On Saturday, March 23, 2013 12:16:37 PM Yinghai Lu wrote:
> Found with pm/linux-next, network device in QEMU/KVM guest does not
> work anymore.
>
> Bisected to commit c13085e5
> ACPICA: Resource Mgr: Prevent infinite loops in resource walks
>
> That commit will check acpi_resource length strictly.
> it cause acpi_set_current_resources return failure and irq for pci device
> is not set properly.
>
> Set length for all those TYPE_END_TAG acpi_resources.
>
> Bisected-by: Yinghai Lu <yinghai@xxxxxxxxxx>
> Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx>
> Cc: Mattia Dongili <malattia@xxxxxxxx>
> Cc: Matthew Garrett <matthew.garrett@xxxxxxxxxx>
> Cc: Adam Belay <abelay@xxxxxxx>
> Cc: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
> Cc: platform-driver-x86@xxxxxxxxxxxxxxx
Applied.
Thanks,
Rafael
> ---
> drivers/acpi/pci_link.c | 1 +
> drivers/platform/x86/sony-laptop.c | 3 ++-
> drivers/pnp/pnpacpi/rsparser.c | 1 +
> 3 files changed, 4 insertions(+), 1 deletion(-)
>
> Index: linux-2.6/drivers/acpi/pci_link.c
> ===================================================================
> --- linux-2.6.orig/drivers/acpi/pci_link.c
> +++ linux-2.6/drivers/acpi/pci_link.c
> @@ -354,6 +354,7 @@ static int acpi_pci_link_set(struct acpi
>
> }
> resource->end.type = ACPI_RESOURCE_TYPE_END_TAG;
> + resource->end.length = sizeof(struct acpi_resource);
>
> /* Attempt to set the resource */
> status = acpi_set_current_resources(link->device->handle, &buffer);
> Index: linux-2.6/drivers/platform/x86/sony-laptop.c
> ===================================================================
> --- linux-2.6.orig/drivers/platform/x86/sony-laptop.c
> +++ linux-2.6/drivers/platform/x86/sony-laptop.c
> @@ -4121,7 +4121,7 @@ static int sony_pic_enable(struct acpi_d
> resource->res3.data.irq.sharable = ACPI_SHARED;
>
> resource->res4.type = ACPI_RESOURCE_TYPE_END_TAG;
> -
> + resource->res4.length = sizeof(struct acpi_resource);
> }
> /* setup Type 2/3 resources */
> else {
> @@ -4140,6 +4140,7 @@ static int sony_pic_enable(struct acpi_d
> resource->res2.data.irq.sharable = ACPI_SHARED;
>
> resource->res3.type = ACPI_RESOURCE_TYPE_END_TAG;
> + resource->res3.length = sizeof(struct acpi_resource);
> }
>
> /* Attempt to set the resource */
> Index: linux-2.6/drivers/pnp/pnpacpi/rsparser.c
> ===================================================================
> --- linux-2.6.orig/drivers/pnp/pnpacpi/rsparser.c
> +++ linux-2.6/drivers/pnp/pnpacpi/rsparser.c
> @@ -634,6 +634,7 @@ int pnpacpi_build_resource_template(stru
> }
> /* resource will pointer the end resource now */
> resource->type = ACPI_RESOURCE_TYPE_END_TAG;
> + resource->length = sizeof(struct acpi_resource);
>
> return 0;
> }
> --
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--
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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