kconfig: error out when seeing recursive dependency

Originally, recursive dependency was a fatal error for Kconfig
because Kconfig cannot compute symbol values in such a situation.

Commit d595cea62403 ("kconfig: print more info when we see a recursive
dependency") changed it to a warning, which I guess was not intentional.

Get it back to an error again.

Also, rename the unit test directory "warn_recursive_dep" to
"err_recursive_dep" so that it matches to the behavior.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Tested-by: Dirk Gouders <dirk@gouders.net>

5 files changed, 10 insertions, 12 deletions

diff --git a/scripts/kconfig/symbol.c b/scripts/kconfig/symbol.c
index 4ec8b1f0d42c..688f487ff454 100644
--- a/scripts/kconfig/symbol.c
+++ b/scripts/kconfig/symbol.c
@@ -1248,9 +1248,6 @@ struct symbol *sym_check_deps(struct symbol *sym)
 		sym->flags &= ~SYMBOL_CHECK;
 	}
 
-	if (sym2 && sym2 == sym)
-		sym2 = NULL;
-
 	return sym2;
 }
 
diff --git a/scripts/kconfig/tests/warn_recursive_dep/Kconfig b/scripts/kconfig/tests/err_recursive_dep/Kconfig
index a65bfcb7137e..a65bfcb7137e 100644
--- a/scripts/kconfig/tests/warn_recursive_dep/Kconfig
+++ b/scripts/kconfig/tests/err_recursive_dep/Kconfig
diff --git a/scripts/kconfig/tests/err_recursive_dep/__init__.py b/scripts/kconfig/tests/err_recursive_dep/__init__.py
new file mode 100644
index 000000000000..5f3821b43ce6
--- /dev/null
+++ b/scripts/kconfig/tests/err_recursive_dep/__init__.py
@@ -0,0 +1,10 @@
+# SPDX-License-Identifier: GPL-2.0
+"""
+Detect recursive dependency error.
+
+Recursive dependency should be treated as an error.
+"""
+
+def test(conf):
+    assert conf.oldaskconfig() == 1
+    assert conf.stderr_contains('expected_stderr')
diff --git a/scripts/kconfig/tests/warn_recursive_dep/expected_stderr b/scripts/kconfig/tests/err_recursive_dep/expected_stderr
index 3de807dd9cb2..3de807dd9cb2 100644
--- a/scripts/kconfig/tests/warn_recursive_dep/expected_stderr
+++ b/scripts/kconfig/tests/err_recursive_dep/expected_stderr
diff --git a/scripts/kconfig/tests/warn_recursive_dep/__init__.py b/scripts/kconfig/tests/warn_recursive_dep/__init__.py
deleted file mode 100644
index adb21951ba41..000000000000
--- a/scripts/kconfig/tests/warn_recursive_dep/__init__.py
+++ /dev/null
@@ -1,9 +0,0 @@
-"""
-Warn recursive inclusion.
-
-Recursive dependency should be warned.
-"""
-
-def test(conf):
-    assert conf.oldaskconfig() == 0
-    assert conf.stderr_contains('expected_stderr')