[RFC PATCH v2, part 2 12/18] PCI, ACPI: use hotplug-safe iterators to walk PCI buses

[Jiang Liu <liuj97@gmail.com>]

Enhance ACPI reset drvier to use hotplug-safe iterators to walk PCI buses.

Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Cc: Len Brown <lenb@kernel.org>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: linux-acpi@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
---
 drivers/acpi/reboot.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/acpi/reboot.c b/drivers/acpi/reboot.c
index a6c77e8b..532dd6d 100644
--- a/drivers/acpi/reboot.c
+++ b/drivers/acpi/reboot.c
@@ -33,7 +33,7 @@ void acpi_reboot(void)
 	switch (rr->space_id) {
 	case ACPI_ADR_SPACE_PCI_CONFIG:
 		/* The reset register can only live on bus 0. */
-		bus0 = pci_find_bus(0, 0);
+		bus0 = pci_get_bus(0, 0);
 		if (!bus0)
 			return;
 		/* Form PCI device/function pair. */
@@ -43,6 +43,7 @@ void acpi_reboot(void)
 		/* Write the value that resets us. */
 		pci_bus_write_config_byte(bus0, devfn,
 				(rr->address & 0xffff), reset_value);
+		pci_bus_put(bus0);
 		break;
 
 	case ACPI_ADR_SPACE_SYSTEM_MEMORY:
-- 
1.8.1.2