Bjorn Helgaas 6f6f42466d PCI: shpchp: Manage SHPC unconditionally on non-ACPI systems ... An SHPC can be operated either by platform firmware or by the OS. The OS uses a host bridge ACPI _OSC method to negotiate for control of SHPC. If firmware wants to prevent an OS from operating an SHPC, it must supply an _OSC method that declines to grant SHPC ownership to the OS. If acpi_pci_find_root() returns NULL, it means there's no ACPI host bridge device (PNP0A03 or PNP0A08) and hence no _OSC method, so the OS is always allowed to manage the SHPC. Fix a NULL pointer dereference when CONFIG_ACPI=y but the current hardware/firmware platform doesn't support ACPI. In that case, acpi_get_hp_hw_control_from_firmware() is implemented but acpi_pci_find_root() returns NULL. Fixes: 90cc0c3cc7 ("PCI: shpchp: Add shpchp_is_native()") Link: https://lkml.kernel.org/r/20180621164715.28160-1-marc.zyngier@arm.com Reported-by: Marc Zyngier <marc.zyngier@arm.com> Tested-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>		2018-06-26 08:22:45 -05:00
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acpi_pcihp.c	PCI: shpchp: Manage SHPC unconditionally on non-ACPI systems	2018-06-26 08:22:45 -05:00
acpiphp_core.c
acpiphp_glue.c	ACPI / hotplug / PCI: Drop unnecessary parentheses	2018-06-04 12:08:06 -05:00
acpiphp_ibm.c	More ACPI updates for v4.16-rc1	2018-02-09 09:44:25 -08:00
acpiphp.h
cpci_hotplug_core.c
cpci_hotplug_pci.c
cpci_hotplug.h
cpcihp_generic.c
cpcihp_zt5550.c
cpcihp_zt5550.h
cpqphp_core.c
cpqphp_ctrl.c	PCI: cpqphp: Fix possible NULL pointer dereference	2018-02-28 14:35:54 -06:00
cpqphp_nvram.c
cpqphp_nvram.h
cpqphp_pci.c
cpqphp_sysfs.c
cpqphp.h
ibmphp_core.c	PCI: ibmphp: Fix use-before-set in get_max_bus_speed()	2018-04-20 12:49:24 -05:00
ibmphp_ebda.c
ibmphp_hpc.c
ibmphp_pci.c
ibmphp_res.c
ibmphp.h
Kconfig	PCI: shpchp: Convert SHPC to be builtin only	2018-06-02 00:18:28 -05:00
Makefile
pci_hotplug_core.c
pciehp_core.c	PCI: pciehp: Clear Presence Detect and Data Link Layer Status Changed on resume	2018-05-23 17:42:53 -05:00
pciehp_ctrl.c
pciehp_hpc.c	Merge branch 'pci/hotplug'	2018-06-06 16:10:10 -05:00
pciehp_pci.c
pciehp.h	PCI: pciehp: Clear Presence Detect and Data Link Layer Status Changed on resume	2018-05-23 17:42:53 -05:00
pcihp_skeleton.c
pnv_php.c	PCI: pnv_php: Add missing of_node_put()	2018-05-23 16:48:37 -05:00
rpadlpar_core.c
rpadlpar_sysfs.c
rpadlpar.h
rpaphp_core.c
rpaphp_pci.c
rpaphp_slot.c
rpaphp.h
s390_pci_hpc.c
sgi_hotplug.c
shpchp_core.c	PCI: shpchp: Add shpchp_is_native()	2018-06-04 12:08:06 -05:00
shpchp_ctrl.c	PCI: shpchp: Fix AMD POGO identification	2018-06-04 12:07:31 -05:00
shpchp_hpc.c
shpchp_pci.c
shpchp_sysfs.c
shpchp.h	PCI: shpchp: Add shpchp_is_native()	2018-06-04 12:08:06 -05:00