Rafael J. Wysocki dc4fdaf0e4 PCI / ACPI: Do not set ACPI companions for host bridges with parents ... Commit 97badf873a (device property: Make it possible to use secondary firmware nodes) uncovered a bug in the x86 (and ia64) PCI host bridge initialization code that assumes bridge->bus->sysdata to always point to a struct pci_sysdata object which need not be the case (in particular, the Xen PCI frontend driver sets it to point to a different data type). If it is not the case, an incorrect pointer (or a piece of data that is not a pointer at all) will be passed to ACPI_COMPANION_SET() and that may cause interesting breakage to happen going forward. To work around this problem use the observation that the ACPI host bridge initialization always passes NULL as parent to pci_create_root_bus(), so if pcibios_root_bridge_prepare() sees a non-NULL parent of the bridge, it should not attempt to set an ACPI companion for it, because that means that pci_create_root_bus() has been called by someone else. Fixes: 97badf873a (device property: Make it possible to use secondary firmware nodes) Reported-and-tested-by: Sander Eikelenboom <linux@eikelenboom.it> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com>		2015-05-28 01:39:53 +02:00
..
configs	[IA64] refresh arch/ia64/configs/* using "make savedefconfig"	2014-09-23 11:09:29 -07:00
dig	Disintegrate asm/system.h for IA64	2012-03-28 18:30:02 +01:00
hp	ACPI / ia64 / sba_iommu: Restore the working initialization ordering	2014-06-16 22:33:20 +02:00
include	This is the final removal (after several years!) of the obsolete cpus_*	2015-04-20 10:19:03 -07:00
kernel	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2015-04-26 17:22:07 -07:00
lib	Fix common misspellings	2011-03-31 11:26:23 -03:00
mm	ia64: Remove Linux/x86 exec domain support	2015-04-12 20:58:23 +02:00
oprofile	Disintegrate asm/system.h for IA64	2012-03-28 18:30:02 +01:00
pci	PCI / ACPI: Do not set ACPI companions for host bridges with parents	2015-05-28 01:39:53 +02:00
scripts	scripts: change scripts to use system python instead of env	2010-02-02 14:33:56 +01:00
sn	PCI: Assign resources before drivers claim devices (pci_scan_root_bus())	2015-03-19 10:17:13 -05:00
uv	ia64: change to new flag variables	2011-03-17 14:02:56 +01:00
install.sh	kbuild: use INSTALLKERNEL to select customized installkernel script	2009-09-20 12:18:14 +02:00
Kconfig	Initial ACPI support for arm64:	2015-04-24 08:23:45 -07:00
Kconfig.debug
Makefile	KVM: ia64: remove	2014-11-20 11:08:33 +01:00
module.lds