| Message ID | 1416219710-26088-5-git-send-email-wangyijing@huawei.com (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
On Mon, Nov 17, 2014 at 10:21:38AM +0000, Yijing Wang wrote: > Rip out pci_bus_add_devices() from pci_scan_root_bus() > for following reasons. > 1. pci_scan_root_bus() means we only do the scan, we should > not add pci busses. > 2. A lots of drviers which use pci_scan_root_bus() call > pci_bus_size_bridges(), pci_bus_assign_resources() after > pci_scan_root_bus(). But strictly speaking pci_bus_add_devices() > should be called after the resources assignment. This looks like a nice cleanup! Can we split this patch out of the series and start the ball running on getting ACKs for it? You are touching a lot of drivers here, you probably don't want the whole series to wait on approvals for this. Best regards, Liviu > > Signed-off-by: Yijing Wang <wangyijing@huawei.com> > --- > arch/alpha/kernel/pci.c | 1 + > arch/alpha/kernel/sys_nautilus.c | 1 + > arch/frv/mb93090-mb00/pci-vdk.c | 8 +++++--- > arch/ia64/sn/kernel/io_init.c | 2 ++ > arch/m68k/coldfire/pci.c | 1 + > arch/microblaze/pci/pci-common.c | 2 +- > arch/mips/pci/pci.c | 1 + > arch/mn10300/unit-asb2305/pci.c | 7 +++++-- > arch/s390/pci/pci.c | 2 +- > arch/sh/drivers/pci/pci.c | 1 + > arch/sparc/kernel/leon_pci.c | 1 + > arch/sparc/kernel/pcic.c | 2 ++ > arch/tile/kernel/pci.c | 3 ++- > arch/tile/kernel/pci_gx.c | 3 ++- > arch/unicore32/kernel/pci.c | 2 +- > arch/x86/pci/common.c | 10 ++++++---- > arch/xtensa/kernel/pci.c | 1 + > drivers/pci/host/pci-xgene.c | 2 +- > drivers/pci/hotplug/ibmphp_core.c | 6 ++++-- > drivers/pci/probe.c | 1 - > 20 files changed, 39 insertions(+), 18 deletions(-) > > diff --git a/arch/alpha/kernel/pci.c b/arch/alpha/kernel/pci.c > index 076c35c..81251a5 100644 > --- a/arch/alpha/kernel/pci.c > +++ b/arch/alpha/kernel/pci.c > @@ -349,6 +349,7 @@ common_init_pci(void) > > pci_assign_unassigned_resources(); > pci_fixup_irqs(alpha_mv.pci_swizzle, alpha_mv.pci_map_irq); > + pci_bus_add_devices(bus); > } > > > diff --git a/arch/alpha/kernel/sys_nautilus.c b/arch/alpha/kernel/sys_nautilus.c > index 1047ab3..60fbd77 100644 > --- a/arch/alpha/kernel/sys_nautilus.c > +++ b/arch/alpha/kernel/sys_nautilus.c > @@ -253,6 +253,7 @@ nautilus_init_pci(void) > for the root bus, so just clear it. */ > bus->self = NULL; > pci_fixup_irqs(alpha_mv.pci_swizzle, alpha_mv.pci_map_irq); > + pci_bus_add_devices(bus); > } > > /* > diff --git a/arch/frv/mb93090-mb00/pci-vdk.c b/arch/frv/mb93090-mb00/pci-vdk.c > index efa5d65..85f87dc 100644 > --- a/arch/frv/mb93090-mb00/pci-vdk.c > +++ b/arch/frv/mb93090-mb00/pci-vdk.c > @@ -316,6 +316,7 @@ void pcibios_fixup_bus(struct pci_bus *bus) > > int __init pcibios_init(void) > { > + struct pci_bus *bus = NULL; > struct pci_ops *dir = NULL; > LIST_HEAD(resources); > > @@ -383,12 +384,13 @@ 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); > - pci_scan_root_bus(NULL, 0, pci_root_ops, NULL, &resources); > - > + bus = pci_scan_root_bus(NULL, 0, pci_root_ops, NULL, &resources); > + if (!bus) > + return -ENXIO; > pcibios_irq_init(); > pcibios_fixup_irqs(); > pcibios_resource_survey(); > - > + pci_bus_add_devices(bus); > return 0; > } > > diff --git a/arch/ia64/sn/kernel/io_init.c b/arch/ia64/sn/kernel/io_init.c > index 0b5ce82..1be65eb 100644 > --- a/arch/ia64/sn/kernel/io_init.c > +++ b/arch/ia64/sn/kernel/io_init.c > @@ -271,7 +271,9 @@ sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus) > if (bus == NULL) { > kfree(res); > kfree(controller); > + return; > } > + pci_bus_add_devices(bus); > } > > /* > diff --git a/arch/m68k/coldfire/pci.c b/arch/m68k/coldfire/pci.c > index 4d242fb..840a431 100644 > --- a/arch/m68k/coldfire/pci.c > +++ b/arch/m68k/coldfire/pci.c > @@ -319,6 +319,7 @@ static int __init mcf_pci_init(void) > pci_fixup_irqs(pci_common_swizzle, mcf_pci_map_irq); > pci_bus_size_bridges(rootbus); > pci_bus_assign_resources(rootbus); > + pci_bus_add_devices(rootbus); > return 0; > } > > diff --git a/arch/microblaze/pci/pci-common.c b/arch/microblaze/pci/pci-common.c > index 9037914..9ca7e3f 100644 > --- a/arch/microblaze/pci/pci-common.c > +++ b/arch/microblaze/pci/pci-common.c > @@ -1344,8 +1344,8 @@ static void pcibios_scan_phb(struct pci_controller *hose) > } > bus->busn_res.start = hose->first_busno; > hose->bus = bus; > - > hose->last_busno = bus->busn_res.end; > + pci_bus_add_devices(bus); > } > > static int __init pcibios_init(void) > diff --git a/arch/mips/pci/pci.c b/arch/mips/pci/pci.c > index 1bf60b1..f083688 100644 > --- a/arch/mips/pci/pci.c > +++ b/arch/mips/pci/pci.c > @@ -113,6 +113,7 @@ static void pcibios_scanbus(struct pci_controller *hose) > if (!pci_has_flag(PCI_PROBE_ONLY)) { > pci_bus_size_bridges(bus); > pci_bus_assign_resources(bus); > + pci_bus_add_devices(bus); > } > } > } > diff --git a/arch/mn10300/unit-asb2305/pci.c b/arch/mn10300/unit-asb2305/pci.c > index 6b4339f..011af54 100644 > --- a/arch/mn10300/unit-asb2305/pci.c > +++ b/arch/mn10300/unit-asb2305/pci.c > @@ -345,6 +345,7 @@ void pcibios_fixup_bus(struct pci_bus *bus) > */ > static int __init pcibios_init(void) > { > + struct pci_bus *bus; > resource_size_t io_offset, mem_offset; > LIST_HEAD(resources); > > @@ -376,11 +377,13 @@ 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); > - pci_scan_root_bus(NULL, 0, &pci_direct_ampci, NULL, &resources); > - > + bus = pci_scan_root_bus(NULL, 0, &pci_direct_ampci, NULL, &resources); > + if (!bus) > + return 0; > pcibios_irq_init(); > pcibios_fixup_irqs(); > pcibios_resource_survey(); > + pci_bus_add_devices(bus); > return 0; > } > > diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c > index 2fa7b14..016ea48 100644 > --- a/arch/s390/pci/pci.c > +++ b/arch/s390/pci/pci.c > @@ -755,7 +755,7 @@ static int zpci_scan_bus(struct zpci_dev *zdev) > zpci_cleanup_bus_resources(zdev); > return -EIO; > } > - > + pci_bus_add_devices(zdev->bus); > zdev->bus->max_bus_speed = zdev->max_bus_speed; > return 0; > } > diff --git a/arch/sh/drivers/pci/pci.c b/arch/sh/drivers/pci/pci.c > index 1bc09ee..efc1051 100644 > --- a/arch/sh/drivers/pci/pci.c > +++ b/arch/sh/drivers/pci/pci.c > @@ -69,6 +69,7 @@ static void pcibios_scanbus(struct pci_channel *hose) > > pci_bus_size_bridges(bus); > pci_bus_assign_resources(bus); > + pci_bus_add_devices(bus); > } else { > pci_free_resource_list(&resources); > } > diff --git a/arch/sparc/kernel/leon_pci.c b/arch/sparc/kernel/leon_pci.c > index 899b720..2971076 100644 > --- a/arch/sparc/kernel/leon_pci.c > +++ b/arch/sparc/kernel/leon_pci.c > @@ -40,6 +40,7 @@ void leon_pci_init(struct platform_device *ofdev, struct leon_pci_info *info) > > /* Assign devices with resources */ > pci_assign_unassigned_resources(); > + pci_bus_add_devices(root_bus); > } else { > pci_free_resource_list(&resources); > } > diff --git a/arch/sparc/kernel/pcic.c b/arch/sparc/kernel/pcic.c > index 64aafac..5457814 100644 > --- a/arch/sparc/kernel/pcic.c > +++ b/arch/sparc/kernel/pcic.c > @@ -392,6 +392,8 @@ static void __init pcic_pbm_scan_bus(struct linux_pcic *pcic) > > pbm->pci_bus = pci_scan_root_bus(NULL, pbm->pci_first_busno, > &pcic_ops, pbm, NULL); > + if (pbm->pci_bus) > + pci_bus_add_devices(pbm->pci_bus); > #if 0 /* deadwood transplanted from sparc64 */ > pci_fill_in_pbm_cookies(pbm->pci_bus, pbm, pbm->prom_node); > pci_record_assignments(pbm, pbm->pci_bus); > diff --git a/arch/tile/kernel/pci.c b/arch/tile/kernel/pci.c > index 1f80a88..268423e 100644 > --- a/arch/tile/kernel/pci.c > +++ b/arch/tile/kernel/pci.c > @@ -326,7 +326,8 @@ int __init pcibios_init(void) > > /* Configure the max_read_size and max_payload_size values. */ > fixup_read_and_payload_sizes(); > - > + if (bus) > + pci_bus_add_devices(bus); > /* Record the I/O resources in the PCI controller structure. */ > for (i = 0; i < TILE_NUM_PCIE; i++) { > /* > diff --git a/arch/tile/kernel/pci_gx.c b/arch/tile/kernel/pci_gx.c > index e39f9c5..5f05a9a 100644 > --- a/arch/tile/kernel/pci_gx.c > +++ b/arch/tile/kernel/pci_gx.c > @@ -903,7 +903,8 @@ int __init pcibios_init(void) > * associated with the devices read in above. > */ > pci_assign_unassigned_resources(); > - > + if (bus) > + pci_bus_add_devices(bus); > /* Record the I/O resources in the PCI controller structure. */ > for (i = 0; i < num_rc_controllers; i++) { > struct pci_controller *controller = &pci_controllers[i]; > diff --git a/arch/unicore32/kernel/pci.c b/arch/unicore32/kernel/pci.c > index be0f261..0d4c563 100644 > --- a/arch/unicore32/kernel/pci.c > +++ b/arch/unicore32/kernel/pci.c > @@ -270,11 +270,11 @@ static int __init pci_common_init(void) > * Size the bridge windows. > */ > pci_bus_size_bridges(puv3_bus); > - > /* > * Assign resources. > */ > pci_bus_assign_resources(puv3_bus); > + pci_bus_add_devices(puv3_bus); > } > > return 0; > diff --git a/arch/x86/pci/common.c b/arch/x86/pci/common.c > index 7b20bcc..b16632b 100644 > --- a/arch/x86/pci/common.c > +++ b/arch/x86/pci/common.c > @@ -471,10 +471,12 @@ void pcibios_scan_root(int 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); > - if (!bus) { > - pci_free_resource_list(&resources); > - kfree(sd); > - } > + if (bus) { > + pci_bus_add_devices(bus); > + return; > + } > + pci_free_resource_list(&resources); > + kfree(sd); > } > > void __init pcibios_set_cache_line_size(void) > diff --git a/arch/xtensa/kernel/pci.c b/arch/xtensa/kernel/pci.c > index 5b34033..c4b5b5d 100644 > --- a/arch/xtensa/kernel/pci.c > +++ b/arch/xtensa/kernel/pci.c > @@ -185,6 +185,7 @@ static int __init pcibios_init(void) > pci_controller_apertures(pci_ctrl, &resources); > bus = pci_scan_root_bus(NULL, pci_ctrl->first_busno, > pci_ctrl->ops, pci_ctrl, &resources); > + pci_bus_add_devices(bus); > pci_ctrl->bus = bus; > pci_ctrl->last_busno = bus->busn_res.end; > if (next_busno <= pci_ctrl->last_busno) > diff --git a/drivers/pci/host/pci-xgene.c b/drivers/pci/host/pci-xgene.c > index 9ecabfa..e7a4f66 100644 > --- a/drivers/pci/host/pci-xgene.c > +++ b/drivers/pci/host/pci-xgene.c > @@ -634,7 +634,7 @@ static int xgene_pcie_probe_bridge(struct platform_device *pdev) > bus = pci_scan_root_bus(&pdev->dev, 0, &xgene_pcie_ops, port, &res); > if (!bus) > return -ENOMEM; > - > + pci_bus_add_devices(bus); > platform_set_drvdata(pdev, port); > return 0; > } > diff --git a/drivers/pci/hotplug/ibmphp_core.c b/drivers/pci/hotplug/ibmphp_core.c > index b486432..76ce157 100644 > --- a/drivers/pci/hotplug/ibmphp_core.c > +++ b/drivers/pci/hotplug/ibmphp_core.c > @@ -740,7 +740,7 @@ static void ibm_unconfigure_device(struct pci_func *func) > */ > static u8 bus_structure_fixup(u8 busno) > { > - struct pci_bus *bus; > + struct pci_bus *bus, *b; > struct pci_dev *dev; > u16 l; > > @@ -767,7 +767,9 @@ static u8 bus_structure_fixup(u8 busno) > (l != 0x0000) && (l != 0xffff)) { > debug("%s - Inside bus_structure_fixup()\n", > __func__); > - pci_scan_root_bus(NULL, busno, ibmphp_pci_bus->ops, NULL, NULL); > + b = pci_scan_root_bus(NULL, busno, ibmphp_pci_bus->ops, NULL, NULL); > + if (b) > + pci_bus_add_devices(b); > break; > } > } > diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c > index 0a02fc2..97711f3 100644 > --- a/drivers/pci/probe.c > +++ b/drivers/pci/probe.c > @@ -2101,7 +2101,6 @@ struct pci_bus *pci_scan_root_bus(struct device *parent, int bus, > if (!found) > pci_bus_update_busn_res_end(b, max); > > - pci_bus_add_devices(b); > return b; > } > EXPORT_SYMBOL(pci_scan_root_bus); > -- > 1.7.1 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-pci" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html >
On 2014/11/18 22:34, Liviu Dudau wrote: > On Mon, Nov 17, 2014 at 10:21:38AM +0000, Yijing Wang wrote: >> Rip out pci_bus_add_devices() from pci_scan_root_bus() >> for following reasons. >> 1. pci_scan_root_bus() means we only do the scan, we should >> not add pci busses. >> 2. A lots of drviers which use pci_scan_root_bus() call >> pci_bus_size_bridges(), pci_bus_assign_resources() after >> pci_scan_root_bus(). But strictly speaking pci_bus_add_devices() >> should be called after the resources assignment. > > This looks like a nice cleanup! Can we split this patch out > of the series and start the ball running on getting ACKs > for it? You are touching a lot of drivers here, you probably > don't want the whole series to wait on approvals for this. OK, I will separately this one out of this series. > > Best regards, > Liviu > >> >> Signed-off-by: Yijing Wang <wangyijing@huawei.com> >> --- >> arch/alpha/kernel/pci.c | 1 + >> arch/alpha/kernel/sys_nautilus.c | 1 + >> arch/frv/mb93090-mb00/pci-vdk.c | 8 +++++--- >> arch/ia64/sn/kernel/io_init.c | 2 ++ >> arch/m68k/coldfire/pci.c | 1 + >> arch/microblaze/pci/pci-common.c | 2 +- >> arch/mips/pci/pci.c | 1 + >> arch/mn10300/unit-asb2305/pci.c | 7 +++++-- >> arch/s390/pci/pci.c | 2 +- >> arch/sh/drivers/pci/pci.c | 1 + >> arch/sparc/kernel/leon_pci.c | 1 + >> arch/sparc/kernel/pcic.c | 2 ++ >> arch/tile/kernel/pci.c | 3 ++- >> arch/tile/kernel/pci_gx.c | 3 ++- >> arch/unicore32/kernel/pci.c | 2 +- >> arch/x86/pci/common.c | 10 ++++++---- >> arch/xtensa/kernel/pci.c | 1 + >> drivers/pci/host/pci-xgene.c | 2 +- >> drivers/pci/hotplug/ibmphp_core.c | 6 ++++-- >> drivers/pci/probe.c | 1 - >> 20 files changed, 39 insertions(+), 18 deletions(-) >> >> diff --git a/arch/alpha/kernel/pci.c b/arch/alpha/kernel/pci.c >> index 076c35c..81251a5 100644 >> --- a/arch/alpha/kernel/pci.c >> +++ b/arch/alpha/kernel/pci.c >> @@ -349,6 +349,7 @@ common_init_pci(void) >> >> pci_assign_unassigned_resources(); >> pci_fixup_irqs(alpha_mv.pci_swizzle, alpha_mv.pci_map_irq); >> + pci_bus_add_devices(bus); >> } >> >> >> diff --git a/arch/alpha/kernel/sys_nautilus.c b/arch/alpha/kernel/sys_nautilus.c >> index 1047ab3..60fbd77 100644 >> --- a/arch/alpha/kernel/sys_nautilus.c >> +++ b/arch/alpha/kernel/sys_nautilus.c >> @@ -253,6 +253,7 @@ nautilus_init_pci(void) >> for the root bus, so just clear it. */ >> bus->self = NULL; >> pci_fixup_irqs(alpha_mv.pci_swizzle, alpha_mv.pci_map_irq); >> + pci_bus_add_devices(bus); >> } >> >> /* >> diff --git a/arch/frv/mb93090-mb00/pci-vdk.c b/arch/frv/mb93090-mb00/pci-vdk.c >> index efa5d65..85f87dc 100644 >> --- a/arch/frv/mb93090-mb00/pci-vdk.c >> +++ b/arch/frv/mb93090-mb00/pci-vdk.c >> @@ -316,6 +316,7 @@ void pcibios_fixup_bus(struct pci_bus *bus) >> >> int __init pcibios_init(void) >> { >> + struct pci_bus *bus = NULL; >> struct pci_ops *dir = NULL; >> LIST_HEAD(resources); >> >> @@ -383,12 +384,13 @@ 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); >> - pci_scan_root_bus(NULL, 0, pci_root_ops, NULL, &resources); >> - >> + bus = pci_scan_root_bus(NULL, 0, pci_root_ops, NULL, &resources); >> + if (!bus) >> + return -ENXIO; >> pcibios_irq_init(); >> pcibios_fixup_irqs(); >> pcibios_resource_survey(); >> - >> + pci_bus_add_devices(bus); >> return 0; >> } >> >> diff --git a/arch/ia64/sn/kernel/io_init.c b/arch/ia64/sn/kernel/io_init.c >> index 0b5ce82..1be65eb 100644 >> --- a/arch/ia64/sn/kernel/io_init.c >> +++ b/arch/ia64/sn/kernel/io_init.c >> @@ -271,7 +271,9 @@ sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus) >> if (bus == NULL) { >> kfree(res); >> kfree(controller); >> + return; >> } >> + pci_bus_add_devices(bus); >> } >> >> /* >> diff --git a/arch/m68k/coldfire/pci.c b/arch/m68k/coldfire/pci.c >> index 4d242fb..840a431 100644 >> --- a/arch/m68k/coldfire/pci.c >> +++ b/arch/m68k/coldfire/pci.c >> @@ -319,6 +319,7 @@ static int __init mcf_pci_init(void) >> pci_fixup_irqs(pci_common_swizzle, mcf_pci_map_irq); >> pci_bus_size_bridges(rootbus); >> pci_bus_assign_resources(rootbus); >> + pci_bus_add_devices(rootbus); >> return 0; >> } >> >> diff --git a/arch/microblaze/pci/pci-common.c b/arch/microblaze/pci/pci-common.c >> index 9037914..9ca7e3f 100644 >> --- a/arch/microblaze/pci/pci-common.c >> +++ b/arch/microblaze/pci/pci-common.c >> @@ -1344,8 +1344,8 @@ static void pcibios_scan_phb(struct pci_controller *hose) >> } >> bus->busn_res.start = hose->first_busno; >> hose->bus = bus; >> - >> hose->last_busno = bus->busn_res.end; >> + pci_bus_add_devices(bus); >> } >> >> static int __init pcibios_init(void) >> diff --git a/arch/mips/pci/pci.c b/arch/mips/pci/pci.c >> index 1bf60b1..f083688 100644 >> --- a/arch/mips/pci/pci.c >> +++ b/arch/mips/pci/pci.c >> @@ -113,6 +113,7 @@ static void pcibios_scanbus(struct pci_controller *hose) >> if (!pci_has_flag(PCI_PROBE_ONLY)) { >> pci_bus_size_bridges(bus); >> pci_bus_assign_resources(bus); >> + pci_bus_add_devices(bus); >> } >> } >> } >> diff --git a/arch/mn10300/unit-asb2305/pci.c b/arch/mn10300/unit-asb2305/pci.c >> index 6b4339f..011af54 100644 >> --- a/arch/mn10300/unit-asb2305/pci.c >> +++ b/arch/mn10300/unit-asb2305/pci.c >> @@ -345,6 +345,7 @@ void pcibios_fixup_bus(struct pci_bus *bus) >> */ >> static int __init pcibios_init(void) >> { >> + struct pci_bus *bus; >> resource_size_t io_offset, mem_offset; >> LIST_HEAD(resources); >> >> @@ -376,11 +377,13 @@ 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); >> - pci_scan_root_bus(NULL, 0, &pci_direct_ampci, NULL, &resources); >> - >> + bus = pci_scan_root_bus(NULL, 0, &pci_direct_ampci, NULL, &resources); >> + if (!bus) >> + return 0; >> pcibios_irq_init(); >> pcibios_fixup_irqs(); >> pcibios_resource_survey(); >> + pci_bus_add_devices(bus); >> return 0; >> } >> >> diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c >> index 2fa7b14..016ea48 100644 >> --- a/arch/s390/pci/pci.c >> +++ b/arch/s390/pci/pci.c >> @@ -755,7 +755,7 @@ static int zpci_scan_bus(struct zpci_dev *zdev) >> zpci_cleanup_bus_resources(zdev); >> return -EIO; >> } >> - >> + pci_bus_add_devices(zdev->bus); >> zdev->bus->max_bus_speed = zdev->max_bus_speed; >> return 0; >> } >> diff --git a/arch/sh/drivers/pci/pci.c b/arch/sh/drivers/pci/pci.c >> index 1bc09ee..efc1051 100644 >> --- a/arch/sh/drivers/pci/pci.c >> +++ b/arch/sh/drivers/pci/pci.c >> @@ -69,6 +69,7 @@ static void pcibios_scanbus(struct pci_channel *hose) >> >> pci_bus_size_bridges(bus); >> pci_bus_assign_resources(bus); >> + pci_bus_add_devices(bus); >> } else { >> pci_free_resource_list(&resources); >> } >> diff --git a/arch/sparc/kernel/leon_pci.c b/arch/sparc/kernel/leon_pci.c >> index 899b720..2971076 100644 >> --- a/arch/sparc/kernel/leon_pci.c >> +++ b/arch/sparc/kernel/leon_pci.c >> @@ -40,6 +40,7 @@ void leon_pci_init(struct platform_device *ofdev, struct leon_pci_info *info) >> >> /* Assign devices with resources */ >> pci_assign_unassigned_resources(); >> + pci_bus_add_devices(root_bus); >> } else { >> pci_free_resource_list(&resources); >> } >> diff --git a/arch/sparc/kernel/pcic.c b/arch/sparc/kernel/pcic.c >> index 64aafac..5457814 100644 >> --- a/arch/sparc/kernel/pcic.c >> +++ b/arch/sparc/kernel/pcic.c >> @@ -392,6 +392,8 @@ static void __init pcic_pbm_scan_bus(struct linux_pcic *pcic) >> >> pbm->pci_bus = pci_scan_root_bus(NULL, pbm->pci_first_busno, >> &pcic_ops, pbm, NULL); >> + if (pbm->pci_bus) >> + pci_bus_add_devices(pbm->pci_bus); >> #if 0 /* deadwood transplanted from sparc64 */ >> pci_fill_in_pbm_cookies(pbm->pci_bus, pbm, pbm->prom_node); >> pci_record_assignments(pbm, pbm->pci_bus); >> diff --git a/arch/tile/kernel/pci.c b/arch/tile/kernel/pci.c >> index 1f80a88..268423e 100644 >> --- a/arch/tile/kernel/pci.c >> +++ b/arch/tile/kernel/pci.c >> @@ -326,7 +326,8 @@ int __init pcibios_init(void) >> >> /* Configure the max_read_size and max_payload_size values. */ >> fixup_read_and_payload_sizes(); >> - >> + if (bus) >> + pci_bus_add_devices(bus); >> /* Record the I/O resources in the PCI controller structure. */ >> for (i = 0; i < TILE_NUM_PCIE; i++) { >> /* >> diff --git a/arch/tile/kernel/pci_gx.c b/arch/tile/kernel/pci_gx.c >> index e39f9c5..5f05a9a 100644 >> --- a/arch/tile/kernel/pci_gx.c >> +++ b/arch/tile/kernel/pci_gx.c >> @@ -903,7 +903,8 @@ int __init pcibios_init(void) >> * associated with the devices read in above. >> */ >> pci_assign_unassigned_resources(); >> - >> + if (bus) >> + pci_bus_add_devices(bus); >> /* Record the I/O resources in the PCI controller structure. */ >> for (i = 0; i < num_rc_controllers; i++) { >> struct pci_controller *controller = &pci_controllers[i]; >> diff --git a/arch/unicore32/kernel/pci.c b/arch/unicore32/kernel/pci.c >> index be0f261..0d4c563 100644 >> --- a/arch/unicore32/kernel/pci.c >> +++ b/arch/unicore32/kernel/pci.c >> @@ -270,11 +270,11 @@ static int __init pci_common_init(void) >> * Size the bridge windows. >> */ >> pci_bus_size_bridges(puv3_bus); >> - >> /* >> * Assign resources. >> */ >> pci_bus_assign_resources(puv3_bus); >> + pci_bus_add_devices(puv3_bus); >> } >> >> return 0; >> diff --git a/arch/x86/pci/common.c b/arch/x86/pci/common.c >> index 7b20bcc..b16632b 100644 >> --- a/arch/x86/pci/common.c >> +++ b/arch/x86/pci/common.c >> @@ -471,10 +471,12 @@ void pcibios_scan_root(int 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); >> - if (!bus) { >> - pci_free_resource_list(&resources); >> - kfree(sd); >> - } >> + if (bus) { >> + pci_bus_add_devices(bus); >> + return; >> + } >> + pci_free_resource_list(&resources); >> + kfree(sd); >> } >> >> void __init pcibios_set_cache_line_size(void) >> diff --git a/arch/xtensa/kernel/pci.c b/arch/xtensa/kernel/pci.c >> index 5b34033..c4b5b5d 100644 >> --- a/arch/xtensa/kernel/pci.c >> +++ b/arch/xtensa/kernel/pci.c >> @@ -185,6 +185,7 @@ static int __init pcibios_init(void) >> pci_controller_apertures(pci_ctrl, &resources); >> bus = pci_scan_root_bus(NULL, pci_ctrl->first_busno, >> pci_ctrl->ops, pci_ctrl, &resources); >> + pci_bus_add_devices(bus); >> pci_ctrl->bus = bus; >> pci_ctrl->last_busno = bus->busn_res.end; >> if (next_busno <= pci_ctrl->last_busno) >> diff --git a/drivers/pci/host/pci-xgene.c b/drivers/pci/host/pci-xgene.c >> index 9ecabfa..e7a4f66 100644 >> --- a/drivers/pci/host/pci-xgene.c >> +++ b/drivers/pci/host/pci-xgene.c >> @@ -634,7 +634,7 @@ static int xgene_pcie_probe_bridge(struct platform_device *pdev) >> bus = pci_scan_root_bus(&pdev->dev, 0, &xgene_pcie_ops, port, &res); >> if (!bus) >> return -ENOMEM; >> - >> + pci_bus_add_devices(bus); >> platform_set_drvdata(pdev, port); >> return 0; >> } >> diff --git a/drivers/pci/hotplug/ibmphp_core.c b/drivers/pci/hotplug/ibmphp_core.c >> index b486432..76ce157 100644 >> --- a/drivers/pci/hotplug/ibmphp_core.c >> +++ b/drivers/pci/hotplug/ibmphp_core.c >> @@ -740,7 +740,7 @@ static void ibm_unconfigure_device(struct pci_func *func) >> */ >> static u8 bus_structure_fixup(u8 busno) >> { >> - struct pci_bus *bus; >> + struct pci_bus *bus, *b; >> struct pci_dev *dev; >> u16 l; >> >> @@ -767,7 +767,9 @@ static u8 bus_structure_fixup(u8 busno) >> (l != 0x0000) && (l != 0xffff)) { >> debug("%s - Inside bus_structure_fixup()\n", >> __func__); >> - pci_scan_root_bus(NULL, busno, ibmphp_pci_bus->ops, NULL, NULL); >> + b = pci_scan_root_bus(NULL, busno, ibmphp_pci_bus->ops, NULL, NULL); >> + if (b) >> + pci_bus_add_devices(b); >> break; >> } >> } >> diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c >> index 0a02fc2..97711f3 100644 >> --- a/drivers/pci/probe.c >> +++ b/drivers/pci/probe.c >> @@ -2101,7 +2101,6 @@ struct pci_bus *pci_scan_root_bus(struct device *parent, int bus, >> if (!found) >> pci_bus_update_busn_res_end(b, max); >> >> - pci_bus_add_devices(b); >> return b; >> } >> EXPORT_SYMBOL(pci_scan_root_bus); >> -- >> 1.7.1 >> >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-pci" in >> the body of a message to majordomo@vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html >> >
diff --git a/arch/alpha/kernel/pci.c b/arch/alpha/kernel/pci.c index 076c35c..81251a5 100644 --- a/arch/alpha/kernel/pci.c +++ b/arch/alpha/kernel/pci.c @@ -349,6 +349,7 @@ common_init_pci(void) pci_assign_unassigned_resources(); pci_fixup_irqs(alpha_mv.pci_swizzle, alpha_mv.pci_map_irq); + pci_bus_add_devices(bus); } diff --git a/arch/alpha/kernel/sys_nautilus.c b/arch/alpha/kernel/sys_nautilus.c index 1047ab3..60fbd77 100644 --- a/arch/alpha/kernel/sys_nautilus.c +++ b/arch/alpha/kernel/sys_nautilus.c @@ -253,6 +253,7 @@ nautilus_init_pci(void) for the root bus, so just clear it. */ bus->self = NULL; pci_fixup_irqs(alpha_mv.pci_swizzle, alpha_mv.pci_map_irq); + pci_bus_add_devices(bus); } /* diff --git a/arch/frv/mb93090-mb00/pci-vdk.c b/arch/frv/mb93090-mb00/pci-vdk.c index efa5d65..85f87dc 100644 --- a/arch/frv/mb93090-mb00/pci-vdk.c +++ b/arch/frv/mb93090-mb00/pci-vdk.c @@ -316,6 +316,7 @@ void pcibios_fixup_bus(struct pci_bus *bus) int __init pcibios_init(void) { + struct pci_bus *bus = NULL; struct pci_ops *dir = NULL; LIST_HEAD(resources); @@ -383,12 +384,13 @@ 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); - pci_scan_root_bus(NULL, 0, pci_root_ops, NULL, &resources); - + bus = pci_scan_root_bus(NULL, 0, pci_root_ops, NULL, &resources); + if (!bus) + return -ENXIO; pcibios_irq_init(); pcibios_fixup_irqs(); pcibios_resource_survey(); - + pci_bus_add_devices(bus); return 0; } diff --git a/arch/ia64/sn/kernel/io_init.c b/arch/ia64/sn/kernel/io_init.c index 0b5ce82..1be65eb 100644 --- a/arch/ia64/sn/kernel/io_init.c +++ b/arch/ia64/sn/kernel/io_init.c @@ -271,7 +271,9 @@ sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus) if (bus == NULL) { kfree(res); kfree(controller); + return; } + pci_bus_add_devices(bus); } /* diff --git a/arch/m68k/coldfire/pci.c b/arch/m68k/coldfire/pci.c index 4d242fb..840a431 100644 --- a/arch/m68k/coldfire/pci.c +++ b/arch/m68k/coldfire/pci.c @@ -319,6 +319,7 @@ static int __init mcf_pci_init(void) pci_fixup_irqs(pci_common_swizzle, mcf_pci_map_irq); pci_bus_size_bridges(rootbus); pci_bus_assign_resources(rootbus); + pci_bus_add_devices(rootbus); return 0; } diff --git a/arch/microblaze/pci/pci-common.c b/arch/microblaze/pci/pci-common.c index 9037914..9ca7e3f 100644 --- a/arch/microblaze/pci/pci-common.c +++ b/arch/microblaze/pci/pci-common.c @@ -1344,8 +1344,8 @@ static void pcibios_scan_phb(struct pci_controller *hose) } bus->busn_res.start = hose->first_busno; hose->bus = bus; - hose->last_busno = bus->busn_res.end; + pci_bus_add_devices(bus); } static int __init pcibios_init(void) diff --git a/arch/mips/pci/pci.c b/arch/mips/pci/pci.c index 1bf60b1..f083688 100644 --- a/arch/mips/pci/pci.c +++ b/arch/mips/pci/pci.c @@ -113,6 +113,7 @@ static void pcibios_scanbus(struct pci_controller *hose) if (!pci_has_flag(PCI_PROBE_ONLY)) { pci_bus_size_bridges(bus); pci_bus_assign_resources(bus); + pci_bus_add_devices(bus); } } } diff --git a/arch/mn10300/unit-asb2305/pci.c b/arch/mn10300/unit-asb2305/pci.c index 6b4339f..011af54 100644 --- a/arch/mn10300/unit-asb2305/pci.c +++ b/arch/mn10300/unit-asb2305/pci.c @@ -345,6 +345,7 @@ void pcibios_fixup_bus(struct pci_bus *bus) */ static int __init pcibios_init(void) { + struct pci_bus *bus; resource_size_t io_offset, mem_offset; LIST_HEAD(resources); @@ -376,11 +377,13 @@ 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); - pci_scan_root_bus(NULL, 0, &pci_direct_ampci, NULL, &resources); - + bus = pci_scan_root_bus(NULL, 0, &pci_direct_ampci, NULL, &resources); + if (!bus) + return 0; pcibios_irq_init(); pcibios_fixup_irqs(); pcibios_resource_survey(); + pci_bus_add_devices(bus); return 0; } diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c index 2fa7b14..016ea48 100644 --- a/arch/s390/pci/pci.c +++ b/arch/s390/pci/pci.c @@ -755,7 +755,7 @@ static int zpci_scan_bus(struct zpci_dev *zdev) zpci_cleanup_bus_resources(zdev); return -EIO; } - + pci_bus_add_devices(zdev->bus); zdev->bus->max_bus_speed = zdev->max_bus_speed; return 0; } diff --git a/arch/sh/drivers/pci/pci.c b/arch/sh/drivers/pci/pci.c index 1bc09ee..efc1051 100644 --- a/arch/sh/drivers/pci/pci.c +++ b/arch/sh/drivers/pci/pci.c @@ -69,6 +69,7 @@ static void pcibios_scanbus(struct pci_channel *hose) pci_bus_size_bridges(bus); pci_bus_assign_resources(bus); + pci_bus_add_devices(bus); } else { pci_free_resource_list(&resources); } diff --git a/arch/sparc/kernel/leon_pci.c b/arch/sparc/kernel/leon_pci.c index 899b720..2971076 100644 --- a/arch/sparc/kernel/leon_pci.c +++ b/arch/sparc/kernel/leon_pci.c @@ -40,6 +40,7 @@ void leon_pci_init(struct platform_device *ofdev, struct leon_pci_info *info) /* Assign devices with resources */ pci_assign_unassigned_resources(); + pci_bus_add_devices(root_bus); } else { pci_free_resource_list(&resources); } diff --git a/arch/sparc/kernel/pcic.c b/arch/sparc/kernel/pcic.c index 64aafac..5457814 100644 --- a/arch/sparc/kernel/pcic.c +++ b/arch/sparc/kernel/pcic.c @@ -392,6 +392,8 @@ static void __init pcic_pbm_scan_bus(struct linux_pcic *pcic) pbm->pci_bus = pci_scan_root_bus(NULL, pbm->pci_first_busno, &pcic_ops, pbm, NULL); + if (pbm->pci_bus) + pci_bus_add_devices(pbm->pci_bus); #if 0 /* deadwood transplanted from sparc64 */ pci_fill_in_pbm_cookies(pbm->pci_bus, pbm, pbm->prom_node); pci_record_assignments(pbm, pbm->pci_bus); diff --git a/arch/tile/kernel/pci.c b/arch/tile/kernel/pci.c index 1f80a88..268423e 100644 --- a/arch/tile/kernel/pci.c +++ b/arch/tile/kernel/pci.c @@ -326,7 +326,8 @@ int __init pcibios_init(void) /* Configure the max_read_size and max_payload_size values. */ fixup_read_and_payload_sizes(); - + if (bus) + pci_bus_add_devices(bus); /* Record the I/O resources in the PCI controller structure. */ for (i = 0; i < TILE_NUM_PCIE; i++) { /* diff --git a/arch/tile/kernel/pci_gx.c b/arch/tile/kernel/pci_gx.c index e39f9c5..5f05a9a 100644 --- a/arch/tile/kernel/pci_gx.c +++ b/arch/tile/kernel/pci_gx.c @@ -903,7 +903,8 @@ int __init pcibios_init(void) * associated with the devices read in above. */ pci_assign_unassigned_resources(); - + if (bus) + pci_bus_add_devices(bus); /* Record the I/O resources in the PCI controller structure. */ for (i = 0; i < num_rc_controllers; i++) { struct pci_controller *controller = &pci_controllers[i]; diff --git a/arch/unicore32/kernel/pci.c b/arch/unicore32/kernel/pci.c index be0f261..0d4c563 100644 --- a/arch/unicore32/kernel/pci.c +++ b/arch/unicore32/kernel/pci.c @@ -270,11 +270,11 @@ static int __init pci_common_init(void) * Size the bridge windows. */ pci_bus_size_bridges(puv3_bus); - /* * Assign resources. */ pci_bus_assign_resources(puv3_bus); + pci_bus_add_devices(puv3_bus); } return 0; diff --git a/arch/x86/pci/common.c b/arch/x86/pci/common.c index 7b20bcc..b16632b 100644 --- a/arch/x86/pci/common.c +++ b/arch/x86/pci/common.c @@ -471,10 +471,12 @@ void pcibios_scan_root(int 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); - if (!bus) { - pci_free_resource_list(&resources); - kfree(sd); - } + if (bus) { + pci_bus_add_devices(bus); + return; + } + pci_free_resource_list(&resources); + kfree(sd); } void __init pcibios_set_cache_line_size(void) diff --git a/arch/xtensa/kernel/pci.c b/arch/xtensa/kernel/pci.c index 5b34033..c4b5b5d 100644 --- a/arch/xtensa/kernel/pci.c +++ b/arch/xtensa/kernel/pci.c @@ -185,6 +185,7 @@ static int __init pcibios_init(void) pci_controller_apertures(pci_ctrl, &resources); bus = pci_scan_root_bus(NULL, pci_ctrl->first_busno, pci_ctrl->ops, pci_ctrl, &resources); + pci_bus_add_devices(bus); pci_ctrl->bus = bus; pci_ctrl->last_busno = bus->busn_res.end; if (next_busno <= pci_ctrl->last_busno) diff --git a/drivers/pci/host/pci-xgene.c b/drivers/pci/host/pci-xgene.c index 9ecabfa..e7a4f66 100644 --- a/drivers/pci/host/pci-xgene.c +++ b/drivers/pci/host/pci-xgene.c @@ -634,7 +634,7 @@ static int xgene_pcie_probe_bridge(struct platform_device *pdev) bus = pci_scan_root_bus(&pdev->dev, 0, &xgene_pcie_ops, port, &res); if (!bus) return -ENOMEM; - + pci_bus_add_devices(bus); platform_set_drvdata(pdev, port); return 0; } diff --git a/drivers/pci/hotplug/ibmphp_core.c b/drivers/pci/hotplug/ibmphp_core.c index b486432..76ce157 100644 --- a/drivers/pci/hotplug/ibmphp_core.c +++ b/drivers/pci/hotplug/ibmphp_core.c @@ -740,7 +740,7 @@ static void ibm_unconfigure_device(struct pci_func *func) */ static u8 bus_structure_fixup(u8 busno) { - struct pci_bus *bus; + struct pci_bus *bus, *b; struct pci_dev *dev; u16 l; @@ -767,7 +767,9 @@ static u8 bus_structure_fixup(u8 busno) (l != 0x0000) && (l != 0xffff)) { debug("%s - Inside bus_structure_fixup()\n", __func__); - pci_scan_root_bus(NULL, busno, ibmphp_pci_bus->ops, NULL, NULL); + b = pci_scan_root_bus(NULL, busno, ibmphp_pci_bus->ops, NULL, NULL); + if (b) + pci_bus_add_devices(b); break; } } diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 0a02fc2..97711f3 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -2101,7 +2101,6 @@ struct pci_bus *pci_scan_root_bus(struct device *parent, int bus, if (!found) pci_bus_update_busn_res_end(b, max); - pci_bus_add_devices(b); return b; } EXPORT_SYMBOL(pci_scan_root_bus);
Rip out pci_bus_add_devices() from pci_scan_root_bus() for following reasons. 1. pci_scan_root_bus() means we only do the scan, we should not add pci busses. 2. A lots of drviers which use pci_scan_root_bus() call pci_bus_size_bridges(), pci_bus_assign_resources() after pci_scan_root_bus(). But strictly speaking pci_bus_add_devices() should be called after the resources assignment. Signed-off-by: Yijing Wang <wangyijing@huawei.com> --- arch/alpha/kernel/pci.c | 1 + arch/alpha/kernel/sys_nautilus.c | 1 + arch/frv/mb93090-mb00/pci-vdk.c | 8 +++++--- arch/ia64/sn/kernel/io_init.c | 2 ++ arch/m68k/coldfire/pci.c | 1 + arch/microblaze/pci/pci-common.c | 2 +- arch/mips/pci/pci.c | 1 + arch/mn10300/unit-asb2305/pci.c | 7 +++++-- arch/s390/pci/pci.c | 2 +- arch/sh/drivers/pci/pci.c | 1 + arch/sparc/kernel/leon_pci.c | 1 + arch/sparc/kernel/pcic.c | 2 ++ arch/tile/kernel/pci.c | 3 ++- arch/tile/kernel/pci_gx.c | 3 ++- arch/unicore32/kernel/pci.c | 2 +- arch/x86/pci/common.c | 10 ++++++---- arch/xtensa/kernel/pci.c | 1 + drivers/pci/host/pci-xgene.c | 2 +- drivers/pci/hotplug/ibmphp_core.c | 6 ++++-- drivers/pci/probe.c | 1 - 20 files changed, 39 insertions(+), 18 deletions(-)