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From: Nathan Chancellor <nathan@kernel.org>
To: Jesse Brandeburg <jesse.brandeburg@intel.com>,
	Tony Nguyen <anthony.l.nguyen@intel.com>,
	"David S. Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>,
	intel-wired-lan@lists.osuosl.org, netdev@vger.kernel.org,
	linux-kernel@vger.kernel.org, llvm@lists.linux.dev,
	Nathan Chancellor <nathan@kernel.org>
Subject: [PATCH] ice: Fix clang -Wimplicit-fallthrough in ice_pull_qvec_from_rc()
Date: Mon, 18 Oct 2021 18:42:03 -0700	[thread overview]
Message-ID: <20211019014203.1926130-1-nathan@kernel.org> (raw)

Clang warns:

drivers/net/ethernet/intel/ice/ice_lib.c:1906:2: error: unannotated fall-through between switch labels [-Werror,-Wimplicit-fallthrough]
        default:
        ^
drivers/net/ethernet/intel/ice/ice_lib.c:1906:2: note: insert 'break;' to avoid fall-through
        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.

Link: https://github.com/ClangBuiltLinux/linux/issues/1482
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
---
 drivers/net/ethernet/intel/ice/ice_lib.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/intel/ice/ice_lib.c b/drivers/net/ethernet/intel/ice/ice_lib.c
index f981e77f72ad..03443c060507 100644
--- a/drivers/net/ethernet/intel/ice/ice_lib.c
+++ b/drivers/net/ethernet/intel/ice/ice_lib.c
@@ -1903,6 +1903,7 @@ static struct ice_q_vector *ice_pull_qvec_from_rc(struct ice_ring_container *rc)
 	case ICE_TX_CONTAINER:
 		if (rc->tx_ring)
 			return rc->tx_ring->q_vector;
+		break;
 	default:
 		break;
 	}

base-commit: 939a6567f976efb8b3e6d601ce35eb56b17babd0
-- 
2.33.1.637.gf443b226ca


WARNING: multiple messages have this Message-ID (diff)
From: Nathan Chancellor <nathan@kernel.org>
To: intel-wired-lan@osuosl.org
Subject: [Intel-wired-lan] [PATCH] ice: Fix clang -Wimplicit-fallthrough in ice_pull_qvec_from_rc()
Date: Mon, 18 Oct 2021 18:42:03 -0700	[thread overview]
Message-ID: <20211019014203.1926130-1-nathan@kernel.org> (raw)

Clang warns:

drivers/net/ethernet/intel/ice/ice_lib.c:1906:2: error: unannotated fall-through between switch labels [-Werror,-Wimplicit-fallthrough]
        default:
        ^
drivers/net/ethernet/intel/ice/ice_lib.c:1906:2: note: insert 'break;' to avoid fall-through
        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.

Link: https://github.com/ClangBuiltLinux/linux/issues/1482
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
---
 drivers/net/ethernet/intel/ice/ice_lib.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/intel/ice/ice_lib.c b/drivers/net/ethernet/intel/ice/ice_lib.c
index f981e77f72ad..03443c060507 100644
--- a/drivers/net/ethernet/intel/ice/ice_lib.c
+++ b/drivers/net/ethernet/intel/ice/ice_lib.c
@@ -1903,6 +1903,7 @@ static struct ice_q_vector *ice_pull_qvec_from_rc(struct ice_ring_container *rc)
 	case ICE_TX_CONTAINER:
 		if (rc->tx_ring)
 			return rc->tx_ring->q_vector;
+		break;
 	default:
 		break;
 	}

base-commit: 939a6567f976efb8b3e6d601ce35eb56b17babd0
-- 
2.33.1.637.gf443b226ca


             reply	other threads:[~2021-10-19  1:42 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-19  1:42 Nathan Chancellor [this message]
2021-10-19  1:42 ` [Intel-wired-lan] [PATCH] ice: Fix clang -Wimplicit-fallthrough in ice_pull_qvec_from_rc() Nathan Chancellor
2021-10-19 15:32 ` Jesse Brandeburg
2021-10-19 15:32   ` [Intel-wired-lan] " Jesse Brandeburg
2021-10-21 11:45 ` G, GurucharanX

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