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    Subject[PATCH v2 29/37] PCI, ACPI: Add acpi_pci_root_rescan()
    Date
    It will rescan all acpi pci root if related pci root bus get removed before.

    Signed-off-by: Yinghai <yinghai@kernel.org>
    Cc: Len Brown <lenb@kernel.org>
    Cc: linux-acpi@vger.kernel.org
    ---
    drivers/acpi/pci_root_hp.c | 17 +++++++++++++++++
    include/linux/pci-acpi.h | 7 +++++++
    2 files changed, 24 insertions(+), 0 deletions(-)

    diff --git a/drivers/acpi/pci_root_hp.c b/drivers/acpi/pci_root_hp.c
    index b453181..ca73d51 100644
    --- a/drivers/acpi/pci_root_hp.c
    +++ b/drivers/acpi/pci_root_hp.c
    @@ -268,3 +268,20 @@ static int __init acpi_pci_root_hp_init(void)
    }

    subsys_initcall(acpi_pci_root_hp_init);
    +
    +static acpi_status
    +rescan_root_bridge(acpi_handle handle, u32 lvl, void *context, void **rv)
    +{
    + if (!acpi_is_root_bridge(handle))
    + return AE_OK;
    +
    + handle_root_bridge_insertion(handle);
    +
    + return AE_OK;
    +}
    +
    +void acpi_pci_root_rescan(void)
    +{
    + acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
    + ACPI_UINT32_MAX, rescan_root_bridge, NULL, NULL, NULL);
    +}
    diff --git a/include/linux/pci-acpi.h b/include/linux/pci-acpi.h
    index 4462350..ac93634 100644
    --- a/include/linux/pci-acpi.h
    +++ b/include/linux/pci-acpi.h
    @@ -35,6 +35,13 @@ static inline acpi_handle acpi_pci_get_bridge_handle(struct pci_bus *pbus)
    return acpi_get_pci_rootbridge_handle(pci_domain_nr(pbus),
    pbus->number);
    }
    +
    +void acpi_pci_root_rescan(void);
    +
    +#else
    +
    +static inline void acpi_pci_root_rescan(void) { }
    +
    #endif

    #ifdef CONFIG_ACPI_APEI
    --
    1.7.7


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