Commit 108029ff authored Jul 13, 2010 by Zhao Yakui Committed by Len Brown Jul 26, 2010

ACPI: Add the check of ADR flag in course of finding ACPI handle for PCI device

The _ADR object is used to provide OSPM with the address of one device on its
parent bus. In course of finding ACPI handle for the corresponding PCI device,
we will firstly evaluate the _ADR object and then compare the two addresses to
see whether it is the target ACPI device. But for one PCI device(0000:00:00.0)
under the PCI root bridge, the corresponding address will be constructed as
zero.In such case maybe the ACPI device without _ADR object will be misdetected
and then be used to create the relationship between PCI device and ACPI device.

https://bugzilla.kernel.org/show_bug.cgi?id=16422

Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

parent dbbe4649

drivers/acpi/glue.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -100,7 +100,8 @@ do_acpi_find_child(acpi_handle handle, u32 lvl, void context, void *rv)

		status = acpi_get_object_info(handle, &info);
		if (ACPI_SUCCESS(status)) {
		if (info->address == find->address)
		if ((info->address == find->address)
		&& (info->valid & ACPI_VALID_ADR))
		find->handle = handle;
		kfree(info);
		}

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