Messages in this thread Patch in this message |  | | Date | Thu, 4 Jun 2009 17:35:21 -0600 | From | Alex Chiang <> | Subject | Re: [PATCH v2 07/11] ACPI: acpi_pci_unbind should clean up properly after acpi_pci_bind |
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* Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>: >> > > 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 <achiang@hp.com>
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 <bjorn.helgaas@hp.com> Signed-off-by: Alex Chiang <achiang@hp.com> --- 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;
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