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
..
boot	* Avoid garbage names in efivarfs due to buggy firmware by zero'ing	2015-05-06 08:30:24 +02:00
configs
crypto	crypto: x86/sha512_ssse3 - fixup for asm function prototype change	2015-04-24 20:09:01 +08:00
ia32	x86_64, asm: Work around AMD SYSRET SS descriptor attribute issue	2015-04-26 17:57:38 -07:00
include	This pull request includes a fix for two oopses, one on PPC	2015-05-21 20:15:16 -07:00
kernel	perf/x86/rapl: Enable Broadwell-U RAPL support	2015-05-11 11:52:30 +02:00
kvm	kvm/fpu: Enable eager restore kvm FPU for MPX	2015-05-20 12:30:26 +02:00
lguest	Some virtio internal cleanups, a new virtio device "virtio input", and	2015-04-22 10:55:06 -07:00
lib	x86: fix special __probe_kernel_write() tail zeroing case	2015-04-24 06:58:27 -07:00
math-emu
mm	Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2015-05-06 10:57:37 -07:00
net	x86: bpf_jit: fix FROM_BE16 and FROM_LE16/32 instructions	2015-05-12 23:13:08 -04:00
oprofile
pci	PCI / ACPI: Do not set ACPI companions for host bridges with parents	2015-05-28 01:39:53 +02:00
platform
power
purgatory
realmode
syscalls
tools
um
vdso	x86/vdso: Fix 'make bzImage' on older distros	2015-05-11 10:25:02 +02:00
video
xen	hypervisor/x86/xen: Unset X86_BUG_SYSRET_SS_ATTRS on Xen PV guests	2015-05-05 18:27:43 +01:00
.gitignore
Kbuild
Kconfig	Initial ACPI support for arm64:	2015-04-24 08:23:45 -07:00
Kconfig.cpu
Kconfig.debug
Makefile
Makefile_32.cpu
Makefile.um