linux-kernel - [PATCH AUTOSEL 6.14 622/642] i3c: master: svc: Fix implicit fallthrough in svc_i3c_master_ibi

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Message-Id: <20250505221419.2672473-622-sashal@kernel.org>
Date: Mon,  5 May 2025 18:13:58 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Nathan Chancellor <nathan@...nel.org>,
	Alexandre Belloni <alexandre.belloni@...tlin.com>,
	Sasha Levin <sashal@...nel.org>,
	miquel.raynal@...tlin.com,
	Frank.Li@....com,
	yschu@...oton.com,
	linux-i3c@...ts.infradead.org,
	imx@...ts.linux.dev,
	llvm@...ts.linux.dev
Subject: [PATCH AUTOSEL 6.14 622/642] i3c: master: svc: Fix implicit fallthrough in svc_i3c_master_ibi_work()

From: Nathan Chancellor <nathan@...nel.org>

[ Upstream commit e8d2d287e26d9bd9114cf258a123a6b70812442e ]

Clang warns (or errors with CONFIG_WERROR=y):

  drivers/i3c/master/svc-i3c-master.c:596:2: error: unannotated fall-through between switch labels [-Werror,-Wimplicit-fallthrough]
    596 |         default:
        |         ^
  drivers/i3c/master/svc-i3c-master.c:596:2: note: insert 'break;' to avoid fall-through
    596 |         default:
        |         ^
        |         break;
  1 error generated.

Clang is a little more pedantic than GCC, which does not warn when
falling 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, which
states that all switch/case blocks must end in either break,
fallthrough, continue, goto, or return. Add the missing break to silence
the warning.

Fixes: 0430bf9bc1ac ("i3c: master: svc: Fix missing STOP for master request")
Signed-off-by: Nathan Chancellor <nathan@...nel.org>
Link: https://lore.kernel.org/r/20250319-i3c-fix-clang-fallthrough-v1-1-d8e02be1ef5c@kernel.org
Signed-off-by: Alexandre Belloni <alexandre.belloni@...tlin.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/i3c/master/svc-i3c-master.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/i3c/master/svc-i3c-master.c b/drivers/i3c/master/svc-i3c-master.c
index 2cf2c567f8931..75127b6c161f0 100644
--- a/drivers/i3c/master/svc-i3c-master.c
+++ b/drivers/i3c/master/svc-i3c-master.c
@@ -552,6 +552,7 @@ static void svc_i3c_master_ibi_work(struct work_struct *work)
 		break;
 	case SVC_I3C_MSTATUS_IBITYPE_MASTER_REQUEST:
 		svc_i3c_master_emit_stop(master);
+		break;
 	default:
 		break;
 	}
-- 
2.39.5