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ACPICA: Fixed a problem with AcpiGetDevices where the search of a branch of the device tree could be terminated prematurely

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In accordance with the ACPI specification, the search is terminated
if a device is both not present and not functional (instead of
just not present.) Yakui Zhao.

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Bob Moore 2008-04-10 19:06:41 +04:00 committed by Len Brown
parent 8a2e71a823
commit 549f46044e
1 changed files with 8 additions and 5 deletions
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13
drivers/acpi/namespace/nsxfeval.c
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@ -467,10 +467,13 @@ acpi_ns_get_device_callback(acpi_handle obj_handle,
return (AE_CTRL_DEPTH);
}
if (!(flags & ACPI_STA_DEVICE_PRESENT)) {
/* Don't examine children of the device if not present */
if (!(flags & ACPI_STA_DEVICE_PRESENT) &&
!(flags & ACPI_STA_DEVICE_FUNCTIONING)) {
/*
* Don't examine the children of the device only when the
* device is neither present nor functional. See ACPI spec,
* description of _STA for more information.
*/
return (AE_CTRL_DEPTH);
}
@ -539,7 +542,7 @@ acpi_ns_get_device_callback(acpi_handle obj_handle,
* value is returned to the caller.
*
* This is a wrapper for walk_namespace, but the callback performs
* additional filtering. Please see acpi_get_device_callback.
* additional filtering. Please see acpi_ns_get_device_callback.
*
******************************************************************************/