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Commit f084dbb9 authored by Yinghai Lu's avatar Yinghai Lu Committed by Rafael J. Wysocki
Browse files

ACPI: Set length even for TYPE_END_TAG acpi resource 



Found with a network device in QEMU/KVM guest not working anymore.

Bisected to commit c13085e5
    ACPICA: Resource Mgr: Prevent infinite loops in resource walks

That commit will check acpi_resource length strictly which causes
acpi_set_current_resources to return failure and IRQ for PCI
devices is not set properly.

Set length for all those TYPE_END_TAG acpi_resources.

[rjw: Changelog]
Bisected-by: default avatarYinghai Lu <yinghai@kernel.org>
Signed-off-by: default avatarYinghai Lu <yinghai@kernel.org>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent eccc5343

drivers/acpi/pci_link.c

+1 −0
Original line number Diff line number Diff line
@@ -354,6 +354,7 @@ static int acpi_pci_link_set(struct acpi_pci_link *link, int irq) 


	}

	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);

drivers/platform/x86/sony-laptop.c

+2 −1
Original line number Diff line number Diff line
@@ -4121,7 +4121,7 @@ static int sony_pic_enable(struct acpi_device *device, 
		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_device *device, 
		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 */

drivers/pnp/pnpacpi/rsparser.c

+1 −0
Original line number Diff line number Diff line
@@ -634,6 +634,7 @@ int pnpacpi_build_resource_template(struct pnp_dev *dev, 
	}

	/* resource will pointer the end resource now */

	resource->type = ACPI_RESOURCE_TYPE_END_TAG;

	resource->length = sizeof(struct acpi_resource);



	return 0;

}