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29ed1f29b6
linux_dsm_epyc7002/drivers/pci/hotplug
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Yinghai Lu 29ed1f29b6 PCI: pciehp: Fix null pointer deref when hot-removing SR-IOV device 
Hot-removing a device with SR-IOV enabled causes a null pointer dereference
in v3.9 and v3.10.

This is a regression caused by ba518e3c17 ("PCI: pciehp: Iterate over all
devices in slot, not functions 0-7").  When we iterate over the
bus->devices list, we first remove the PF, which also removes all the VFs
from the list.  Then the list iterator blows up because more than just the
current entry was removed from the list.

ac205b7bb7 ("PCI: make sriov work with hotplug remove") works around a
similar problem in pci_stop_bus_devices() by iterating over the list in
reverse, so the VFs are stopped and removed from the list first, before the
PF.

This patch changes pciehp_unconfigure_device() to iterate over the list in
reverse, too.

[bhelgaas: bugzilla, changelog]
Reference: https://bugzilla.kernel.org/show_bug.cgi?id=60604
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Yijing Wang <wangyijing@huawei.com>
CC: stable@vger.kernel.org	# v3.9+
2013-07-25 14:11:06 -06:00
..
acpi_pcihp.c module_param: make bool parameters really bool (drivers & misc) 2012-01-13 09:32:20 +10:30
acpiphp_core.c PCI: acpiphp: Do not use ACPI PCI subdriver mechanism 2013-04-12 16:52:01 -06:00
acpiphp_glue.c ACPI / dock / PCI: Synchronous handling of dock events for PCI devices 2013-06-24 11:22:53 +02:00
acpiphp_ibm.c module_param: make bool parameters really bool (drivers & misc) 2012-01-13 09:32:20 +10:30
acpiphp.h Merge branch 'pci/cleanup' into next 2013-04-17 10:31:34 -06:00
cpci_hotplug_core.c PCI: hotplug: ensure a consistent return value in error case 2012-07-16 09:25:56 -06:00
cpci_hotplug_pci.c PCI: cpcihp: Iterate over all devices in slot, not functions 0-7 2013-01-25 09:23:08 -07:00
cpci_hotplug.h PCI: Remove "extern" from function declarations 2013-04-17 10:21:17 -06:00
cpcihp_generic.c PCI/cpcihp: Use hotplug-safe pci_get_domain_bus_and_slot() 2012-09-12 14:13:59 -06:00
cpcihp_zt5550.c PCI: Remove __dev* markings 2012-11-28 13:16:47 -08:00
cpcihp_zt5550.h
cpqphp_core.c PCI: hotplug: ensure a consistent return value in error case 2012-07-16 09:25:56 -06:00
cpqphp_ctrl.c PCI: cpqphp: Cleanup and remove unreachable paths 2013-01-07 11:34:04 -07:00
cpqphp_nvram.c PCI Hotplug: cpqphp: fix comment style 2009-06-11 12:04:08 -07:00
cpqphp_nvram.h PCI: Remove "extern" from function declarations 2013-04-17 10:21:17 -06:00
cpqphp_pci.c PCI: cpqhp: use generic pci_hp_add_bridge() 2012-06-13 15:42:26 -06:00
cpqphp_sysfs.c cpqphp_sysfs: switch to fixed_size_llseek() 2013-06-29 12:57:52 +04:00
cpqphp.h PCI: Remove "extern" from function declarations 2013-04-17 10:21:17 -06:00
ibmphp_core.c PCI changes for the 3.6 merge window: 2012-07-24 16:17:07 -07:00
ibmphp_ebda.c pci: hotplug: Fix typo in pci 2012-07-24 12:59:30 +02:00
ibmphp_hpc.c PCI hotplug: ibmphp-hpc: semaphore cleanup 2010-10-15 13:09:48 -07:00
ibmphp_pci.c pci: hotplug: Fix typo in pci 2012-07-24 12:59:30 +02:00
ibmphp_res.c ibmphp: Rename add_range() to add_bus_range() to avoid conflict 2010-02-10 17:45:09 -08:00
ibmphp.h PCI: Remove "extern" from function declarations 2013-04-17 10:21:17 -06:00
Kconfig Finally eradicate CONFIG_HOTPLUG 2013-06-03 14:20:18 -07:00
Makefile s390/pci: PCI hotplug support via SCLP 2012-11-30 17:47:25 +01:00
pci_hotplug_core.c PCI: Remove __must_check from definitions 2013-04-17 10:20:58 -06:00
pciehp_acpi.c PCI: Use PCI_EXP_SLTCAP_PSN mask when extracting slot number 2013-04-15 14:30:44 -06:00
pciehp_core.c PCI changes for the v3.9 merge window: 2013-02-25 21:18:18 -08:00
pciehp_ctrl.c PCI: pciehp: Use per-slot workqueues to avoid deadlock 2013-01-12 13:56:33 -07:00
pciehp_hpc.c drivers: avoid format strings in names passed to alloc_workqueue() 2013-07-03 16:07:41 -07:00
pciehp_pci.c PCI: pciehp: Fix null pointer deref when hot-removing SR-IOV device 2013-07-25 14:11:06 -06:00
pciehp.h PCI: Remove "extern" from function declarations 2013-04-17 10:21:17 -06:00
pcihp_skeleton.c PCI: hotplug: ensure a consistent return value in error case 2012-07-16 09:25:56 -06:00
pcihp_slot.c PCI/hotplug: Use PCI Express Capability accessors 2012-08-23 10:11:11 -06:00
rpadlpar_core.c powerpc/eeh: Remove EEH PE for normal PCI hotplug 2012-09-18 15:32:23 +10:00
rpadlpar_sysfs.c PCI: introduce pci_slot 2008-06-10 14:37:03 -07:00
rpadlpar.h PCI: Remove "extern" from function declarations 2013-04-17 10:21:17 -06:00
rpaphp_core.c module_param: make bool parameters really bool (drivers & misc) 2012-01-13 09:32:20 +10:30
rpaphp_pci.c PCI hotplug: rpaphp: make debug var unique 2008-10-20 10:54:27 -07:00
rpaphp_slot.c headers: kobject.h redux 2011-01-10 08:51:44 -08:00
rpaphp.h PCI: Remove "extern" from function declarations 2013-04-17 10:21:17 -06:00
s390_pci_hpc.c s390/pci: remove pdev during unplug 2013-06-26 21:10:08 +02:00
sgi_hotplug.c PCI changes for the v3.9 merge window: 2013-02-25 21:18:18 -08:00
shpchp_core.c drivers: avoid format strings in names passed to alloc_workqueue() 2013-07-03 16:07:41 -07:00
shpchp_ctrl.c PCI: shpchp: Use per-slot workqueues to avoid deadlock 2013-01-14 10:23:22 -07:00
shpchp_hpc.c PCI hotplug: shpchp: don't blindly claim non-AMD 0x7450 device IDs 2011-11-14 09:43:14 -08:00
shpchp_pci.c PCI: shpchp: Iterate over all devices in slot, not functions 0-7 2013-01-25 09:23:08 -07:00
shpchp_sysfs.c PCI: Remove __must_check from definitions 2013-04-17 10:20:58 -06:00
shpchp.h PCI: Remove "extern" from function declarations 2013-04-17 10:21:17 -06:00