Use pci_lock_hotplug()/pci_unlock_hotplug() to serialize PCI
hotplug operations related to ACPI root bridges.
Signed-off-by: Jiang Liu <jiang.liu@xxxxxxxxxx>
---
drivers/acpi/pci_root.c | 8 ++++++++
1 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index 24afd66..a8a3867 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -463,6 +463,8 @@ static int __devinit acpi_pci_root_add(struct acpi_device *device)
if (!root)
return -ENOMEM;
+ pci_lock_hotplug();
+
segment = 0;
status = acpi_evaluate_integer(device->handle, METHOD_NAME__SEG, NULL,
&segment);
@@ -627,12 +629,14 @@ static int __devinit acpi_pci_root_add(struct acpi_device *device)
driver->add(device->handle);
mutex_unlock(&acpi_pci_root_lock);
+ pci_unlock_hotplug();
return 0;
out_del_root:
list_del_rcu(&root->node);
mutex_unlock(&acpi_pci_root_lock);
+ pci_unlock_hotplug();
synchronize_rcu();
out_free:
kfree(root);
@@ -643,7 +647,9 @@ static int acpi_pci_root_start(struct acpi_device *device)
{
struct acpi_pci_root *root = acpi_driver_data(device);
+ pci_lock_hotplug();
pci_bus_add_devices(root->bus);
+ pci_unlock_hotplug();
return 0;
}
@@ -652,6 +658,7 @@ static int acpi_pci_root_remove(struct acpi_device *device, int type)
struct acpi_pci_root *root = acpi_driver_data(device);
struct acpi_pci_driver *driver;
+ pci_lock_hotplug();
mutex_lock(&acpi_pci_root_lock);
list_for_each_entry(driver, &acpi_pci_drivers, node)
@@ -675,6 +682,7 @@ static int acpi_pci_root_remove(struct acpi_device *device, int type)
out:
list_del_rcu(&root->node);
mutex_unlock(&acpi_pci_root_lock);
+ pci_unlock_hotplug();
synchronize_rcu();
kfree(root);
--
1.7.5.4
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