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

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Message-Id: <1368550322-1045-12-git-send-email-jiang.liu@huawei.com>
Date:	Wed, 15 May 2013 00:51:56 +0800
From:	Jiang Liu <liuj97@...il.com>
To:	Bjorn Helgaas <bhelgaas@...gle.com>,
	Yinghai Lu <yinghai@...nel.org>
Cc:	Jiang Liu <jiang.liu@...wei.com>,
	"Rafael J . Wysocki" <rjw@...k.pl>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Gu Zheng <guz.fnst@...fujitsu.com>,
	Toshi Kani <toshi.kani@...com>,
	Myron Stowe <myron.stowe@...hat.com>,
	Yijing Wang <wangyijing@...wei.com>,
	Jiang Liu <liuj97@...il.com>, linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org, Len Brown <lenb@...nel.org>,
	linux-acpi@...r.kernel.org
Subject: [RFC PATCH v2, part 2 12/18] PCI, ACPI: use hotplug-safe iterators to walk PCI buses

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

Signed-off-by: Jiang Liu <jiang.liu@...wei.com>
Cc: Len Brown <lenb@...nel.org>
Cc: "Rafael J. Wysocki" <rjw@...k.pl>
Cc: linux-acpi@...r.kernel.org
Cc: linux-kernel@...r.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

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