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| author | Rui Wang <rui.y.wang@intel.com> | 2016-08-17 16:00:34 +0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-08-18 11:45:18 +0200 |
| commit | 584c5c422f6c749ced1e0bc3c6837f650f64e1e1 (patch) | |
| tree | a4435a1214fa37c3d912955d50c77877bda4c95b /drivers/acpi/pci_root.c | |
| parent | fe7bd58f5d25d5d655b1da4a084cc4ef6f085fee (diff) | |
| download | linux-584c5c422f6c749ced1e0bc3c6837f650f64e1e1.tar.bz2 | |
x86/ioapic: Support hot-removal of IOAPICs present during boot
IOAPICs present during system boot aren't added to ioapic_list,
thus are unable to be hot-removed. Fix it by calling
acpi_ioapic_add() during root bus enumeration.
Signed-off-by: Rui Wang <rui.y.wang@intel.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: helgaas@kernel.org
Cc: linux-acpi@vger.kernel.org
Cc: linux-pci@vger.kernel.org
Cc: rjw@rjwysocki.net
Cc: tony.luck@intel.com
Link: http://lkml.kernel.org/r/1471420837-31003-3-git-send-email-rui.y.wang@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/acpi/pci_root.c')
| -rw-r--r-- | drivers/acpi/pci_root.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c index b07eda1e7b05..bf601d4df8cf 100644 --- a/drivers/acpi/pci_root.c +++ b/drivers/acpi/pci_root.c @@ -614,6 +614,16 @@ static int acpi_pci_root_add(struct acpi_device *device, if (hotadd) { pcibios_resource_survey_bus(root->bus); pci_assign_unassigned_root_bus_resources(root->bus); + /* + * This is only called for the hotadd case. For the boot-time + * case, we need to wait until after PCI initialization in + * order to deal with IOAPICs mapped in on a PCI BAR. + * + * This is currently x86-specific, because acpi_ioapic_add() + * is an empty function without CONFIG_ACPI_HOTPLUG_IOAPIC. + * And CONFIG_ACPI_HOTPLUG_IOAPIC depends on CONFIG_X86_IO_APIC + * (see drivers/acpi/Kconfig). + */ acpi_ioapic_add(root->device->handle); } |