Youquan,Song 46256f83d0 PCI: AER: fix aer inject result in kernel oops ... If the BIOS does not export _OSC to allow OS take over the PCIe AER, the pcie aer driver will not initialize the aer service. However, the aer_inject driver does not check this scenario, which results in a kernel oops when injecting an aer error into OS. For example: BUG: unable to handle kernel NULL pointer dereference at 0000000000000350 IP: [<ffffffff812e08f7>] _spin_lock_irqsave+0xc/0x23 PGD 155c41067 PUD 157fe0067 PMD 0 Oops: 0002 [#1] SMP Pid: 5119, comm: aer-inject Not tainted 2.6.32-rc8-mce #2 RIP: 0010:[<ffffffff812e08f7>] [<ffffffff812e08f7>] _spin_lock_irqsave+0xc/0x23 RSP: 0018:ffff880157f81e28 EFLAGS: 00010096 RAX: 0000000000000296 RBX: 0000000000000000 RCX: 0000000000000100 RDX: 0000000000010000 RSI: 0000000000000246 RDI: 0000000000000350 RBP: ffff880157f81e28 R08: 0000000000000004 R09: ffff880157f81dac R10: ffff88015a666f60 R11: ffff88015a666f40 R12: ffff88015758cc00 R13: 0000000000000350 R14: 0000000000000000 R15: 0000000000000100 FS: 00007f4d4a66e6f0(0000) GS:ffff8800282e0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: 0000000000000350 CR3: 000000015661a000 CR4: 00000000000006e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process aer-inject (pid: 5119, threadinfo ffff880157f80000, task ffff8801585f4340) Stack: ffff880157f81e78 ffffffff811b1615 ffff880157f81e78 ffffffff81222823 Call Trace: [<ffffffff811b1615>] aer_irq+0x38/0x117 [<ffffffff81222823>] ? device_for_each_child+0x5f/0x6f [<ffffffffa00967bf>] aer_inject_write+0x409/0x45e [aer_inject] [<ffffffff810eb80e>] vfs_write+0xae/0x16a [<ffffffff810eb98e>] sys_write+0x47/0x6e [<ffffffff8100ba2b>] system_call_fastpath+0x16/0x1b RIP [<ffffffff812e08f7>] _spin_lock_irqsave+0xc/0x23 RSP <ffff880157f81e28> CR2: 0000000000000350 So check the _OSC before assuming that AER is available to the OS. Signed-off-by: Youquan, Song <youquan.song@intel.com> Acked-by: Ying, Huang <ying.huang@intel.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>		2010-01-04 08:31:46 -08:00
..
hotplug	PCI: change PCI nomenclature in drivers/pci/ (comment changes)	2009-12-16 13:37:53 -08:00
pcie	PCI: AER: fix aer inject result in kernel oops	2010-01-04 08:31:46 -08:00
.gitignore
access.c	PCI: Add pci_bus_set_ops	2009-06-16 14:29:33 -07:00
bus.c	PCI AER: support Multiple Error Received and no error source id	2009-06-16 14:30:13 -07:00
dmar.c	Merge git://git.infradead.org/iommu-2.6	2009-12-16 10:11:38 -08:00
hotplug-pci.c
hotplug.c
htirq.c	Merge branch 'x86/apic' into irq/numa	2009-05-12 12:17:36 +02:00
intel-iommu.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6	2009-12-30 13:13:24 -08:00
intr_remapping.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6	2009-12-30 13:13:24 -08:00
intr_remapping.h	intr-remap: generic support for remapping HPET MSIs	2009-08-27 23:33:20 +02:00
ioapic.c	PCI hotplug: move IOAPIC support from acpiphp to ioapic driver	2009-11-04 13:06:39 -08:00
iov.c	PCI: use pci_is_pcie() in pci core	2009-11-24 15:25:16 -08:00
iova.c	intel-iommu: Remove superfluous iova_alloc_lock from IOVA code	2009-07-15 08:17:02 +01:00
irq.c	PCI: struct device - replace bus_id with dev_name(), dev_set_name()	2009-01-07 11:12:23 -08:00
Kconfig	PCI: remove pci_find_slot from PCI_LEGACY config description	2009-11-04 13:06:42 -08:00
legacy.c	PCI: disable pci_find_device warnings when deprecated pci functions are enabled	2009-09-09 13:29:25 -07:00
Makefile	PCI hotplug: move IOAPIC support from acpiphp to ioapic driver	2009-11-04 13:06:39 -08:00
msi.c	PCI MSI: Style cleanups	2009-09-09 13:29:35 -07:00
msi.h	PCI MSI: shorten PCI_MSIX_ENTRY_* symbol names	2009-06-29 12:15:19 -07:00
pci-acpi.c	PCI/PM: Propagate wake-up enable for PCIe devices too	2009-12-16 13:37:49 -08:00
pci-driver.c	Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6	2009-09-16 07:49:54 -07:00
pci-stub.c	PCI: pci-stub: add pci_stub.ids parameter	2009-09-09 13:44:34 -07:00
pci-sysfs.c	PCI: show dma_mask bits in /sys	2009-12-04 15:47:50 -08:00
pci.c	PCI: Fix build if quirks are not enabled	2009-12-31 12:00:45 -08:00
pci.h	PCI: Fix build if quirks are not enabled	2009-12-31 12:00:45 -08:00
probe.c	PCI: add pci_request_acs	2009-12-04 16:19:24 -08:00
proc.c	PCI: define PCI resource names in an 'enum'	2009-01-07 11:13:01 -08:00
quirks.c	pci: avoid compiler warning in quirks.c	2009-12-31 16:44:43 -08:00
remove.c	PCI: eliminate redundant pci_stop_dev() call from pci_destroy_dev()	2009-06-11 12:04:19 -07:00
rom.c	PCI: fix rom.c kernel-doc warning	2009-02-13 12:01:56 -08:00
search.c	PCI: change PCI nomenclature in drivers/pci/ (comment changes)	2009-12-16 13:37:53 -08:00
setup-bus.c	PCI: Always set prefetchable base/limit upper32 registers	2009-12-04 15:52:43 -08:00
setup-irq.c
setup-res.c	PCI: improve discovery/configuration messages	2009-11-04 13:06:44 -08:00
slot.c	PCI: fix kernel-doc warnings	2009-06-29 12:13:56 -07:00
syscall.c	headers: smp_lock.h redux	2009-07-12 12:22:34 -07:00