On Mon, Feb 03, 2020 at 07:35:16PM +1100, Oliver O'Halloran wrote: > Move creating the EEH specific sysfs files into eeh_add_device_late() > rather than being open-coded all over the place. Calling the function is > generally done immediately after calling eeh_add_device_late() anyway. The > two cases where it's not done there (OF based PCI probing and the pseries > VFs) don't seem to have any issues with the re-ordering. I haven't tested it explicitly, but I suspect the re-ordering will actually improve things: in some error cases it will no longer add sysfs files for devices that have failed to init, because bailing out in eeh_add_device_late() (or eeh_probve_device()) will now prevent eeh_sysfs_add_device() from being called. Nice cleanup. Reviewed-by: Sam Bobroff > Signed-off-by: Oliver O'Halloran > --- > arch/powerpc/include/asm/eeh.h | 3 --- > arch/powerpc/kernel/eeh.c | 24 +----------------------- > arch/powerpc/kernel/of_platform.c | 3 --- > arch/powerpc/kernel/pci-common.c | 3 --- > arch/powerpc/platforms/powernv/eeh-powernv.c | 1 - > arch/powerpc/platforms/pseries/eeh_pseries.c | 3 +-- > 6 files changed, 2 insertions(+), 35 deletions(-) > > diff --git a/arch/powerpc/include/asm/eeh.h b/arch/powerpc/include/asm/eeh.h > index 6f9b2a1..5a34907 100644 > --- a/arch/powerpc/include/asm/eeh.h > +++ b/arch/powerpc/include/asm/eeh.h > @@ -305,7 +305,6 @@ void eeh_add_device_early(struct pci_dn *); > void eeh_add_device_tree_early(struct pci_dn *); > void eeh_add_device_late(struct pci_dev *); > void eeh_add_device_tree_late(struct pci_bus *); > -void eeh_add_sysfs_files(struct pci_bus *); > void eeh_remove_device(struct pci_dev *); > int eeh_unfreeze_pe(struct eeh_pe *pe); > int eeh_pe_reset_and_recover(struct eeh_pe *pe); > @@ -368,8 +367,6 @@ static inline void eeh_add_device_late(struct pci_dev *dev) { } > > static inline void eeh_add_device_tree_late(struct pci_bus *bus) { } > > -static inline void eeh_add_sysfs_files(struct pci_bus *bus) { } > - > static inline void eeh_remove_device(struct pci_dev *dev) { } > > #define EEH_POSSIBLE_ERROR(val, type) (0) > diff --git a/arch/powerpc/kernel/eeh.c b/arch/powerpc/kernel/eeh.c > index 17cb3e9..0878912 100644 > --- a/arch/powerpc/kernel/eeh.c > +++ b/arch/powerpc/kernel/eeh.c > @@ -1210,6 +1210,7 @@ void eeh_add_device_late(struct pci_dev *dev) > dev->dev.archdata.edev = edev; > > eeh_addr_cache_insert_dev(dev); > + eeh_sysfs_add_device(dev); > } > > /** > @@ -1238,29 +1239,6 @@ void eeh_add_device_tree_late(struct pci_bus *bus) > EXPORT_SYMBOL_GPL(eeh_add_device_tree_late); > > /** > - * eeh_add_sysfs_files - Add EEH sysfs files for the indicated PCI bus > - * @bus: PCI bus > - * > - * This routine must be used to add EEH sysfs files for PCI > - * devices which are attached to the indicated PCI bus. The PCI bus > - * is added after system boot through hotplug or dlpar. > - */ > -void eeh_add_sysfs_files(struct pci_bus *bus) > -{ > - struct pci_dev *dev; > - > - list_for_each_entry(dev, &bus->devices, bus_list) { > - eeh_sysfs_add_device(dev); > - if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) { > - struct pci_bus *subbus = dev->subordinate; > - if (subbus) > - eeh_add_sysfs_files(subbus); > - } > - } > -} > -EXPORT_SYMBOL_GPL(eeh_add_sysfs_files); > - > -/** > * eeh_remove_device - Undo EEH setup for the indicated pci device > * @dev: pci device to be removed > * > diff --git a/arch/powerpc/kernel/of_platform.c b/arch/powerpc/kernel/of_platform.c > index 427fc22..cb68800 100644 > --- a/arch/powerpc/kernel/of_platform.c > +++ b/arch/powerpc/kernel/of_platform.c > @@ -86,9 +86,6 @@ static int of_pci_phb_probe(struct platform_device *dev) > /* Add probed PCI devices to the device model */ > pci_bus_add_devices(phb->bus); > > - /* sysfs files should only be added after devices are added */ > - eeh_add_sysfs_files(phb->bus); > - So for this case, the sysfs files are added by pci_bus_add_devices(), via... pci_bus_add_devices() (loops over devices) -> pci_bus_add_device() -> pcibios_bus_add_device() -> ppc_md.pcibios_bus_add_device() -> {pseries,pnv}_pcibios_bus_add_device() -> eeh_add_device_late() -> eeh_sysfs_add_device(). > return 0; > } > > diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c > index c6c0341..3d2b1cf 100644 > --- a/arch/powerpc/kernel/pci-common.c > +++ b/arch/powerpc/kernel/pci-common.c > @@ -1404,9 +1404,6 @@ void pcibios_finish_adding_to_bus(struct pci_bus *bus) > > /* Add new devices to global lists. Register in proc, sysfs. */ > pci_bus_add_devices(bus); > - > - /* sysfs files should only be added after devices are added */ > - eeh_add_sysfs_files(bus); As above. > } > EXPORT_SYMBOL_GPL(pcibios_finish_adding_to_bus); > > diff --git a/arch/powerpc/platforms/powernv/eeh-powernv.c b/arch/powerpc/platforms/powernv/eeh-powernv.c > index 6f300ab..ef727ec 100644 > --- a/arch/powerpc/platforms/powernv/eeh-powernv.c > +++ b/arch/powerpc/platforms/powernv/eeh-powernv.c > @@ -48,7 +48,6 @@ void pnv_pcibios_bus_add_device(struct pci_dev *pdev) > dev_dbg(&pdev->dev, "EEH: Setting up device\n"); > eeh_add_device_early(pdn); > eeh_add_device_late(pdev); > - eeh_sysfs_add_device(pdev); So for this case, the sysfs files are added by eeh_add_device_late(), via... eeh_add_device_late() -> eeh_sysfs_add_device(). > } > > static int pnv_eeh_init(void) > diff --git a/arch/powerpc/platforms/pseries/eeh_pseries.c b/arch/powerpc/platforms/pseries/eeh_pseries.c > index 893ba3f..95bbf91 100644 > --- a/arch/powerpc/platforms/pseries/eeh_pseries.c > +++ b/arch/powerpc/platforms/pseries/eeh_pseries.c > @@ -68,7 +68,6 @@ void pseries_pcibios_bus_add_device(struct pci_dev *pdev) > } > #endif > eeh_add_device_early(pdn); > - eeh_add_device_late(pdev); > #ifdef CONFIG_PCI_IOV > if (pdev->is_virtfn) { > struct eeh_dev *edev = pdn_to_eeh_dev(pdn); > @@ -78,7 +77,7 @@ void pseries_pcibios_bus_add_device(struct pci_dev *pdev) > eeh_add_to_parent_pe(edev); /* Add as VF PE type */ > } > #endif > - eeh_sysfs_add_device(pdev); > + eeh_add_device_late(pdev); This is just a re-ordering. > } > > /* > -- > 2.9.5 >