From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alex Chiang Subject: Re: [PATCH v2 07/11] ACPI: acpi_pci_unbind should clean up properly after acpi_pci_bind Date: Thu, 4 Jun 2009 17:35:21 -0600 Message-ID: <20090604233521.GA12900@ethanol> References: <20090604054504.18802.21690.stgit@bob.kio> <20090604055852.18802.22743.stgit@bob.kio> <4A2788FA.2050606@jp.fujitsu.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from g5t0006.atlanta.hp.com ([15.192.0.43]:14082 "EHLO g5t0006.atlanta.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752105AbZFDXpc (ORCPT ); Thu, 4 Jun 2009 19:45:32 -0400 Content-Disposition: inline In-Reply-To: <4A2788FA.2050606@jp.fujitsu.com> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: Kenji Kaneshige Cc: lenb@kernel.org, linux-acpi@vger.kernel.org, Bjorn Helgaas , linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org * Kenji Kaneshige : >> > > I have a concern about this change. > > The acpi_pci_irq_del_prt() against dev->bus removes not only > the _PRT entries for PCI function corresponding to specified > acpi_device, but also other _PRT entries for working PCI > devices/functions on the same bus. As a result, interrupt > initialization for those PCI functions would no longer work > properly after that. > > So I think we should not call acpi_pci_irq_del_prt() against > dev->bus. Thanks for the review. I agree with you. Here is a respun version of this patch. From: Alex Chiang ACPI: acpi_pci_unbind should clean up properly after acpi_pci_bind In acpi_pci_bind, we set device->ops.bind and device->ops.unbind, but never clear them out. Cc: Bjorn Helgaas Signed-off-by: Alex Chiang --- diff --git a/drivers/acpi/pci_bind.c b/drivers/acpi/pci_bind.c index 62cb383..c9cc650 100644 --- a/drivers/acpi/pci_bind.c +++ b/drivers/acpi/pci_bind.c @@ -109,11 +109,13 @@ static int acpi_pci_unbind(struct acpi_device *device) struct pci_dev *dev; dev = acpi_get_pci_dev(device->handle); - if (!dev) + if (!dev || !dev->subordinate) return 0; - if (dev->subordinate) - acpi_pci_irq_del_prt(dev->subordinate); + acpi_pci_irq_del_prt(dev->subordinate); + + device->ops.bind = NULL; + device->ops.unbind = NULL; pci_dev_put(dev); return 0;