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authorBob Moore <robert.moore@intel.com>2008-04-10 19:06:41 +0400
committerLen Brown <len.brown@intel.com>2008-04-22 14:29:28 -0400
commit549f46044e1e207a2cbfdfb3f9a0d3fd5fd4105e (patch)
tree7f18ff91ea39569f905cb20ad1410f51c4437f56 /drivers/acpi
parent8a2e71a82375aa2aef571d5fa9064ba67c8856a5 (diff)
ACPICA: Fixed a problem with AcpiGetDevices where the search of a branch of the device tree could be terminated prematurely
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>
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/namespace/nsxfeval.c13
1 files changed, 8 insertions, 5 deletions
diff --git a/drivers/acpi/namespace/nsxfeval.c b/drivers/acpi/namespace/nsxfeval.c
index b92133faf5b7..cd97c80eb8ee 100644
--- a/drivers/acpi/namespace/nsxfeval.c
+++ b/drivers/acpi/namespace/nsxfeval.c
@@ -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.
*
******************************************************************************/