[PATCH] acpi: dbg2: won't find obj when no namespace device path (lp: #1486893)

[Ivan Hu]

The spec. tells that for NamespaceString, if no namespace device exists,
NamespaceString[] must contain a period “.”, serching obj with a period will
get the false alarm below:
 dbg2: DBG2 Device '_____.____' not found in ACPI object name space.

Skip finding object with dbg2_obj_find function, if no namespace device path
exists.

Signed-off-by: Ivan Hu <ivan.hu at canonical.com>
---
 src/acpi/dbg2/dbg2.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/acpi/dbg2/dbg2.c b/src/acpi/dbg2/dbg2.c
index f5b28c1..1c023a4 100644
--- a/src/acpi/dbg2/dbg2.c
+++ b/src/acpi/dbg2/dbg2.c
@@ -320,7 +320,8 @@ static int dbg2_test1(fwts_framework *fw)
 			char *str = (char *)table->data + offset + info->namespace_offset;
 			dbg2_check_namespace_string(fw, str, info->namespace_length, &passed);
 			fwts_log_info_verbatum(fw, "  Namespace String:         '%s'", str);
-			dbg2_obj_find(fw, str, &ok);
+			if (strcmp(str, "."))
+				dbg2_obj_find(fw, str, &ok);
 		}
 		passed &= ok;
 
-- 
1.9.1