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2dc41281b1
linux/drivers/pci/hotplug
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Rafael J. Wysocki 2dc41281b1 ACPI / hotplug / PCI: Avoid doing too much for spurious notifies 
Sometimes we may get a spurious device check or bus check notify for
a hotplug device and in those cases we should avoid doing all of the
configuration work needed when something actually changes.  To that
end, check the return value of pci_scan_slot() in enable_slot() and
bail out early if it is 0.

This turns out to help reduce the amount of diagnostic output from
the ACPIPHP subsystem and speed up boot on at least one system that
generates multiple device check notifies for PCIe devices on the root
bus during boot.

Reported-and-tested-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-09-07 03:43:35 +02:00
..
acpi_pcihp.c module_param: make bool parameters really bool (drivers & misc) 2012-01-13 09:32:20 +10:30
acpiphp_core.c ACPI / hotplug / PCI: Consolidate slot disabling and ejecting 2013-07-23 04:00:25 +02:00
acpiphp_glue.c ACPI / hotplug / PCI: Avoid doing too much for spurious notifies 2013-09-07 03:43:35 +02:00
acpiphp_ibm.c Merge branch 'acpi-assorted' 2013-08-27 01:29:04 +02:00
acpiphp.h ACPI / hotplug / PCI: Get rid of unused constants in acpiphp.h 2013-07-23 04:00:27 +02:00
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 PCI: hotplug: Convert to be builtin only, not modular 2013-07-25 14:11:06 -06:00
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/pci/hotplug: Don't need to remove from EEH cache twice 2013-07-24 14:18:47 +10:00
rpadlpar_sysfs.c
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
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