From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from rcsinet15.oracle.com ([148.87.113.117]:33400 "EHLO rcsinet15.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965067Ab2J3RnT (ORCPT ); Tue, 30 Oct 2012 13:43:19 -0400 From: Yinghai Lu To: Bjorn Helgaas , Len Brown , Taku Izumi , Jiang Liu Cc: linux-pci@vger.kernel.org, linux-acpi@vger.kernel.org, Yinghai Lu Subject: [PATCH 5/8] PCI: Add pci_stop/remove_root_bus() Date: Tue, 30 Oct 2012 10:42:42 -0700 Message-Id: <1351618965-16761-6-git-send-email-yinghai@kernel.org> In-Reply-To: <1351618965-16761-1-git-send-email-yinghai@kernel.org> References: <20121030040237.GA10472@google.com> <1351618965-16761-1-git-send-email-yinghai@kernel.org> Sender: linux-pci-owner@vger.kernel.org List-ID: It supports both pci root bus and pci bus under pci bridge. -v2: clear pci_bridge's subordinate. -v3: only handle root bus. and also put Jiang's get/put pair in -v4: fold pci_stop/remove_bus_devices in... reducing confusing. -v5: split device_register/unregister to avoid extra get... also remove extra blank line. Signed-off-by: Yinghai Lu --- drivers/pci/remove.c | 36 ++++++++++++++++++++++++++++++++++++ include/linux/pci.h | 2 ++ 2 files changed, 38 insertions(+), 0 deletions(-) diff --git a/drivers/pci/remove.c b/drivers/pci/remove.c index 513972f..7c0fd92 100644 --- a/drivers/pci/remove.c +++ b/drivers/pci/remove.c @@ -111,3 +111,39 @@ void pci_stop_and_remove_bus_device(struct pci_dev *dev) pci_remove_bus_device(dev); } EXPORT_SYMBOL(pci_stop_and_remove_bus_device); + +void pci_stop_root_bus(struct pci_bus *bus) +{ + struct pci_dev *child, *tmp; + struct pci_host_bridge *host_bridge; + + if (!pci_is_root_bus(bus)) + return; + + host_bridge = to_pci_host_bridge(bus->bridge); + list_for_each_entry_safe_reverse(child, tmp, + &bus->devices, bus_list) + pci_stop_bus_device(child); + + /* stop the host bridge */ + device_del(&host_bridge->dev); +} + +void pci_remove_root_bus(struct pci_bus *bus) +{ + struct pci_dev *child, *tmp; + struct pci_host_bridge *host_bridge; + + if (!pci_is_root_bus(bus)) + return; + + host_bridge = to_pci_host_bridge(bus->bridge); + list_for_each_entry_safe(child, tmp, + &bus->devices, bus_list) + pci_remove_bus_device(child); + pci_remove_bus(bus); + host_bridge->bus = NULL; + + /* remove the host bridge */ + put_device(&host_bridge->dev); +} diff --git a/include/linux/pci.h b/include/linux/pci.h index 505c05a..a5cd03b 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -734,6 +734,8 @@ extern struct pci_dev *pci_dev_get(struct pci_dev *dev); extern void pci_dev_put(struct pci_dev *dev); extern void pci_remove_bus(struct pci_bus *b); extern void pci_stop_and_remove_bus_device(struct pci_dev *dev); +void pci_stop_root_bus(struct pci_bus *bus); +void pci_remove_root_bus(struct pci_bus *bus); void pci_setup_cardbus(struct pci_bus *bus); extern void pci_sort_breadthfirst(void); #define dev_is_pci(d) ((d)->bus == &pci_bus_type) -- 1.7.7