\n");
>  	pci_add_resource(&resources, &pci_ioport_resource);
>  	pci_add_resource(&resources, &pci_iomem_resource);
> -	bus = pci_scan_root_bus(NULL, 0, pci_root_ops, NULL, &resources);
> +	bus = pci_scan_root_bus(NULL, 0, 0, pci_root_ops, NULL,
> +			&resources);
>  
>  	pcibios_irq_init();
>  	pcibios_fixup_irqs();
> diff --git a/arch/ia64/pci/pci.c b/arch/ia64/pci/pci.c
> index 48cc657..c642bc8 100644
> --- a/arch/ia64/pci/pci.c
> +++ b/arch/ia64/pci/pci.c
> @@ -465,8 +465,8 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
>  	 * should handle the case here, but it appears that IA64 hasn't
>  	 * such quirk. So we just ignore the case now.
>  	 */
> -	pbus = pci_create_root_bus(NULL, bus, &pci_root_ops, controller,
> -				   &info->resources);
> +	pbus = pci_create_root_bus(NULL, domain, bus, &pci_root_ops,
> +			controller, &info->resources);
>  	if (!pbus) {
>  		pci_free_resource_list(&info->resources);
>  		__release_pci_root_info(info);
> diff --git a/arch/ia64/sn/kernel/io_init.c b/arch/ia64/sn/kernel/io_init.c
> index 1be65eb..d528814 100644
> --- a/arch/ia64/sn/kernel/io_init.c
> +++ b/arch/ia64/sn/kernel/io_init.c
> @@ -266,8 +266,8 @@ sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus)
>  	pci_add_resource_offset(&resources,	&res[1],
>  			prom_bussoft_ptr->bs_legacy_mem);
>  
> -	bus = pci_scan_root_bus(NULL, busnum, &pci_root_ops, controller,
> -				&resources);
> +	bus = pci_scan_root_bus(NULL, controller->segment, busnum,
> +			&pci_root_ops, controller, &resources);
>   	if (bus == NULL) {
>  		kfree(res);
>  		kfree(controller);
> diff --git a/arch/m68k/coldfire/pci.c b/arch/m68k/coldfire/pci.c
> index 821de92..63c0c2f 100644
> --- a/arch/m68k/coldfire/pci.c
> +++ b/arch/m68k/coldfire/pci.c
> @@ -312,7 +312,7 @@ static int __init mcf_pci_init(void)
>  	set_current_state(TASK_UNINTERRUPTIBLE);
>  	schedule_timeout(msecs_to_jiffies(200));
>  
> -	rootbus = pci_scan_bus(0, &mcf_pci_ops, NULL);
> +	rootbus = pci_scan_bus(0, 0, &mcf_pci_ops, NULL);
>  	if (!rootbus)
>  		return -ENODEV;
>  
> diff --git a/arch/microblaze/pci/pci-common.c b/arch/microblaze/pci/pci-common.c
> index ae838ed..d232c8a 100644
> --- a/arch/microblaze/pci/pci-common.c
> +++ b/arch/microblaze/pci/pci-common.c
> @@ -1350,8 +1350,8 @@ static void pcibios_scan_phb(struct pci_controller *hose)
>  
>  	pcibios_setup_phb_resources(hose, &resources);
>  
> -	bus = pci_scan_root_bus(hose->parent, hose->first_busno,
> -				hose->ops, hose, &resources);
> +	bus = pci_scan_root_bus(hose->parent, hose->global_number,
> +			hose->first_busno, hose->ops, hose, &resources);
>  	if (bus == NULL) {
>  		pr_err("Failed to create bus for PCI domain %04x\n",
>  		       hose->global_number);
> diff --git a/arch/mips/pci/pci.c b/arch/mips/pci/pci.c
> index 8bb13a4..d6361d5 100644
> --- a/arch/mips/pci/pci.c
> +++ b/arch/mips/pci/pci.c
> @@ -92,8 +92,8 @@ static void pcibios_scanbus(struct pci_controller *hose)
>  	pci_add_resource_offset(&resources,
>  				hose->mem_resource, hose->mem_offset);
>  	pci_add_resource_offset(&resources, hose->io_resource, hose->io_offset);
> -	bus = pci_scan_root_bus(NULL, next_busno, hose->pci_ops, hose,
> -				&resources);
> +	bus = pci_scan_root_bus(NULL, hose->index, next_busno,
> +			hose->pci_ops, hose, &resources);
>  	hose->bus = bus;
>  
>  	need_domain_info = need_domain_info || hose->index;
> diff --git a/arch/mn10300/unit-asb2305/pci.c b/arch/mn10300/unit-asb2305/pci.c
> index 3dfe2d3..a298172 100644
> --- a/arch/mn10300/unit-asb2305/pci.c
> +++ b/arch/mn10300/unit-asb2305/pci.c
> @@ -372,7 +372,8 @@ static int __init pcibios_init(void)
>  
>  	pci_add_resource_offset(&resources, &pci_ioport_resource, io_offset);
>  	pci_add_resource_offset(&resources, &pci_iomem_resource, mem_offset);
> -	bus = pci_scan_root_bus(NULL, 0, &pci_direct_ampci, NULL, &resources);
> +	bus = pci_scan_root_bus(NULL, 0, 0, &pci_direct_ampci,
> +			NULL, &resources);
>  	if (!bus)
>  		return 0;
>  
> diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c
> index 2a525c9..9913f6c 100644
> --- a/arch/powerpc/kernel/pci-common.c
> +++ b/arch/powerpc/kernel/pci-common.c
> @@ -1612,8 +1612,8 @@ void pcibios_scan_phb(struct pci_controller *hose)
>  	pci_add_resource(&resources, &hose->busn);
>  
>  	/* Create an empty bus for the toplevel */
> -	bus = pci_create_root_bus(hose->parent, hose->first_busno,
> -				  hose->ops, hose, &resources);
> +	bus = pci_create_root_bus(hose->parent, hose->global_number,
> +			hose->first_busno, hose->ops, hose, &resources);
>  	if (bus == NULL) {
>  		pr_err("Failed to create bus for PCI domain %04x\n",
>  			hose->global_number);
> diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c
> index a2a7391..7c5199b 100644
> --- a/arch/s390/pci/pci.c
> +++ b/arch/s390/pci/pci.c
> @@ -770,8 +770,8 @@ static int zpci_scan_bus(struct zpci_dev *zdev)
>  	if (ret)
>  		return ret;
>  
> -	zdev->bus = pci_scan_root_bus(NULL, ZPCI_BUS_NR, &pci_root_ops,
> -				      zdev, &resources);
> +	zdev->bus = pci_scan_root_bus(NULL, zdev->domain, ZPCI_BUS_NR,
> +			&pci_root_ops, zdev, &resources);
>  	if (!zdev->bus) {
>  		zpci_cleanup_bus_resources(zdev);
>  		return -EIO;
> diff --git a/arch/sh/drivers/pci/pci.c b/arch/sh/drivers/pci/pci.c
> index d5462b7..293249a 100644
> --- a/arch/sh/drivers/pci/pci.c
> +++ b/arch/sh/drivers/pci/pci.c
> @@ -52,8 +52,8 @@ static void pcibios_scanbus(struct pci_channel *hose)
>  		pci_add_resource_offset(&resources, res, offset);
>  	}
>  
> -	bus = pci_scan_root_bus(NULL, next_busno, hose->pci_ops, hose,
> -				&resources);
> +	bus = pci_scan_root_bus(NULL, hose->index, next_busno,
> +			hose->pci_ops, hose, &resources);
>  	hose->bus = bus;
>  
>  	need_domain_info = need_domain_info || hose->index;
> diff --git a/arch/sparc/kernel/leon_pci.c b/arch/sparc/kernel/leon_pci.c
> index 4371f72..36d702d 100644
> --- a/arch/sparc/kernel/leon_pci.c
> +++ b/arch/sparc/kernel/leon_pci.c
> @@ -32,7 +32,7 @@ void leon_pci_init(struct platform_device *ofdev, struct leon_pci_info *info)
>  	info->busn.flags = IORESOURCE_BUS;
>  	pci_add_resource(&resources, &info->busn);
>  
> -	root_bus = pci_scan_root_bus(&ofdev->dev, 0, info->ops, info,
> +	root_bus = pci_scan_root_bus(&ofdev->dev, 0, 0, info->ops, info,
>  				     &resources);
>  	if (!root_bus) {
>  		pci_free_resource_list(&resources);
> diff --git a/arch/sparc/kernel/pci.c b/arch/sparc/kernel/pci.c
> index 9e267ca..e40e456 100644
> --- a/arch/sparc/kernel/pci.c
> +++ b/arch/sparc/kernel/pci.c
> @@ -667,8 +667,8 @@ struct pci_bus *pci_scan_one_pbm(struct pci_pbm_info *pbm,
>  	pbm->busn.end	= pbm->pci_last_busno;
>  	pbm->busn.flags	= IORESOURCE_BUS;
>  	pci_add_resource(&resources, &pbm->busn);
> -	bus = pci_create_root_bus(parent, pbm->pci_first_busno, pbm->pci_ops,
> -				  pbm, &resources);
> +	bus = pci_create_root_bus(parent, pbm->index, pbm->pci_first_busno,
> +			pbm->pci_ops, pbm, &resources);
>  	if (!bus) {
>  		printk(KERN_ERR "Failed to create bus for %s\n",
>  		       node->full_name);
> diff --git a/arch/sparc/kernel/pcic.c b/arch/sparc/kernel/pcic.c
> index 24384e1..7e86410 100644
> --- a/arch/sparc/kernel/pcic.c
> +++ b/arch/sparc/kernel/pcic.c
> @@ -390,7 +390,7 @@ static void __init pcic_pbm_scan_bus(struct linux_pcic *pcic)
>  {
>  	struct linux_pbm_info *pbm = &pcic->pbm;
>  
> -	pbm->pci_bus = pci_scan_bus(pbm->pci_first_busno, &pcic_ops, pbm);
> +	pbm->pci_bus = pci_scan_bus(0, pbm->pci_first_busno, &pcic_ops, pbm);
>  	if (!pbm->pci_bus)
>  		return;
>  
> diff --git a/arch/tile/kernel/pci.c b/arch/tile/kernel/pci.c
> index 9475a74..6ae0871 100644
> --- a/arch/tile/kernel/pci.c
> +++ b/arch/tile/kernel/pci.c
> @@ -306,8 +306,8 @@ int __init pcibios_init(void)
>  
>  			pci_add_resource(&resources, &ioport_resource);
>  			pci_add_resource(&resources, &iomem_resource);
> -			bus = pci_scan_root_bus(NULL, 0, controller->ops,
> -						controller, &resources);
> +			bus = pci_scan_root_bus(NULL, controller->index, 0,
> +					controller->ops, controller, &resources);
>  			controller->root_bus = bus;
>  			controller->last_busno = bus->busn_res.end;
>  		}
> diff --git a/arch/tile/kernel/pci_gx.c b/arch/tile/kernel/pci_gx.c
> index b1df847..d47a698 100644
> --- a/arch/tile/kernel/pci_gx.c
> +++ b/arch/tile/kernel/pci_gx.c
> @@ -881,8 +881,8 @@ int __init pcibios_init(void)
>  					controller->mem_offset);
>  		pci_add_resource(&resources, &controller->io_space);
>  		controller->first_busno = next_busno;
> -		bus = pci_scan_root_bus(NULL, next_busno, controller->ops,
> -					controller, &resources);
> +		bus = pci_scan_root_bus(NULL, controller->index, next_busno,
> +				controller->ops, controller, &resources);
>  		controller->root_bus = bus;
>  		next_busno = bus->busn_res.end + 1;
>  	}
> diff --git a/arch/unicore32/kernel/pci.c b/arch/unicore32/kernel/pci.c
> index d45fa5f..ef9be16 100644
> --- a/arch/unicore32/kernel/pci.c
> +++ b/arch/unicore32/kernel/pci.c
> @@ -258,7 +258,7 @@ static int __init pci_common_init(void)
>  
>  	pci_puv3_preinit();
>  
> -	puv3_bus = pci_scan_bus(0, &pci_puv3_ops, NULL);
> +	puv3_bus = pci_scan_bus(0, 0, &pci_puv3_ops, NULL);
>  
>  	if (!puv3_bus)
>  		panic("PCI: unable to scan bus!");
> diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c
> index 6ac2738..d2655d5 100644
> --- a/arch/x86/pci/acpi.c
> +++ b/arch/x86/pci/acpi.c
> @@ -425,8 +425,8 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
>  
>  		if (!setup_mcfg_map(info, domain, (u8)root->secondary.start,
>  				    (u8)root->secondary.end, root->mcfg_addr))
> -			bus = pci_create_root_bus(NULL, busnum, &pci_root_ops,
> -						  sd, &resources);
> +			bus = pci_create_root_bus(NULL, domain, busnum,
> +					&pci_root_ops, sd, &resources);
>  
>  		if (bus) {
>  			pci_scan_child_bus(bus);
> diff --git a/arch/x86/pci/common.c b/arch/x86/pci/common.c
> index 95a0ba7..9813266 100644
> --- a/arch/x86/pci/common.c
> +++ b/arch/x86/pci/common.c
> @@ -486,7 +486,7 @@ void pcibios_scan_root(int busnum)
>  	sd->node = x86_pci_root_bus_node(busnum);
>  	x86_pci_root_bus_resources(busnum, &resources);
>  	printk(KERN_DEBUG "PCI: Probing PCI hardware (bus %02x)\n", busnum);
> -	bus = pci_scan_root_bus(NULL, busnum, &pci_root_ops, sd, &resources);
> +	bus = pci_scan_root_bus(NULL, 0, busnum, &pci_root_ops, sd, &resources);
>  	if (!bus) {
>  		pci_free_resource_list(&resources);
>  		kfree(sd);
> diff --git a/arch/xtensa/kernel/pci.c b/arch/xtensa/kernel/pci.c
> index b848cc3..66da4c3 100644
> --- a/arch/xtensa/kernel/pci.c
> +++ b/arch/xtensa/kernel/pci.c
> @@ -183,7 +183,7 @@ static int __init pcibios_init(void)
>  		pci_ctrl->last_busno = 0xff;
>  		INIT_LIST_HEAD(&resources);
>  		pci_controller_apertures(pci_ctrl, &resources);
> -		bus = pci_scan_root_bus(NULL, pci_ctrl->first_busno,
> +		bus = pci_scan_root_bus(NULL, 0, pci_ctrl->first_busno,
>  					pci_ctrl->ops, pci_ctrl, &resources);
>  		if (!bus)
>  			continue;
> diff --git a/drivers/parisc/dino.c b/drivers/parisc/dino.c
> index a0580af..f375252 100644
> --- a/drivers/parisc/dino.c
> +++ b/drivers/parisc/dino.c
> @@ -986,7 +986,7 @@ static int __init dino_probe(struct parisc_device *dev)
>  	** with configuration accessor functions.
>  	*/
>  	dino_dev->hba.hba_bus = bus = pci_create_root_bus(&dev->dev,
> -			 dino_current_bus, &dino_cfg_ops, NULL, &resources);
> +			 0, dino_current_bus, &dino_cfg_ops, NULL, &resources);
>  	if (!bus) {
>  		printk(KERN_ERR "ERROR: failed to scan PCI bus on %s (duplicate bus number %d?)\n",
>  		       dev_name(&dev->dev), dino_current_bus);
> diff --git a/drivers/parisc/lba_pci.c b/drivers/parisc/lba_pci.c
> index dceb9dd..2949030 100644
> --- a/drivers/parisc/lba_pci.c
> +++ b/drivers/parisc/lba_pci.c
> @@ -1563,7 +1563,7 @@ lba_driver_probe(struct parisc_device *dev)
>  
>  	dev->dev.platform_data = lba_dev;
>  	lba_bus = lba_dev->hba.hba_bus =
> -		pci_create_root_bus(&dev->dev, lba_dev->hba.bus_num.start,
> +		pci_create_root_bus(&dev->dev, 0, lba_dev->hba.bus_num.start,
>  				    cfg_ops, NULL, &resources);
>  	if (!lba_bus) {
>  		pci_free_resource_list(&resources);
> diff --git a/drivers/pci/host/pci-mvebu.c b/drivers/pci/host/pci-mvebu.c
> index 1309cfb..0cfc494 100644
> --- a/drivers/pci/host/pci-mvebu.c
> +++ b/drivers/pci/host/pci-mvebu.c
> @@ -755,7 +755,7 @@ static struct pci_bus *mvebu_pcie_scan_bus(int nr, struct pci_sys_data *sys)
>  	struct mvebu_pcie *pcie = sys_to_pcie(sys);
>  	struct pci_bus *bus;
>  
> -	bus = pci_create_root_bus(&pcie->pdev->dev, sys->busnr,
> +	bus = pci_create_root_bus(&pcie->pdev->dev, -1, sys->busnr,
>  				  &mvebu_pcie_ops, sys, &sys->resources);
>  	if (!bus)
>  		return NULL;
> diff --git a/drivers/pci/host/pci-tegra.c b/drivers/pci/host/pci-tegra.c
> index 00e9272..94e9362 100644
> --- a/drivers/pci/host/pci-tegra.c
> +++ b/drivers/pci/host/pci-tegra.c
> @@ -635,8 +635,8 @@ static struct pci_bus *tegra_pcie_scan_bus(int nr, struct pci_sys_data *sys)
>  	struct tegra_pcie *pcie = sys_to_pcie(sys);
>  	struct pci_bus *bus;
>  
> -	bus = pci_create_root_bus(pcie->dev, sys->busnr, &tegra_pcie_ops, sys,
> -				  &sys->resources);
> +	bus = pci_create_root_bus(pcie->dev, -1, sys->busnr, &tegra_pcie_ops,
> +			sys, &sys->resources);
>  	if (!bus)
>  		return NULL;
>  
> diff --git a/drivers/pci/host/pci-versatile.c b/drivers/pci/host/pci-versatile.c
> index e3a2450..58a22a9 100644
> --- a/drivers/pci/host/pci-versatile.c
> +++ b/drivers/pci/host/pci-versatile.c
> @@ -208,7 +208,8 @@ static int versatile_pci_probe(struct platform_device *pdev)
>  	pci_add_flags(PCI_ENABLE_PROC_DOMAINS);
>  	pci_add_flags(PCI_REASSIGN_ALL_BUS | PCI_REASSIGN_ALL_RSRC);
>  
> -	bus = pci_scan_root_bus(&pdev->dev, 0, &pci_versatile_ops, &sys, &pci_res);
> +	bus = pci_scan_root_bus(&pdev->dev, -1, 0, &pci_versatile_ops,
> +			&sys, &pci_res);
>  	if (!bus)
>  		return -ENOMEM;
>  
> diff --git a/drivers/pci/host/pci-xgene.c b/drivers/pci/host/pci-xgene.c
> index aab5547..078e853 100644
> --- a/drivers/pci/host/pci-xgene.c
> +++ b/drivers/pci/host/pci-xgene.c
> @@ -499,7 +499,7 @@ static int xgene_pcie_probe_bridge(struct platform_device *pdev)
>  	if (ret)
>  		return ret;
>  
> -	bus = pci_create_root_bus(&pdev->dev, 0,
> +	bus = pci_create_root_bus(&pdev->dev, -1, 0,
>  					&xgene_pcie_ops, port, &res);
>  	if (!bus)
>  		return -ENOMEM;
> diff --git a/drivers/pci/host/pcie-designware.c b/drivers/pci/host/pcie-designware.c
> index 1f4ea6f..93778b9 100644
> --- a/drivers/pci/host/pcie-designware.c
> +++ b/drivers/pci/host/pcie-designware.c
> @@ -728,7 +728,7 @@ static struct pci_bus *dw_pcie_scan_bus(int nr, struct pci_sys_data *sys)
>  	struct pcie_port *pp = sys_to_pcie(sys);
>  
>  	pp->root_bus_nr = sys->busnr;
> -	bus = pci_create_root_bus(pp->dev, sys->busnr,
> +	bus = pci_create_root_bus(pp->dev, -1, sys->busnr,
>  				  &dw_pcie_ops, sys, &sys->resources);
>  	if (!bus)
>  		return NULL;
> diff --git a/drivers/pci/host/pcie-xilinx.c b/drivers/pci/host/pcie-xilinx.c
> index f1a06a0..b5a72a5 100644
> --- a/drivers/pci/host/pcie-xilinx.c
> +++ b/drivers/pci/host/pcie-xilinx.c
> @@ -647,7 +647,7 @@ static struct pci_bus *xilinx_pcie_scan_bus(int nr, struct pci_sys_data *sys)
>  	struct pci_bus *bus;
>  
>  	port->root_busno = sys->busnr;
> -	bus = pci_scan_root_bus(port->dev, sys->busnr, &xilinx_pcie_ops,
> +	bus = pci_scan_root_bus(port->dev, -1, sys->busnr, &xilinx_pcie_ops,
>  				sys, &sys->resources);
>  
>  	return bus;
> diff --git a/drivers/pci/hotplug/ibmphp_core.c b/drivers/pci/hotplug/ibmphp_core.c
> index 1530247..db6240e 100644
> --- a/drivers/pci/hotplug/ibmphp_core.c
> +++ b/drivers/pci/hotplug/ibmphp_core.c
> @@ -765,7 +765,7 @@ static u8 bus_structure_fixup(u8 busno)
>  					(l != 0x0000) && (l != 0xffff)) {
>  			debug("%s - Inside bus_structure_fixup()\n",
>  							__func__);
> -			b = pci_scan_bus(busno, ibmphp_pci_bus->ops, NULL);
> +			b = pci_scan_bus(0, busno, ibmphp_pci_bus->ops, NULL);
>  			if (!b)
>  				continue;
>  
> diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
> index 699a238..767f009 100644
> --- a/drivers/pci/probe.c
> +++ b/drivers/pci/probe.c
> @@ -1889,8 +1889,9 @@ void __weak pcibios_remove_bus(struct pci_bus *bus)
>  {
>  }
>  
> -struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
> -		struct pci_ops *ops, void *sysdata, struct list_head *resources)
> +struct pci_bus *pci_create_root_bus(struct device *parent, int domain,
> +		int bus, struct pci_ops *ops, void *sysdata,
> +		struct list_head *resources)
>  {
>  	int error;
>  	struct pci_host_bridge *bridge;
> @@ -1920,6 +1921,7 @@ struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
>  	if (!bridge)
>  		goto err_out;
>  
> +	bridge->domain = domain;
>  	bridge->dev.parent = parent;
>  	bridge->dev.release = pci_release_host_bridge_dev;
>  	dev_set_name(&bridge->dev, "pci%04x:%02x", pci_domain_nr(b), bus);
> @@ -2057,8 +2059,9 @@ void pci_bus_release_busn_res(struct pci_bus *b)
>  			res, ret ? "can not be" : "is");
>  }
>  
> -struct pci_bus *pci_scan_root_bus(struct device *parent, int bus,
> -		struct pci_ops *ops, void *sysdata, struct list_head *resources)
> +struct pci_bus *pci_scan_root_bus(struct device *parent, int domain,
> +		int bus, struct pci_ops *ops, void *sysdata,
> +		struct list_head *resources)
>  {
>  	struct resource_entry *window;
>  	bool found = false;
> @@ -2071,7 +2074,8 @@ struct pci_bus *pci_scan_root_bus(struct device *parent, int bus,
>  			break;
>  		}
>  
> -	b = pci_create_root_bus(parent, bus, ops, sysdata, resources);
> +	b = pci_create_root_bus(parent, domain, bus, ops,
> +			sysdata, resources);
>  	if (!b)
>  		return NULL;
>  
> @@ -2091,8 +2095,8 @@ struct pci_bus *pci_scan_root_bus(struct device *parent, int bus,
>  }
>  EXPORT_SYMBOL(pci_scan_root_bus);
>  
> -struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops,
> -					void *sysdata)
> +struct pci_bus *pci_scan_bus(int domain, int bus,
> +		struct pci_ops *ops, void *sysdata)
>  {
>  	LIST_HEAD(resources);
>  	struct pci_bus *b;
> @@ -2100,7 +2104,8 @@ struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops,
>  	pci_add_resource(&resources, &ioport_resource);
>  	pci_add_resource(&resources, &iomem_resource);
>  	pci_add_resource(&resources, &busn_resource);
> -	b = pci_create_root_bus(NULL, bus, ops, sysdata, &resources);
> +	b = pci_create_root_bus(NULL, domain, bus, ops, sysdata,
> +			&resources);
>  	if (b) {
>  		pci_scan_child_bus(b);
>  	} else {
> diff --git a/drivers/pci/xen-pcifront.c b/drivers/pci/xen-pcifront.c
> index a69e529..830a31e 100644
> --- a/drivers/pci/xen-pcifront.c
> +++ b/drivers/pci/xen-pcifront.c
> @@ -483,7 +483,7 @@ static int pcifront_scan_root(struct pcifront_device *pdev,
>  
>  	pci_lock_rescan_remove();
>  
> -	b = pci_scan_root_bus(&pdev->xdev->dev, bus,
> +	b = pci_scan_root_bus(&pdev->xdev->dev, sd->domain, bus,
>  				  &pcifront_bus_ops, sd, &resources);
>  	if (!b) {
>  		dev_err(&pdev->xdev->dev,
> diff --git a/include/linux/pci.h b/include/linux/pci.h
> index 36effb8..2b575bc 100644
> --- a/include/linux/pci.h
> +++ b/include/linux/pci.h
> @@ -401,6 +401,7 @@ static inline int pci_channel_offline(struct pci_dev *pdev)
>  }
>  
>  struct pci_host_bridge {
> +	int domain;
>  	struct device dev;
>  	struct pci_bus *bus;		/* root bus */
>  	struct list_head windows;	/* resource_entry */
> @@ -769,14 +770,15 @@ void pcibios_bus_to_resource(struct pci_bus *bus, struct resource *res,
>  void pcibios_scan_specific_bus(int busn);
>  struct pci_bus *pci_find_bus(int domain, int busnr);
>  void pci_bus_add_devices(const struct pci_bus *bus);
> -struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, void *sysdata);
> -struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
> +struct pci_bus *pci_scan_bus(int domain, int bus, struct pci_ops *ops,
> +					void *sysdata);
> +struct pci_bus *pci_create_root_bus(struct device *parent, int domain, int bus,
>  				    struct pci_ops *ops, void *sysdata,
>  				    struct list_head *resources);
>  int pci_bus_insert_busn_res(struct pci_bus *b, int bus, int busmax);
>  int pci_bus_update_busn_res_end(struct pci_bus *b, int busmax);
>  void pci_bus_release_busn_res(struct pci_bus *b);
> -struct pci_bus *pci_scan_root_bus(struct device *parent, int bus,
> +struct pci_bus *pci_scan_root_bus(struct device *parent, int domain, int bus,
>  					     struct pci_ops *ops, void *sysdata,
>  					     struct list_head *resources);
>  struct pci_bus *pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev,
> 

-- 
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com