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2dc41281b1
linux/drivers/pci
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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
..
host PCI: mvebu: Disable prefetchable memory support in PCI-to-PCI bridge 2013-08-01 14:47:54 -06:00
hotplug ACPI / hotplug / PCI: Avoid doing too much for spurious notifies 2013-09-07 03:43:35 +02:00
pcie PCI: pciehp: Convert pciehp to be builtin only, not modular 2013-07-26 07:32:12 -06:00
access.c PCI: Fix PCI Express Capability accessors for PCI_EXP_FLAGS 2013-02-15 11:46:24 -07:00
ats.c Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci 2012-01-11 18:50:26 -08:00
bus.c PCI: Introduce pci_bus_{get|put}() to manage PCI bus reference count 2013-05-27 16:22:09 -06:00
host-bridge.c PCI: add host bridge release support 2012-04-30 14:52:43 -06:00
hotplug-pci.c PCI: hotplug: remove pci_do_scan_bus() 2012-06-13 15:42:27 -06:00
htirq.c pci: Fix files needing export.h for EXPORT_SYMBOL/THIS_MODULE 2011-10-31 19:31:22 -04:00
ioapic.c PCI: Convert ioapic.c to module_pci_driver 2013-05-27 17:05:28 -06:00
iov.c Merge branch 'pci/jiang-bus-lock-v3' into next 2013-06-14 17:47:46 -06:00
irq.c PCI: Convert dev_printk(KERN_<LEVEL> to dev_<level>( 2012-11-07 15:24:18 -07:00
Kconfig ARM SoC specific changes 2013-07-02 13:43:38 -07:00
Makefile pci: PCIe driver for Marvell Armada 370/XP systems 2013-05-20 19:18:44 +00:00
msi.c PCI: Allocate only as many MSI vectors as requested by driver 2013-05-28 11:31:16 -06:00
of.c PCI: OF: Don't crash when bridge parent is NULL. 2011-08-19 08:51:37 -07:00
pci-acpi.c Merge branch 'acpi-pci-hotplug' 2013-08-27 01:26:37 +02:00
pci-driver.c PM / Runtime: Rework the "runtime idle" helper routine 2013-06-03 21:49:52 +02:00
pci-label.c switch ->is_visible() to returning umode_t 2012-01-03 22:54:55 -05:00
pci-stub.c PCI: Convert dev_printk(KERN_<LEVEL> to dev_<level>( 2012-11-07 15:24:18 -07:00
pci-sysfs.c Merge branch 'pci/jiang-iov-fixes' into next 2013-06-05 12:27:19 -06:00
pci.c pci: add pcibios_release_device 2013-06-26 21:10:05 +02:00
pci.h PCI / ACPI: Use boot-time resource allocation rules during hotplug 2013-06-23 01:01:35 +02:00
probe.c pci: add pcibios_release_device 2013-06-26 21:10:05 +02:00
proc.c pci/proc: switch to fixed_size_llseek() 2013-06-29 12:57:48 +04:00
quirks.c Merge branch 'pci/misc' into next 2013-06-26 15:55:52 -06:00
remove.c PCI: Add pcibios hooks for adding and removing PCI buses 2013-04-12 15:38:25 -06:00
rom.c PCI: Add PCI ROM helper for platform-provided ROM images 2013-03-26 17:19:41 -06:00
search.c PCI: Fix reference count leak in pci_dev_present() 2013-01-25 13:49:27 -07:00
setup-bus.c PCI: Retry allocation of only the resource type that failed 2013-07-26 07:32:20 -06:00
setup-irq.c PCI: Provide a default pcibios_update_irq() 2012-09-18 17:28:21 -06:00
setup-res.c PCI: Remove unused variables 2013-04-15 10:56:27 -06:00
slot.c PCI: Warn about failures instead of "must_check" functions 2013-04-17 10:21:12 -06:00
syscall.c
vpd.c pci: Fix files needing export.h for EXPORT_SYMBOL/THIS_MODULE 2011-10-31 19:31:22 -04:00
xen-pcifront.c xen/pcifront: Deal with toolstack missing 'XenbusStateClosing' state. 2013-06-14 12:28:59 -04:00