From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Yinghai Lu To: Jesse Barnes , x86 Cc: Bjorn Helgaas , Andrew Morton , Linus Torvalds , Greg Kroah-Hartman , linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, Jiang Liu , Yinghai Lu Subject: [PATCH -v3 20/47] Correctly clean up pci root buses in function pci_remove_bus() Date: Sun, 18 Mar 2012 22:46:09 -0700 Message-Id: <1332135996-13860-21-git-send-email-yinghai@kernel.org> In-Reply-To: <1332135996-13860-1-git-send-email-yinghai@kernel.org> References: <1332135996-13860-1-git-send-email-yinghai@kernel.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: From: Jiang Liu The function pci_create_root_bus() allocates the pci bus structure, registers the bus device and creates the legacy files for a pci root bus, but returns without setting the is_added flag. The is_added flag for a pci root bus will be set by function pci_scan_child_bus(). If a pci root bus is destroyed before calling pci_scan_child_bus(), the is_added flag will not be set. So teach function pci_remove_bus() to detect such a case and correctly clean up pci root buses. Signed-off-by: Jiang Liu Signed-off-by: Yinghai Lu --- drivers/pci/remove.c | 9 ++++----- 1 files changed, 4 insertions(+), 5 deletions(-) diff --git a/drivers/pci/remove.c b/drivers/pci/remove.c index 04a4861..bf4b46b 100644 --- a/drivers/pci/remove.c +++ b/drivers/pci/remove.c @@ -70,11 +70,10 @@ void pci_remove_bus(struct pci_bus *pci_bus) list_del(&pci_bus->node); pci_bus_release_busn_res(pci_bus); up_write(&pci_bus_sem); - if (!pci_bus->is_added) - return; - - pci_remove_legacy_files(pci_bus); - device_unregister(&pci_bus->dev); + if (pci_bus->is_added || pci_is_root_bus(pci_bus)) { + pci_remove_legacy_files(pci_bus); + device_unregister(&pci_bus->dev); + } } EXPORT_SYMBOL(pci_remove_bus); -- 1.7.7