[PATCH part5 4/7] ACPI, PCI: Stop pci devices before acpi_pci_driver remove calling

[Yinghai Lu <yinghai@kernel.org>]

During stop pci drivers, it still need to access ioapic and iommu.
So need to make sure those drivers need to be stop at first.

Also change the acpi_pci_drivers remove calling sequence to reverse.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
---
 drivers/acpi/pci_root.c |   11 +++++++----
 1 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index f3402df..59aa947 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -659,10 +659,6 @@ static int acpi_pci_root_remove(struct acpi_device *device, int type)
 
 	mutex_lock(&acpi_pci_root_lock);
 
-	list_for_each_entry(driver, &acpi_pci_drivers, node)
-		if (driver->remove)
-			driver->remove(root->device->handle);
-
 	/* that root bus could be removed already */
 	if (!pci_find_bus(root->segment, root->secondary.start)) {
 		dev_printk(KERN_DEBUG, &device->dev,
@@ -670,6 +666,13 @@ static int acpi_pci_root_remove(struct acpi_device *device, int type)
 		goto out;
 	}
 
+	/* stop normal pci drivers before we stop ioapic and dmar etc */
+	pci_stop_bus_devices(root->bus);
+
+	list_for_each_entry_reverse(driver, &acpi_pci_drivers, node)
+		if (driver->remove)
+			driver->remove(root->device->handle);
+
 	device_set_run_wake(root->bus->bridge, false);
 	pci_acpi_remove_bus_pm_notifier(device);
 
-- 
1.7.7