[PATCH 17/23] PCI, ACPI: make acpi_pci_root_remove remove pci root bus too

[Yinghai Lu <yinghai@kernel.org>]

it will call new added pci_stop_and_remove_bus() to stop/remove pci root bus.

also checking if that pci_root_bus get removed already in bus remove in /sys

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: Len Brown <lenb@kernel.org>
Cc: linux-acpi@vger.kernel.org
---
 drivers/acpi/pci_root.c |   14 ++++++++++++++
 1 files changed, 14 insertions(+), 0 deletions(-)

diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index 7aff631..b38e347 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -643,10 +643,24 @@ static int acpi_pci_root_remove(struct acpi_device *device, int type)
 {
 	struct acpi_pci_root *root = acpi_driver_data(device);
 
+	/* that root bus could be removed already */
+	if (!pci_find_bus(root->segment, root->secondary.start)) {
+		dev_printk(KERN_DEBUG, &device->dev,
+		  "freeing acpi_pci_root, but pci root bus was removed before");
+		goto out;
+	}
+
 	device_set_run_wake(root->bus->bridge, false);
 	pci_acpi_remove_bus_pm_notifier(device);
 
+	dev_printk(KERN_DEBUG, &device->dev,
+		"freeing acpi_pci_root, will remove pci root bus at first");
+	pci_stop_and_remove_bus(root->bus);
+
+out:
+	list_del(&root->node);
 	kfree(root);
+
 	return 0;
 }
 
-- 
1.7.7