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ACPICA: Debugger: Lock namespace for duration of a namespace dump

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Prevents issues if the namespace is changing underneath the
debugger.  Especially temporary nodes, since the debugger displays
these also.

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Reviewed-by: Rafael Wysocki <rjw@sisk.pl>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Bob Moore 2011-01-12 09:13:31 +08:00 committed by Len Brown
parent 5d3131f5b0
commit 672af843ab
1 changed files with 15 additions and 0 deletions
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15
drivers/acpi/acpica/nsdump.c
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@ -624,9 +624,22 @@ acpi_ns_dump_objects(acpi_object_type type,
acpi_owner_id owner_id, acpi_handle start_handle)
{
struct acpi_walk_info info;
acpi_status status;
ACPI_FUNCTION_ENTRY();
/*
* Just lock the entire namespace for the duration of the dump.
* We don't want any changes to the namespace during this time,
* especially the temporary nodes since we are going to display
* them also.
*/
status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE(status)) {
acpi_os_printf("Could not acquire namespace mutex\n");
return;
}
info.debug_level = ACPI_LV_TABLES;
info.owner_id = owner_id;
info.display_type = display_type;
@ -636,6 +649,8 @@ acpi_ns_dump_objects(acpi_object_type type,
ACPI_NS_WALK_TEMP_NODES,
acpi_ns_dump_one_object, NULL,
(void *)&info, NULL);
(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
}
#endif /* ACPI_FUTURE_USAGE */