From 549f46044e1e207a2cbfdfb3f9a0d3fd5fd4105e Mon Sep 17 00:00:00 2001 From: Bob Moore Date: Thu, 10 Apr 2008 19:06:41 +0400 Subject: [PATCH] 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 Signed-off-by: Alexey Starikovskiy Signed-off-by: Len Brown --- drivers/acpi/namespace/nsxfeval.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) diff --git a/drivers/acpi/namespace/nsxfeval.c b/drivers/acpi/namespace/nsxfeval.c index b92133faf5b..cd97c80eb8e 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. * ******************************************************************************/ -- 2.41.1