linux-hardening - [PATCH v3][next] mtd: rawnand: stm32_fmc2: Fix fall-through warnings for Clang

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Date:   Fri, 5 Mar 2021 02:29:53 -0600
From:   "Gustavo A. R. Silva" <gustavoars@...nel.org>
To:     Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...com>
Cc:     linux-mtd@...ts.infradead.org,
        linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        "Gustavo A. R. Silva" <gustavoars@...nel.org>,
        linux-hardening@...r.kernel.org
Subject: [PATCH v3][next] mtd: rawnand: stm32_fmc2: Fix fall-through warnings
 for Clang

In preparation to enable -Wimplicit-fallthrough for Clang, fix a couple
of warnings by explicitly adding a couple of break statements instead
of letting the code fall through to the next case.

Link: https://github.com/KSPP/linux/issues/115
Signed-off-by: Gustavo A. R. Silva <gustavoars@...nel.org>
---
Changes in v3:
 Update the changelog text according to the actual code change.

Changes in v2:
 Make use of a break statement instead of fallthrough for consistency.
 Link: https://lore.kernel.org/lkml/20201123093347.719a77cf@xps13/

 drivers/mtd/nand/raw/stm32_fmc2_nand.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/mtd/nand/raw/stm32_fmc2_nand.c b/drivers/mtd/nand/raw/stm32_fmc2_nand.c
index 550bda4d1415..1c277fbb91f2 100644
--- a/drivers/mtd/nand/raw/stm32_fmc2_nand.c
+++ b/drivers/mtd/nand/raw/stm32_fmc2_nand.c
@@ -531,6 +531,7 @@ static int stm32_fmc2_nfc_ham_correct(struct nand_chip *chip, u8 *dat,
 		switch (b % 4) {
 		case 2:
 			bit_position += shifting;
+			break;
 		case 1:
 			break;
 		default:
@@ -546,6 +547,7 @@ static int stm32_fmc2_nfc_ham_correct(struct nand_chip *chip, u8 *dat,
 		switch (b % 4) {
 		case 2:
 			byte_addr += shifting;
+			break;
 		case 1:
 			break;
 		default:
-- 
2.27.0