linux-kernel - [PATCH] sound: ppc: beep: fix clang -Wimplicit-fallthrough

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Message-Id: <20211207110053.695712-1-anders.roxell@linaro.org>
Date:   Tue,  7 Dec 2021 12:00:53 +0100
From:   Anders Roxell <anders.roxell@...aro.org>
To:     perex@...ex.cz, tiwai@...e.com
Cc:     nathan@...nel.org, ndesaulniers@...gle.com,
        alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
        llvm@...ts.linux.dev, Anders Roxell <anders.roxell@...aro.org>,
        Naresh Kamboju <naresh.kamboju@...aro.org>
Subject: [PATCH] sound: ppc: beep: fix clang -Wimplicit-fallthrough

Clang warns:

sound/ppc/beep.c:103:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough]
        case SND_TONE: break;
        ^
sound/ppc/beep.c:103:2: note: insert 'break;' to avoid fall-through
        case SND_TONE: break;
        ^
        break;
1 warning generated.

Clang is more pedantic than GCC, which does not warn when failing
through to a case that is just break or return. Clang's version
is more in line with the kernel's own stance in deprecated.rst.
Add athe missing break to silence the warning.

Reported-by: Naresh Kamboju <naresh.kamboju@...aro.org>
Signed-off-by: Anders Roxell <anders.roxell@...aro.org>
---
 sound/ppc/beep.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/ppc/beep.c b/sound/ppc/beep.c
index 0f4bce1c0d4f..bf289783eafd 100644
--- a/sound/ppc/beep.c
+++ b/sound/ppc/beep.c
@@ -99,7 +99,7 @@ static int snd_pmac_beep_event(struct input_dev *dev, unsigned int type,
 		return -1;
 
 	switch (code) {
-	case SND_BELL: if (hz) hz = 1000;
+	case SND_BELL: if (hz) hz = 1000; break;
 	case SND_TONE: break;
 	default: return -1;
 	}
-- 
2.33.0