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ACPI / hotplug / PCI: Use global PCI rescan-remove locking

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Multiple race conditions are possible between the ACPI-based PCI hotplug
(ACPIPHP) and the generic PCI bus rescan and device removal that can be
triggered via sysfs.

To avoid those race conditions make the ACPIPHP code use global PCI
rescan-remove locking.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Rafael J. Wysocki
2014-01-10 15:24:41 +01:00
committed by Bjorn Helgaas
parent 7a3bb55ebd
commit 9217a98467
3 changed files with 43 additions and 7 deletions
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5
drivers/pci/hotplug/acpiphp.h
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@@ -77,6 +77,8 @@ struct acpiphp_bridge {
/* PCI-to-PCI bridge device */
struct pci_dev *pci_dev;
bool is_going_away;
};
@@ -150,6 +152,7 @@ struct acpiphp_attention_info
/* slot flags */
#define SLOT_ENABLED (0x00000001)
#define SLOT_IS_GOING_AWAY (0x00000002)
/* function flags */
@@ -169,7 +172,7 @@ void acpiphp_unregister_hotplug_slot(struct acpiphp_slot *slot);
typedef int (*acpiphp_callback)(struct acpiphp_slot *slot, void *data);
int acpiphp_enable_slot(struct acpiphp_slot *slot);
int acpiphp_disable_and_eject_slot(struct acpiphp_slot *slot);
int acpiphp_disable_slot(struct acpiphp_slot *slot);
u8 acpiphp_get_power_status(struct acpiphp_slot *slot);
u8 acpiphp_get_attention_status(struct acpiphp_slot *slot);
u8 acpiphp_get_latch_status(struct acpiphp_slot *slot);