linux-kernel - [PATCH] selftests/alsa: fix a build warning: return a value in all cases

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Date: Fri,  3 May 2024 19:13:30 -0700
From: John Hubbard <jhubbard@...dia.com>
To: Shuah Khan <shuah@...nel.org>
Cc: Mark Brown <broonie@...nel.org>,
	Jaroslav Kysela <perex@...ex.cz>,
	Takashi Iwai <tiwai@...e.com>,
	Ivan Orlov <ivan.orlov0322@...il.com>,
	linux-sound@...r.kernel.org,
	Valentin Obst <kernel@...entinobst.de>,
	linux-kselftest@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>,
	llvm@...ts.linux.dev,
	John Hubbard <jhubbard@...dia.com>
Subject: [PATCH] selftests/alsa: fix a build warning: return a value in all cases

dump_config_tree() is declared to return an int, but the compiler cannot
prove that it always returns any value at all. This leads to a clang
warning, when building via:

    make LLVM=1 -C tools/testing/selftests

Fix this by unconditionally returning the "err" variable if the code
reaches the end of the function.

Signed-off-by: John Hubbard <jhubbard@...dia.com>
---
 tools/testing/selftests/alsa/conf.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/testing/selftests/alsa/conf.c b/tools/testing/selftests/alsa/conf.c
index 89e3656a042d..0109fde53e6f 100644
--- a/tools/testing/selftests/alsa/conf.c
+++ b/tools/testing/selftests/alsa/conf.c
@@ -116,6 +116,8 @@ static int dump_config_tree(snd_config_t *top)
 	if (snd_config_save(top, out))
 		ksft_exit_fail_msg("config save\n");
 	snd_output_close(out);
+
+	return err;
 }
 
 snd_config_t *conf_load_from_file(const char *filename)

base-commit: ddb4c3f25b7b95df3d6932db0b379d768a6ebdf7
prerequisite-patch-id: b901ece2a5b78503e2fb5480f20e304d36a0ea27
-- 
2.45.0