Bjorn Helgaas 9fbbda5c8e ia64/PCI: Treat all host bridge Address Space Descriptors (even consumers) as windows ... Prior to c770cb4cb5 ("PCI: Mark invalid BARs as unassigned"), if we tried to claim a PCI BAR but could not find an upstream bridge window that matched it, we complained but still allowed the device to be enabled. c770cb4cb5 broke devices that previously worked (mptsas and igb in the case Tony reported, but it could be any devices) because it marks those BARs as IORESOURCE_UNSET, which makes pci_enable_device() complain and return failure: igb 0000:81:00.0: can't enable device: BAR 0 [mem size 0x00020000] not assigned igb: probe of 0000:81:00.0 failed with error -22 The underlying cause is an ACPI Address Space Descriptor for a PCI host bridge window that is marked as "consumer". This is a firmware defect: resources that are produced on the downstream side of a bridge should be marked "producer". But rejecting these BARs that we previously allowed is a functionality regression, and firmware has not used the producer/consumer bit consistently, so we can't rely on it anyway. Stop checking the producer/consumer bit, and assume all bridge Address Space Descriptors are for bridge windows. Note that this change does not affect I/O Port or Fixed Location I/O Port Descriptors, which are commonly used for the [io 0x0cf8-0x0cff] config access range. That range is a "consumer" range and should not be treated as a window. Fixes: c770cb4cb5 ("PCI: Mark invalid BARs as unassigned") Link: https://bugzilla.kernel.org/show_bug.cgi?id=96961 Reported-and-tested-by: Tony Luck <tony.luck@intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>		2015-04-21 15:29:39 -05:00
..
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	asm-generic: uaccess.h cleanup	2015-02-18 10:02:24 -08:00
kernel	ia64: use %*pb[l] to print bitmaps including cpumasks and nodemasks	2015-02-13 21:21:37 -08:00
lib	Fix common misspellings	2011-03-31 11:26:23 -03:00
mm	mm/hugetlb: reduce arch dependent code around follow_huge_*	2015-02-11 17:06:01 -08:00
oprofile	Disintegrate asm/system.h for IA64	2012-03-28 18:30:02 +01:00
pci	ia64/PCI: Treat all host bridge Address Space Descriptors (even consumers) as windows	2015-04-21 15:29:39 -05:00
scripts
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
Kconfig	More ACPI and power management updates for 3.19-rc1	2014-12-18 20:28:33 -08:00
Kconfig.debug
Makefile	KVM: ia64: remove	2014-11-20 11:08:33 +01:00
module.lds