WSL2-Linux-Kernel/drivers/pci
Yinghai Lu 3f327e39b4 PCI: acpiphp: Re-enumerate devices when host bridge receives Bus Check
When a PCI host bridge device receives a Bus Check notification, we
must re-enumerate starting with the bridge to discover changes (devices
that have been added or removed).

Prior to 668192b678 ("PCI: acpiphp: Move host bridge hotplug to
pci_root.c"), this happened in _handle_hotplug_event_bridge().  After that
commit, _handle_hotplug_event_bridge() is not installed for host bridges,
and the host bridge notify handler, _handle_hotplug_event_root() did not
re-enumerate.

This patch adds re-enumeration to _handle_hotplug_event_root().

This fixes cases where we don't notice the addition or removal of
PCI devices, e.g., the PCI-to-USB ExpressCard in the bugzilla below.

[bhelgaas: changelog, references]
Reference: https://lkml.kernel.org/r/CAAh6nkmbKR3HTqm5ommevsBwhL_u0N8Rk7Wsms_LfP=nBgKNew@mail.gmail.com
Reference: https://bugzilla.kernel.org/show_bug.cgi?id=57961
Reported-by: Gavin Guo <tuffkidtt@gmail.com>
Tested-by: Gavin Guo <tuffkidtt@gmail.com>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Jiang Liu <jiang.liu@huawei.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
CC: stable@vger.kernel.org	# v3.9+
2013-05-17 14:12:06 -06:00
..
hotplug PCI: acpiphp: Re-enumerate devices when host bridge receives Bus Check 2013-05-17 14:12:06 -06:00
pcie PCI changes for the v3.10 merge window: 2013-04-29 09:30:25 -07:00
Kconfig PCI: Drop bogus default from ARCH_SUPPORTS_MSI 2012-09-10 16:49:52 -06:00
Makefile PCI: Always build setup-bus when PCI is enabled 2012-11-28 13:00:58 -08:00
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: Delay final fixups until resources are assigned 2013-05-07 14:35:44 -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 changes for the v3.8 merge window: 2012-12-13 12:14:47 -08:00
iov.c pci: Add SRIOV helper function to determine if VFs are assigned to guest 2013-04-24 19:31:58 -07:00
irq.c PCI: Convert dev_printk(KERN_<LEVEL> to dev_<level>( 2012-11-07 15:24:18 -07:00
msi.c PCI: Set ->mask_pos correctly 2013-04-30 08:49:19 -07:00
of.c PCI: OF: Don't crash when bridge parent is NULL. 2011-08-19 08:51:37 -07:00
pci-acpi.c PCI changes for the v3.10 merge window: 2013-04-29 09:30:25 -07:00
pci-driver.c PCI: Don't try to disable Bus Master on disconnected PCI devices 2013-04-02 18:03:09 -06:00
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 PCI: Use vma_pages() to replace (vm_end - vm_start) >> PAGE_SHIFT 2013-04-15 14:30:44 -06:00
pci.c Merge branch 'pci/rafael-pm' into next 2013-04-17 10:43:16 -06:00
pci.h PCI: Remove "extern" from function declarations 2013-04-17 10:21:17 -06:00
probe.c PCI updates for v3.10: 2013-05-09 10:21:44 -07:00
proc.c proc: Supply a function to remove a proc entry by PDE 2013-05-01 17:29:46 -04:00
quirks.c PCI: Clean up quirk_io_region 2013-04-15 14:30:44 -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: Warn about failures instead of "must_check" functions 2013-04-17 10:21:12 -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 headers: smp_lock.h redux 2009-07-12 12:22:34 -07:00
vpd.c pci: Fix files needing export.h for EXPORT_SYMBOL/THIS_MODULE 2011-10-31 19:31:22 -04:00
xen-pcifront.c PCI changes for the v3.8 merge window: 2012-12-13 12:14:47 -08:00