linux_dsm_epyc7002/drivers/pci
Mika Westerberg 7282059489 ACPI / hotplug / PCI: Relax the checking of _STA return values
The ACPI specification (ACPI 5.0A, Section 6.3.7) says:

 _STA may return bit 0 clear (not present) with bit 3 set (device is
 functional). This case is used to indicate a valid device for which
 no device driver should be loaded (for example, a bridge device.)
 Children of this device may be present and valid. OSPM should
 continue enumeration below a device whose _STA returns this bit
 combination.

Evidently, some BIOSes follow that and return 0x0A from _STA, which
causes problems to happen when they trigger bus check or device check
notifications for those devices too.  Namely, ACPIPHP thinks that they
are gone and may drop them, for example, if such a notification is
triggered during a resume from system suspend.

To fix that, modify ACPICA to regard devies as present and
functioning if _STA returns both the ACPI_STA_DEVICE_ENABLED
and ACPI_STA_DEVICE_FUNCTIONING bits set for them.

Reported-and-tested-by: Peter Wu <lekensteyn@gmail.com>
Cc: 3.12+ <stable@vger.kernel.org> # 3.12+
[rjw: Subject and changelog, minor code modifications]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-02-12 12:45:57 +01:00
..
host ARM: SoC cleanups for 3.14 2014-01-23 18:36:55 -08:00
hotplug ACPI / hotplug / PCI: Relax the checking of _STA return values 2014-02-12 12:45:57 +01:00
pcie Merge branch 'pci/dead-code' into next 2014-01-13 16:47:08 -07:00
access.c PCI: Remove unused pci_vpd_truncate() 2014-01-13 11:14:43 -07:00
ats.c PCI: Removed unused parts of Page Request Interface support 2014-01-10 14:00:47 -07:00
bus.c Merge branch 'pci/resource' into next 2014-01-10 14:23:15 -07:00
host-bridge.c PCI: Convert pcibios_resource_to_bus() to take a pci_bus, not a pci_dev 2013-12-21 10:06:10 -07:00
hotplug-pci.c PCI: hotplug: remove pci_do_scan_bus() 2012-06-13 15:42:27 -06:00
htirq.c pci: Fix files needing export.h for EXPORT_SYMBOL/THIS_MODULE 2011-10-31 19:31:22 -04:00
ioapic.c ACPI and power management updates for 3.14-rc1 2014-01-24 15:51:02 -08:00
iov.c PCI: Never treat a VF as a multifunction device 2014-01-10 10:05:26 -07:00
irq.c PCI: Fix whitespace, capitalization, and spelling errors 2013-11-14 11:28:18 -07:00
Kconfig PCI: Convert ioapic to be builtin only, not modular 2014-01-03 14:31:38 -07:00
Makefile PCI: Add Virtual Channel to save/restore support 2013-12-17 17:39:08 -07:00
msi.c Merge branch 'pci/msi' into next 2014-01-07 17:34:39 -07:00
of.c PCI: OF: Don't crash when bridge parent is NULL. 2011-08-19 08:51:37 -07:00
pci-acpi.c ACPI and power management updates for 3.14-rc1 2014-01-24 15:51:02 -08:00
pci-driver.c PCI: Disable Bus Master only on kexec reboot 2013-12-07 14:20:28 -07:00
pci-label.c ACPI and power management updates for 3.14-rc1 2014-01-24 15:51:02 -08:00
pci-stub.c PCI: Fix whitespace, capitalization, and spelling errors 2013-11-14 11:28:18 -07:00
pci-sysfs.c PCI: Add global pci_lock_rescan_remove() 2014-01-13 17:49:49 -07:00
pci.c PCI changes for the v3.14 merge window: 2014-01-22 16:39:28 -08:00
pci.h PCI: Make local functions static 2014-01-13 11:57:29 -07:00
probe.c Revert "PCI: Remove from bus_list and release resources in pci_release_dev()" 2014-02-01 10:24:31 -08:00
proc.c PCI: Fix whitespace, capitalization, and spelling errors 2013-11-14 11:28:18 -07:00
quirks.c PCI changes for the v3.14 merge window: 2014-01-22 16:39:28 -08:00
remove.c Revert "PCI: Remove from bus_list and release resources in pci_release_dev()" 2014-02-01 10:24:31 -08:00
rom.c PCI: Convert pcibios_resource_to_bus() to take a pci_bus, not a pci_dev 2013-12-21 10:06:10 -07:00
search.c PCI: Fix whitespace, capitalization, and spelling errors 2013-11-14 11:28:18 -07:00
setup-bus.c Merge branch 'pci/resource' into next 2014-01-10 14:23:15 -07:00
setup-irq.c PCI: Provide a default pcibios_update_irq() 2012-09-18 17:28:21 -06:00
setup-res.c PCI: Convert pcibios_resource_to_bus() to take a pci_bus, not a pci_dev 2013-12-21 10:06:10 -07:00
slot.c PCI: Remove unused pci_renumber_slot() 2014-01-13 11:14:44 -07:00
syscall.c PCI: Fix whitespace, capitalization, and spelling errors 2013-11-14 11:28:18 -07:00
vc.c PCI: Rename PCI_VC_PORT_REG1/2 to PCI_VC_PORT_CAP1/2 2013-12-17 17:49:39 -07:00
vpd.c pci: Fix files needing export.h for EXPORT_SYMBOL/THIS_MODULE 2011-10-31 19:31:22 -04:00
xen-pcifront.c Features: 2014-01-22 22:00:18 -08:00