This is mandatory, but if it is missing, we need to know what
symbol had problems.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 tools/lib/python/kdoc/kdoc_output.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tools/lib/python/kdoc/kdoc_output.py b/tools/lib/python/kdoc/kdoc_output.py
index 2bfcd356654b..de107ab4a281 100644
--- a/tools/lib/python/kdoc/kdoc_output.py
+++ b/tools/lib/python/kdoc/kdoc_output.py
@@ -513,7 +513,9 @@ class RestFormat(OutputFormat):
     def out_var(self, fname, name, args):
         oldprefix = self.lineprefix
         ln = args.declaration_start_line
-        full_proto = args.other_stuff["full_proto"]
+        full_proto = args.other_stuff.get("full_proto")
+        if not full_proto:
+            raise KeyError(f"Can't find full proto for {name} variable")
 
         self.lineprefix = "  "
 
-- 
2.53.0