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* [PATCH v2] mtd: rawnand: mark expected switch fall-throughs
@ 2019-01-28 18:15 Gustavo A. R. Silva
  2019-02-05 12:55 ` Miquel Raynal
  0 siblings, 1 reply; 7+ messages in thread
From: Gustavo A. R. Silva @ 2019-01-28 18:15 UTC (permalink / raw)
  To: Kyungmin Park, Boris Brezillon, Miquel Raynal,
	Richard Weinberger, David Woodhouse, Brian Norris, Marek Vasut,
	Wan ZongShun
  Cc: Kees Cook, linux-mtd, linux-kernel, linux-arm-kernel,
	Gustavo A. R. Silva

In preparation to enabling -Wimplicit-fallthrough, mark switch
cases where we are expecting to fall through.

This patch fixes the following warning:

drivers/mtd/nand/onenand/onenand_base.c:3264:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
drivers/mtd/nand/onenand/onenand_base.c:3288:17: warning: this statement may fall through [-Wimplicit-fallthrough=]
drivers/mtd/nand/raw/nand_base.c:5538:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
drivers/mtd/nand/raw/nand_base.c:5557:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
drivers/mtd/nand/raw/nand_base.c:5595:13: warning: this statement may fall through [-Wimplicit-fallthrough=]
drivers/mtd/nand/raw/nand_legacy.c:332:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
drivers/mtd/nand/raw/nand_legacy.c:483:3: warning: this statement may fall through [-Wimplicit-fallthrough=]
drivers/mtd/nand/raw/nandsim.c:2254:22: warning: this statement may fall through [-Wimplicit-fallthrough=]
drivers/mtd/nand/raw/omap_elm.c:512:4: warning: this statement may fall through [-Wimplicit-fallthrough=]
drivers/mtd/nand/raw/omap_elm.c:517:4: warning: this statement may fall through [-Wimplicit-fallthrough=]
drivers/mtd/nand/raw/omap_elm.c:466:37: warning: this statement may fall through [-Wimplicit-fallthrough=]
drivers/mtd/nand/raw/omap_elm.c:471:37: warning: this statement may fall through [-Wimplicit-fallthrough=]
drivers/mtd/nand/raw/nuc900_nand.c: In function ‘nuc900_nand_command_lp’:
./arch/x86/include/asm/io.h:91:22: warning: this statement may fall through [-Wimplicit-fallthrough=]
 #define __raw_writel __writel
drivers/mtd/nand/raw/nuc900_nand.c:52:2: note: in expansion of macro ‘__raw_writel’
  __raw_writel((val), (dev)->reg + REG_SMCMD)
  ^~~~~~~~~~~~
drivers/mtd/nand/raw/nuc900_nand.c:196:3: note: in expansion of macro ‘write_cmd_reg’
   write_cmd_reg(nand, NAND_CMD_READSTART);
   ^~~~~~~~~~~~~
drivers/mtd/nand/raw/nuc900_nand.c:197:2: note: here
  default:
  ^~~~~~~

Warning level 3 was used: -Wimplicit-fallthrough=3

This patch is part of the ongoing efforts to enabling
-Wimplicit-fallthrough.

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
---
Changes in v2:
 - Add extra /* fall through */ comment in nandsim.c file.

 drivers/mtd/nand/onenand/onenand_base.c | 2 ++
 drivers/mtd/nand/raw/diskonchip.c       | 1 +
 drivers/mtd/nand/raw/nand_base.c        | 3 +++
 drivers/mtd/nand/raw/nand_legacy.c      | 3 ++-
 drivers/mtd/nand/raw/nandsim.c          | 6 ++++--
 drivers/mtd/nand/raw/nuc900_nand.c      | 3 ++-
 drivers/mtd/nand/raw/omap_elm.c         | 4 ++++
 7 files changed, 18 insertions(+), 4 deletions(-)

diff --git a/drivers/mtd/nand/onenand/onenand_base.c b/drivers/mtd/nand/onenand/onenand_base.c
index 4ca4b194e7d7..e9b71ad24f50 100644
--- a/drivers/mtd/nand/onenand/onenand_base.c
+++ b/drivers/mtd/nand/onenand/onenand_base.c
@@ -3280,12 +3280,14 @@ static void onenand_check_features(struct mtd_info *mtd)
 			if ((this->version_id & 0xf) == 0xe)
 				this->options |= ONENAND_HAS_NOP_1;
 		}
+		/* fall through */
 
 	case ONENAND_DEVICE_DENSITY_2Gb:
 		/* 2Gb DDP does not have 2 plane */
 		if (!ONENAND_IS_DDP(this))
 			this->options |= ONENAND_HAS_2PLANE;
 		this->options |= ONENAND_HAS_UNLOCK_ALL;
+		/* fall through */
 
 	case ONENAND_DEVICE_DENSITY_1Gb:
 		/* A-Die has all block unlock */
diff --git a/drivers/mtd/nand/raw/diskonchip.c b/drivers/mtd/nand/raw/diskonchip.c
index 53f57e0f007e..ead54c90f2d1 100644
--- a/drivers/mtd/nand/raw/diskonchip.c
+++ b/drivers/mtd/nand/raw/diskonchip.c
@@ -1477,6 +1477,7 @@ static int __init doc_probe(unsigned long physadr)
 			break;
 		case DOC_ChipID_DocMilPlus32:
 			pr_err("DiskOnChip Millennium Plus 32MB is not supported, ignoring.\n");
+			/* fall through */
 		default:
 			ret = -ENODEV;
 			goto notfound;
diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
index 96cadead262e..e05ecf2e4269 100644
--- a/drivers/mtd/nand/raw/nand_base.c
+++ b/drivers/mtd/nand/raw/nand_base.c
@@ -5537,6 +5537,7 @@ static int nand_scan_tail(struct nand_chip *chip)
 		}
 		if (!ecc->read_page)
 			ecc->read_page = nand_read_page_hwecc_oob_first;
+		/* fall through */
 
 	case NAND_ECC_HW:
 		/* Use standard hwecc read page function? */
@@ -5556,6 +5557,7 @@ static int nand_scan_tail(struct nand_chip *chip)
 			ecc->read_subpage = nand_read_subpage;
 		if (!ecc->write_subpage && ecc->hwctl && ecc->calculate)
 			ecc->write_subpage = nand_write_subpage_hwecc;
+		/* fall through */
 
 	case NAND_ECC_HW_SYNDROME:
 		if ((!ecc->calculate || !ecc->correct || !ecc->hwctl) &&
@@ -5593,6 +5595,7 @@ static int nand_scan_tail(struct nand_chip *chip)
 			ecc->size, mtd->writesize);
 		ecc->mode = NAND_ECC_SOFT;
 		ecc->algo = NAND_ECC_HAMMING;
+		/* fall through */
 
 	case NAND_ECC_SOFT:
 		ret = nand_set_ecc_soft_ops(chip);
diff --git a/drivers/mtd/nand/raw/nand_legacy.c b/drivers/mtd/nand/raw/nand_legacy.c
index 43575943f13b..f2526ec616a6 100644
--- a/drivers/mtd/nand/raw/nand_legacy.c
+++ b/drivers/mtd/nand/raw/nand_legacy.c
@@ -331,6 +331,7 @@ static void nand_command(struct nand_chip *chip, unsigned int command,
 		 */
 		if (column == -1 && page_addr == -1)
 			return;
+		/* fall through */
 
 	default:
 		/*
@@ -483,7 +484,7 @@ static void nand_command_lp(struct nand_chip *chip, unsigned int command,
 		chip->legacy.cmd_ctrl(chip, NAND_CMD_NONE,
 				      NAND_NCE | NAND_CTRL_CHANGE);
 
-		/* This applies to read commands */
+		/* fall through - This applies to read commands */
 	default:
 		/*
 		 * If we don't have access to the busy pin, we apply the given
diff --git a/drivers/mtd/nand/raw/nandsim.c b/drivers/mtd/nand/raw/nandsim.c
index 933d1a629c51..edf5fd3d5f07 100644
--- a/drivers/mtd/nand/raw/nandsim.c
+++ b/drivers/mtd/nand/raw/nandsim.c
@@ -2251,9 +2251,11 @@ static int __init ns_init_module(void)
 
 	switch (bbt) {
 	case 2:
-		 chip->bbt_options |= NAND_BBT_NO_OOB;
+		chip->bbt_options |= NAND_BBT_NO_OOB;
+		/* fall through */
 	case 1:
-		 chip->bbt_options |= NAND_BBT_USE_FLASH;
+		chip->bbt_options |= NAND_BBT_USE_FLASH;
+		/* fall through */
 	case 0:
 		break;
 	default:
diff --git a/drivers/mtd/nand/raw/nuc900_nand.c b/drivers/mtd/nand/raw/nuc900_nand.c
index 38b1994e7ed3..56fa84029482 100644
--- a/drivers/mtd/nand/raw/nuc900_nand.c
+++ b/drivers/mtd/nand/raw/nuc900_nand.c
@@ -192,8 +192,9 @@ static void nuc900_nand_command_lp(struct nand_chip *chip,
 		return;
 
 	case NAND_CMD_READ0:
-
 		write_cmd_reg(nand, NAND_CMD_READSTART);
+		/* fall through */
+
 	default:
 
 		if (!chip->legacy.dev_ready) {
diff --git a/drivers/mtd/nand/raw/omap_elm.c b/drivers/mtd/nand/raw/omap_elm.c
index a3f32f939cc1..94c6401ef32f 100644
--- a/drivers/mtd/nand/raw/omap_elm.c
+++ b/drivers/mtd/nand/raw/omap_elm.c
@@ -465,11 +465,13 @@ static int elm_context_save(struct elm_info *info)
 					ELM_SYNDROME_FRAGMENT_5 + offset);
 			regs->elm_syndrome_fragment_4[i] = elm_read_reg(info,
 					ELM_SYNDROME_FRAGMENT_4 + offset);
+			/* fall through */
 		case BCH8_ECC:
 			regs->elm_syndrome_fragment_3[i] = elm_read_reg(info,
 					ELM_SYNDROME_FRAGMENT_3 + offset);
 			regs->elm_syndrome_fragment_2[i] = elm_read_reg(info,
 					ELM_SYNDROME_FRAGMENT_2 + offset);
+			/* fall through */
 		case BCH4_ECC:
 			regs->elm_syndrome_fragment_1[i] = elm_read_reg(info,
 					ELM_SYNDROME_FRAGMENT_1 + offset);
@@ -511,11 +513,13 @@ static int elm_context_restore(struct elm_info *info)
 					regs->elm_syndrome_fragment_5[i]);
 			elm_write_reg(info, ELM_SYNDROME_FRAGMENT_4 + offset,
 					regs->elm_syndrome_fragment_4[i]);
+			/* fall through */
 		case BCH8_ECC:
 			elm_write_reg(info, ELM_SYNDROME_FRAGMENT_3 + offset,
 					regs->elm_syndrome_fragment_3[i]);
 			elm_write_reg(info, ELM_SYNDROME_FRAGMENT_2 + offset,
 					regs->elm_syndrome_fragment_2[i]);
+			/* fall through */
 		case BCH4_ECC:
 			elm_write_reg(info, ELM_SYNDROME_FRAGMENT_1 + offset,
 					regs->elm_syndrome_fragment_1[i]);
-- 
2.20.1


______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/

^ permalink raw reply	[flat|nested] 7+ messages in thread

* Re: [PATCH v2] mtd: rawnand: mark expected switch fall-throughs
  2019-01-28 18:15 [PATCH v2] mtd: rawnand: mark expected switch fall-throughs Gustavo A. R. Silva
@ 2019-02-05 12:55 ` Miquel Raynal
  2019-02-08 17:11   ` Gustavo A. R. Silva
  2019-04-11 18:30   ` Gustavo A. R. Silva
  0 siblings, 2 replies; 7+ messages in thread
From: Miquel Raynal @ 2019-02-05 12:55 UTC (permalink / raw)
  To: Gustavo A. R. Silva
  Cc: Kees Cook, Wan ZongShun, Boris Brezillon, Richard Weinberger,
	linux-kernel, Marek Vasut, Kyungmin Park, linux-mtd,
	Brian Norris, David Woodhouse, linux-arm-kernel

Hi Gustavo,

"Gustavo A. R. Silva" <gustavo@embeddedor.com> wrote on Mon, 28 Jan
2019 12:15:20 -0600:

> In preparation to enabling -Wimplicit-fallthrough, mark switch
> cases where we are expecting to fall through.
> 
> This patch fixes the following warning:
> 
> drivers/mtd/nand/onenand/onenand_base.c:3264:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
> drivers/mtd/nand/onenand/onenand_base.c:3288:17: warning: this statement may fall through [-Wimplicit-fallthrough=]
> drivers/mtd/nand/raw/nand_base.c:5538:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
> drivers/mtd/nand/raw/nand_base.c:5557:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
> drivers/mtd/nand/raw/nand_base.c:5595:13: warning: this statement may fall through [-Wimplicit-fallthrough=]
> drivers/mtd/nand/raw/nand_legacy.c:332:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
> drivers/mtd/nand/raw/nand_legacy.c:483:3: warning: this statement may fall through [-Wimplicit-fallthrough=]
> drivers/mtd/nand/raw/nandsim.c:2254:22: warning: this statement may fall through [-Wimplicit-fallthrough=]
> drivers/mtd/nand/raw/omap_elm.c:512:4: warning: this statement may fall through [-Wimplicit-fallthrough=]
> drivers/mtd/nand/raw/omap_elm.c:517:4: warning: this statement may fall through [-Wimplicit-fallthrough=]
> drivers/mtd/nand/raw/omap_elm.c:466:37: warning: this statement may fall through [-Wimplicit-fallthrough=]
> drivers/mtd/nand/raw/omap_elm.c:471:37: warning: this statement may fall through [-Wimplicit-fallthrough=]
> drivers/mtd/nand/raw/nuc900_nand.c: In function ‘nuc900_nand_command_lp’:
> ./arch/x86/include/asm/io.h:91:22: warning: this statement may fall through [-Wimplicit-fallthrough=]
>  #define __raw_writel __writel
> drivers/mtd/nand/raw/nuc900_nand.c:52:2: note: in expansion of macro ‘__raw_writel’
>   __raw_writel((val), (dev)->reg + REG_SMCMD)
>   ^~~~~~~~~~~~
> drivers/mtd/nand/raw/nuc900_nand.c:196:3: note: in expansion of macro ‘write_cmd_reg’
>    write_cmd_reg(nand, NAND_CMD_READSTART);
>    ^~~~~~~~~~~~~
> drivers/mtd/nand/raw/nuc900_nand.c:197:2: note: here
>   default:
>   ^~~~~~~
> 
> Warning level 3 was used: -Wimplicit-fallthrough=3
> 
> This patch is part of the ongoing efforts to enabling
> -Wimplicit-fallthrough.
> 
> Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
> ---
> Changes in v2:
>  - Add extra /* fall through */ comment in nandsim.c file.
> 
>  drivers/mtd/nand/onenand/onenand_base.c | 2 ++
>  drivers/mtd/nand/raw/diskonchip.c       | 1 +
>  drivers/mtd/nand/raw/nand_base.c        | 3 +++
>  drivers/mtd/nand/raw/nand_legacy.c      | 3 ++-
>  drivers/mtd/nand/raw/nandsim.c          | 6 ++++--
>  drivers/mtd/nand/raw/nuc900_nand.c      | 3 ++-
>  drivers/mtd/nand/raw/omap_elm.c         | 4 ++++
>  7 files changed, 18 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/mtd/nand/onenand/onenand_base.c b/drivers/mtd/nand/onenand/onenand_base.c
> index 4ca4b194e7d7..e9b71ad24f50 100644
> --- a/drivers/mtd/nand/onenand/onenand_base.c
> +++ b/drivers/mtd/nand/onenand/onenand_base.c

onenand changes should probably be in a separate patch prefixed

        mtd: onenand:

When you are unsure, please run

        git log --oneline --follow drivers/mtd/nand/onenand/

> @@ -3280,12 +3280,14 @@ static void onenand_check_features(struct mtd_info *mtd)
>  			if ((this->version_id & 0xf) == 0xe)
>  				this->options |= ONENAND_HAS_NOP_1;
>  		}
> +		/* fall through */
>  
>  	case ONENAND_DEVICE_DENSITY_2Gb:
>  		/* 2Gb DDP does not have 2 plane */
>  		if (!ONENAND_IS_DDP(this))
>  			this->options |= ONENAND_HAS_2PLANE;
>  		this->options |= ONENAND_HAS_UNLOCK_ALL;
> +		/* fall through */

This looks strange.

In ONENAND_DEVICE_DENSITY_2Gb:
ONENAND_HAS_UNLOCK_ALL is set unconditionally.

But then, under ONENAND_DEVICE_DENSITY_1Gb, the same option is set only
if process is evaluated to true.

Same problem with ONENAND_HAS_2PLANE:
- it is set in ONENAND_DEVICE_DENSITY_4Gb only if ONENAND_IS_DDP()
- it is unset in ONENAND_DEVICE_DENSITY_2Gb only if !ONENAND_IS_DDP()

Maybe this portion should be reworked because I am unsure if this is a
missing fall through or a bug.

>  
>  	case ONENAND_DEVICE_DENSITY_1Gb:
>  		/* A-Die has all block unlock */
> diff --git a/drivers/mtd/nand/raw/diskonchip.c b/drivers/mtd/nand/raw/diskonchip.c
> index 53f57e0f007e..ead54c90f2d1 100644
> --- a/drivers/mtd/nand/raw/diskonchip.c
> +++ b/drivers/mtd/nand/raw/diskonchip.c
> @@ -1477,6 +1477,7 @@ static int __init doc_probe(unsigned long physadr)
>  			break;
>  		case DOC_ChipID_DocMilPlus32:
>  			pr_err("DiskOnChip Millennium Plus 32MB is not supported, ignoring.\n");
> +			/* fall through */
>  		default:
>  			ret = -ENODEV;
>  			goto notfound;

This is fine.

> diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
> index 96cadead262e..e05ecf2e4269 100644
> --- a/drivers/mtd/nand/raw/nand_base.c
> +++ b/drivers/mtd/nand/raw/nand_base.c
> @@ -5537,6 +5537,7 @@ static int nand_scan_tail(struct nand_chip *chip)
>  		}
>  		if (!ecc->read_page)
>  			ecc->read_page = nand_read_page_hwecc_oob_first;
> +		/* fall through */
>  
>  	case NAND_ECC_HW:
>  		/* Use standard hwecc read page function? */
> @@ -5556,6 +5557,7 @@ static int nand_scan_tail(struct nand_chip *chip)
>  			ecc->read_subpage = nand_read_subpage;
>  		if (!ecc->write_subpage && ecc->hwctl && ecc->calculate)
>  			ecc->write_subpage = nand_write_subpage_hwecc;
> +		/* fall through */
>  
>  	case NAND_ECC_HW_SYNDROME:
>  		if ((!ecc->calculate || !ecc->correct || !ecc->hwctl) &&
> @@ -5593,6 +5595,7 @@ static int nand_scan_tail(struct nand_chip *chip)
>  			ecc->size, mtd->writesize);
>  		ecc->mode = NAND_ECC_SOFT;
>  		ecc->algo = NAND_ECC_HAMMING;
> +		/* fall through */
>  
>  	case NAND_ECC_SOFT:
>  		ret = nand_set_ecc_soft_ops(chip);

These three already are in nand/next.

> diff --git a/drivers/mtd/nand/raw/nand_legacy.c b/drivers/mtd/nand/raw/nand_legacy.c
> index 43575943f13b..f2526ec616a6 100644
> --- a/drivers/mtd/nand/raw/nand_legacy.c
> +++ b/drivers/mtd/nand/raw/nand_legacy.c
> @@ -331,6 +331,7 @@ static void nand_command(struct nand_chip *chip, unsigned int command,
>  		 */
>  		if (column == -1 && page_addr == -1)
>  			return;
> +		/* fall through */
>  
>  	default:
>  		/*
> @@ -483,7 +484,7 @@ static void nand_command_lp(struct nand_chip *chip, unsigned int command,
>  		chip->legacy.cmd_ctrl(chip, NAND_CMD_NONE,
>  				      NAND_NCE | NAND_CTRL_CHANGE);
>  
> -		/* This applies to read commands */
> +		/* fall through - This applies to read commands */
>  	default:
>  		/*
>  		 * If we don't have access to the busy pin, we apply the given

Already fixed in nand/next too.

> diff --git a/drivers/mtd/nand/raw/nandsim.c b/drivers/mtd/nand/raw/nandsim.c
> index 933d1a629c51..edf5fd3d5f07 100644
> --- a/drivers/mtd/nand/raw/nandsim.c
> +++ b/drivers/mtd/nand/raw/nandsim.c
> @@ -2251,9 +2251,11 @@ static int __init ns_init_module(void)
>  
>  	switch (bbt) {
>  	case 2:
> -		 chip->bbt_options |= NAND_BBT_NO_OOB;
> +		chip->bbt_options |= NAND_BBT_NO_OOB;
> +		/* fall through */
>  	case 1:
> -		 chip->bbt_options |= NAND_BBT_USE_FLASH;
> +		chip->bbt_options |= NAND_BBT_USE_FLASH;
> +		/* fall through */
>  	case 0:
>  		break;
>  	default:

This is fine.

> diff --git a/drivers/mtd/nand/raw/nuc900_nand.c b/drivers/mtd/nand/raw/nuc900_nand.c
> index 38b1994e7ed3..56fa84029482 100644
> --- a/drivers/mtd/nand/raw/nuc900_nand.c
> +++ b/drivers/mtd/nand/raw/nuc900_nand.c
> @@ -192,8 +192,9 @@ static void nuc900_nand_command_lp(struct nand_chip *chip,
>  		return;
>  
>  	case NAND_CMD_READ0:
> -
>  		write_cmd_reg(nand, NAND_CMD_READSTART);
> +		/* fall through */
> +
>  	default:
>  
>  		if (!chip->legacy.dev_ready) {

This is fine too.

> diff --git a/drivers/mtd/nand/raw/omap_elm.c b/drivers/mtd/nand/raw/omap_elm.c
> index a3f32f939cc1..94c6401ef32f 100644
> --- a/drivers/mtd/nand/raw/omap_elm.c
> +++ b/drivers/mtd/nand/raw/omap_elm.c
> @@ -465,11 +465,13 @@ static int elm_context_save(struct elm_info *info)
>  					ELM_SYNDROME_FRAGMENT_5 + offset);
>  			regs->elm_syndrome_fragment_4[i] = elm_read_reg(info,
>  					ELM_SYNDROME_FRAGMENT_4 + offset);
> +			/* fall through */
>  		case BCH8_ECC:
>  			regs->elm_syndrome_fragment_3[i] = elm_read_reg(info,
>  					ELM_SYNDROME_FRAGMENT_3 + offset);
>  			regs->elm_syndrome_fragment_2[i] = elm_read_reg(info,
>  					ELM_SYNDROME_FRAGMENT_2 + offset);
> +			/* fall through */
>  		case BCH4_ECC:
>  			regs->elm_syndrome_fragment_1[i] = elm_read_reg(info,
>  					ELM_SYNDROME_FRAGMENT_1 + offset);
> @@ -511,11 +513,13 @@ static int elm_context_restore(struct elm_info *info)
>  					regs->elm_syndrome_fragment_5[i]);
>  			elm_write_reg(info, ELM_SYNDROME_FRAGMENT_4 + offset,
>  					regs->elm_syndrome_fragment_4[i]);
> +			/* fall through */
>  		case BCH8_ECC:
>  			elm_write_reg(info, ELM_SYNDROME_FRAGMENT_3 + offset,
>  					regs->elm_syndrome_fragment_3[i]);
>  			elm_write_reg(info, ELM_SYNDROME_FRAGMENT_2 + offset,
>  					regs->elm_syndrome_fragment_2[i]);
> +			/* fall through */
>  		case BCH4_ECC:
>  			elm_write_reg(info, ELM_SYNDROME_FRAGMENT_1 + offset,
>  					regs->elm_syndrome_fragment_1[i]);

And this is ok as well.


Thanks,
Miquèl

______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/

^ permalink raw reply	[flat|nested] 7+ messages in thread

* Re: [PATCH v2] mtd: rawnand: mark expected switch fall-throughs
  2019-02-05 12:55 ` Miquel Raynal
@ 2019-02-08 17:11   ` Gustavo A. R. Silva
  2019-04-11 18:30   ` Gustavo A. R. Silva
  1 sibling, 0 replies; 7+ messages in thread
From: Gustavo A. R. Silva @ 2019-02-08 17:11 UTC (permalink / raw)
  To: Miquel Raynal
  Cc: Kees Cook, Wan ZongShun, Boris Brezillon, Richard Weinberger,
	linux-kernel, Marek Vasut, Kyungmin Park, linux-mtd,
	Brian Norris, David Woodhouse, linux-arm-kernel

Hey Miquel,

On 2/5/19 6:55 AM, Miquel Raynal wrote:
> Hi Gustavo,
> 
> "Gustavo A. R. Silva" <gustavo@embeddedor.com> wrote on Mon, 28 Jan
> 2019 12:15:20 -0600:
> 
>> In preparation to enabling -Wimplicit-fallthrough, mark switch
>> cases where we are expecting to fall through.
>>
>> This patch fixes the following warning:
>>
>> drivers/mtd/nand/onenand/onenand_base.c:3264:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
>> drivers/mtd/nand/onenand/onenand_base.c:3288:17: warning: this statement may fall through [-Wimplicit-fallthrough=]
>> drivers/mtd/nand/raw/nand_base.c:5538:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
>> drivers/mtd/nand/raw/nand_base.c:5557:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
>> drivers/mtd/nand/raw/nand_base.c:5595:13: warning: this statement may fall through [-Wimplicit-fallthrough=]
>> drivers/mtd/nand/raw/nand_legacy.c:332:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
>> drivers/mtd/nand/raw/nand_legacy.c:483:3: warning: this statement may fall through [-Wimplicit-fallthrough=]
>> drivers/mtd/nand/raw/nandsim.c:2254:22: warning: this statement may fall through [-Wimplicit-fallthrough=]
>> drivers/mtd/nand/raw/omap_elm.c:512:4: warning: this statement may fall through [-Wimplicit-fallthrough=]
>> drivers/mtd/nand/raw/omap_elm.c:517:4: warning: this statement may fall through [-Wimplicit-fallthrough=]
>> drivers/mtd/nand/raw/omap_elm.c:466:37: warning: this statement may fall through [-Wimplicit-fallthrough=]
>> drivers/mtd/nand/raw/omap_elm.c:471:37: warning: this statement may fall through [-Wimplicit-fallthrough=]
>> drivers/mtd/nand/raw/nuc900_nand.c: In function ‘nuc900_nand_command_lp’:
>> ./arch/x86/include/asm/io.h:91:22: warning: this statement may fall through [-Wimplicit-fallthrough=]
>>  #define __raw_writel __writel
>> drivers/mtd/nand/raw/nuc900_nand.c:52:2: note: in expansion of macro ‘__raw_writel’
>>   __raw_writel((val), (dev)->reg + REG_SMCMD)
>>   ^~~~~~~~~~~~
>> drivers/mtd/nand/raw/nuc900_nand.c:196:3: note: in expansion of macro ‘write_cmd_reg’
>>    write_cmd_reg(nand, NAND_CMD_READSTART);
>>    ^~~~~~~~~~~~~
>> drivers/mtd/nand/raw/nuc900_nand.c:197:2: note: here
>>   default:
>>   ^~~~~~~
>>
>> Warning level 3 was used: -Wimplicit-fallthrough=3
>>
>> This patch is part of the ongoing efforts to enabling
>> -Wimplicit-fallthrough.
>>
>> Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
>> ---
>> Changes in v2:
>>  - Add extra /* fall through */ comment in nandsim.c file.
>>
>>  drivers/mtd/nand/onenand/onenand_base.c | 2 ++
>>  drivers/mtd/nand/raw/diskonchip.c       | 1 +
>>  drivers/mtd/nand/raw/nand_base.c        | 3 +++
>>  drivers/mtd/nand/raw/nand_legacy.c      | 3 ++-
>>  drivers/mtd/nand/raw/nandsim.c          | 6 ++++--
>>  drivers/mtd/nand/raw/nuc900_nand.c      | 3 ++-
>>  drivers/mtd/nand/raw/omap_elm.c         | 4 ++++
>>  7 files changed, 18 insertions(+), 4 deletions(-)
>>
>> diff --git a/drivers/mtd/nand/onenand/onenand_base.c b/drivers/mtd/nand/onenand/onenand_base.c
>> index 4ca4b194e7d7..e9b71ad24f50 100644
>> --- a/drivers/mtd/nand/onenand/onenand_base.c
>> +++ b/drivers/mtd/nand/onenand/onenand_base.c
> 
> onenand changes should probably be in a separate patch prefixed
> 
>         mtd: onenand:
> 
> When you are unsure, please run
> 
>         git log --oneline --follow drivers/mtd/nand/onenand/
> 

OK. Got it.

>> @@ -3280,12 +3280,14 @@ static void onenand_check_features(struct mtd_info *mtd)
>>  			if ((this->version_id & 0xf) == 0xe)
>>  				this->options |= ONENAND_HAS_NOP_1;
>>  		}
>> +		/* fall through */
>>  
>>  	case ONENAND_DEVICE_DENSITY_2Gb:
>>  		/* 2Gb DDP does not have 2 plane */
>>  		if (!ONENAND_IS_DDP(this))
>>  			this->options |= ONENAND_HAS_2PLANE;
>>  		this->options |= ONENAND_HAS_UNLOCK_ALL;
>> +		/* fall through */
> 
> This looks strange.
> 
> In ONENAND_DEVICE_DENSITY_2Gb:
> ONENAND_HAS_UNLOCK_ALL is set unconditionally.
> 
> But then, under ONENAND_DEVICE_DENSITY_1Gb, the same option is set only
> if process is evaluated to true.
> 
> Same problem with ONENAND_HAS_2PLANE:
> - it is set in ONENAND_DEVICE_DENSITY_4Gb only if ONENAND_IS_DDP()
> - it is unset in ONENAND_DEVICE_DENSITY_2Gb only if !ONENAND_IS_DDP()
> 
> Maybe this portion should be reworked because I am unsure if this is a
> missing fall through or a bug.
> 

OK. Then, I should probably skip this file for now.

>>  
>>  	case ONENAND_DEVICE_DENSITY_1Gb:
>>  		/* A-Die has all block unlock */
>> diff --git a/drivers/mtd/nand/raw/diskonchip.c b/drivers/mtd/nand/raw/diskonchip.c
>> index 53f57e0f007e..ead54c90f2d1 100644
>> --- a/drivers/mtd/nand/raw/diskonchip.c
>> +++ b/drivers/mtd/nand/raw/diskonchip.c
>> @@ -1477,6 +1477,7 @@ static int __init doc_probe(unsigned long physadr)
>>  			break;
>>  		case DOC_ChipID_DocMilPlus32:
>>  			pr_err("DiskOnChip Millennium Plus 32MB is not supported, ignoring.\n");
>> +			/* fall through */
>>  		default:
>>  			ret = -ENODEV;
>>  			goto notfound;
> 
> This is fine.
> 
>> diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
>> index 96cadead262e..e05ecf2e4269 100644
>> --- a/drivers/mtd/nand/raw/nand_base.c
>> +++ b/drivers/mtd/nand/raw/nand_base.c
>> @@ -5537,6 +5537,7 @@ static int nand_scan_tail(struct nand_chip *chip)
>>  		}
>>  		if (!ecc->read_page)
>>  			ecc->read_page = nand_read_page_hwecc_oob_first;
>> +		/* fall through */
>>  
>>  	case NAND_ECC_HW:
>>  		/* Use standard hwecc read page function? */
>> @@ -5556,6 +5557,7 @@ static int nand_scan_tail(struct nand_chip *chip)
>>  			ecc->read_subpage = nand_read_subpage;
>>  		if (!ecc->write_subpage && ecc->hwctl && ecc->calculate)
>>  			ecc->write_subpage = nand_write_subpage_hwecc;
>> +		/* fall through */
>>  
>>  	case NAND_ECC_HW_SYNDROME:
>>  		if ((!ecc->calculate || !ecc->correct || !ecc->hwctl) &&
>> @@ -5593,6 +5595,7 @@ static int nand_scan_tail(struct nand_chip *chip)
>>  			ecc->size, mtd->writesize);
>>  		ecc->mode = NAND_ECC_SOFT;
>>  		ecc->algo = NAND_ECC_HAMMING;
>> +		/* fall through */
>>  
>>  	case NAND_ECC_SOFT:
>>  		ret = nand_set_ecc_soft_ops(chip);
> 
> These three already are in nand/next.
> 

Great.

>> diff --git a/drivers/mtd/nand/raw/nand_legacy.c b/drivers/mtd/nand/raw/nand_legacy.c
>> index 43575943f13b..f2526ec616a6 100644
>> --- a/drivers/mtd/nand/raw/nand_legacy.c
>> +++ b/drivers/mtd/nand/raw/nand_legacy.c
>> @@ -331,6 +331,7 @@ static void nand_command(struct nand_chip *chip, unsigned int command,
>>  		 */
>>  		if (column == -1 && page_addr == -1)
>>  			return;
>> +		/* fall through */
>>  
>>  	default:
>>  		/*
>> @@ -483,7 +484,7 @@ static void nand_command_lp(struct nand_chip *chip, unsigned int command,
>>  		chip->legacy.cmd_ctrl(chip, NAND_CMD_NONE,
>>  				      NAND_NCE | NAND_CTRL_CHANGE);
>>  
>> -		/* This applies to read commands */
>> +		/* fall through - This applies to read commands */
>>  	default:
>>  		/*
>>  		 * If we don't have access to the busy pin, we apply the given
> 
> Already fixed in nand/next too.
> 

OK. Great.

>> diff --git a/drivers/mtd/nand/raw/nandsim.c b/drivers/mtd/nand/raw/nandsim.c
>> index 933d1a629c51..edf5fd3d5f07 100644
>> --- a/drivers/mtd/nand/raw/nandsim.c
>> +++ b/drivers/mtd/nand/raw/nandsim.c
>> @@ -2251,9 +2251,11 @@ static int __init ns_init_module(void)
>>  
>>  	switch (bbt) {
>>  	case 2:
>> -		 chip->bbt_options |= NAND_BBT_NO_OOB;
>> +		chip->bbt_options |= NAND_BBT_NO_OOB;
>> +		/* fall through */
>>  	case 1:
>> -		 chip->bbt_options |= NAND_BBT_USE_FLASH;
>> +		chip->bbt_options |= NAND_BBT_USE_FLASH;
>> +		/* fall through */
>>  	case 0:
>>  		break;
>>  	default:
> 
> This is fine.
> 
>> diff --git a/drivers/mtd/nand/raw/nuc900_nand.c b/drivers/mtd/nand/raw/nuc900_nand.c
>> index 38b1994e7ed3..56fa84029482 100644
>> --- a/drivers/mtd/nand/raw/nuc900_nand.c
>> +++ b/drivers/mtd/nand/raw/nuc900_nand.c
>> @@ -192,8 +192,9 @@ static void nuc900_nand_command_lp(struct nand_chip *chip,
>>  		return;
>>  
>>  	case NAND_CMD_READ0:
>> -
>>  		write_cmd_reg(nand, NAND_CMD_READSTART);
>> +		/* fall through */
>> +
>>  	default:
>>  
>>  		if (!chip->legacy.dev_ready) {
> 
> This is fine too.
> 
>> diff --git a/drivers/mtd/nand/raw/omap_elm.c b/drivers/mtd/nand/raw/omap_elm.c
>> index a3f32f939cc1..94c6401ef32f 100644
>> --- a/drivers/mtd/nand/raw/omap_elm.c
>> +++ b/drivers/mtd/nand/raw/omap_elm.c
>> @@ -465,11 +465,13 @@ static int elm_context_save(struct elm_info *info)
>>  					ELM_SYNDROME_FRAGMENT_5 + offset);
>>  			regs->elm_syndrome_fragment_4[i] = elm_read_reg(info,
>>  					ELM_SYNDROME_FRAGMENT_4 + offset);
>> +			/* fall through */
>>  		case BCH8_ECC:
>>  			regs->elm_syndrome_fragment_3[i] = elm_read_reg(info,
>>  					ELM_SYNDROME_FRAGMENT_3 + offset);
>>  			regs->elm_syndrome_fragment_2[i] = elm_read_reg(info,
>>  					ELM_SYNDROME_FRAGMENT_2 + offset);
>> +			/* fall through */
>>  		case BCH4_ECC:
>>  			regs->elm_syndrome_fragment_1[i] = elm_read_reg(info,
>>  					ELM_SYNDROME_FRAGMENT_1 + offset);
>> @@ -511,11 +513,13 @@ static int elm_context_restore(struct elm_info *info)
>>  					regs->elm_syndrome_fragment_5[i]);
>>  			elm_write_reg(info, ELM_SYNDROME_FRAGMENT_4 + offset,
>>  					regs->elm_syndrome_fragment_4[i]);
>> +			/* fall through */
>>  		case BCH8_ECC:
>>  			elm_write_reg(info, ELM_SYNDROME_FRAGMENT_3 + offset,
>>  					regs->elm_syndrome_fragment_3[i]);
>>  			elm_write_reg(info, ELM_SYNDROME_FRAGMENT_2 + offset,
>>  					regs->elm_syndrome_fragment_2[i]);
>> +			/* fall through */
>>  		case BCH4_ECC:
>>  			elm_write_reg(info, ELM_SYNDROME_FRAGMENT_1 + offset,
>>  					regs->elm_syndrome_fragment_1[i]);
> 
> And this is ok as well.
> 

I'll leave out the files that have already been addressed and send v3 shortly.

I appreciate your feedback.

Thanks
--
Gustavo

______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/

^ permalink raw reply	[flat|nested] 7+ messages in thread

* Re: [PATCH v2] mtd: rawnand: mark expected switch fall-throughs
  2019-02-05 12:55 ` Miquel Raynal
  2019-02-08 17:11   ` Gustavo A. R. Silva
@ 2019-04-11 18:30   ` Gustavo A. R. Silva
  2019-04-11 22:10     ` Miquel Raynal
  1 sibling, 1 reply; 7+ messages in thread
From: Gustavo A. R. Silva @ 2019-04-11 18:30 UTC (permalink / raw)
  To: Miquel Raynal
  Cc: Kees Cook, Wan ZongShun, Boris Brezillon, Richard Weinberger,
	linux-kernel, Marek Vasut, Kyungmin Park, linux-mtd,
	Brian Norris, David Woodhouse, linux-arm-kernel

Hi Miquel,

On 2/5/19 6:55 AM, Miquel Raynal wrote:
[..]
>> @@ -3280,12 +3280,14 @@ static void onenand_check_features(struct mtd_info *mtd)
>>  			if ((this->version_id & 0xf) == 0xe)
>>  				this->options |= ONENAND_HAS_NOP_1;
>>  		}
>> +		/* fall through */
>>  
>>  	case ONENAND_DEVICE_DENSITY_2Gb:
>>  		/* 2Gb DDP does not have 2 plane */
>>  		if (!ONENAND_IS_DDP(this))
>>  			this->options |= ONENAND_HAS_2PLANE;
>>  		this->options |= ONENAND_HAS_UNLOCK_ALL;
>> +		/* fall through */
> 
> This looks strange.
> 
> In ONENAND_DEVICE_DENSITY_2Gb:
> ONENAND_HAS_UNLOCK_ALL is set unconditionally.
> 
> But then, under ONENAND_DEVICE_DENSITY_1Gb, the same option is set only
> if process is evaluated to true.
> 
> Same problem with ONENAND_HAS_2PLANE:
> - it is set in ONENAND_DEVICE_DENSITY_4Gb only if ONENAND_IS_DDP()
> - it is unset in ONENAND_DEVICE_DENSITY_2Gb only if !ONENAND_IS_DDP()
> 
> Maybe this portion should be reworked because I am unsure if this is a
> missing fall through or a bug.
> 

I wonder if you had the chance to take a look into this piece of code.

Thanks
--
Gustavo

______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/

^ permalink raw reply	[flat|nested] 7+ messages in thread

* Re: [PATCH v2] mtd: rawnand: mark expected switch fall-throughs
  2019-04-11 18:30   ` Gustavo A. R. Silva
@ 2019-04-11 22:10     ` Miquel Raynal
  2019-04-11 22:20       ` Gustavo A. R. Silva
  0 siblings, 1 reply; 7+ messages in thread
From: Miquel Raynal @ 2019-04-11 22:10 UTC (permalink / raw)
  To: Gustavo A. R. Silva
  Cc: Kees Cook, Wan ZongShun, Boris Brezillon, Richard Weinberger,
	linux-kernel, Marek Vasut, Kyungmin Park, linux-mtd,
	Brian Norris, David Woodhouse, linux-arm-kernel

Hi Gustavo,

"Gustavo A. R. Silva" <gustavo@embeddedor.com> wrote on Thu, 11 Apr
2019 13:30:31 -0500:

> Hi Miquel,
> 
> On 2/5/19 6:55 AM, Miquel Raynal wrote:
> [..]
> >> @@ -3280,12 +3280,14 @@ static void onenand_check_features(struct mtd_info *mtd)
> >>  			if ((this->version_id & 0xf) == 0xe)
> >>  				this->options |= ONENAND_HAS_NOP_1;
> >>  		}
> >> +		/* fall through */
> >>  
> >>  	case ONENAND_DEVICE_DENSITY_2Gb:
> >>  		/* 2Gb DDP does not have 2 plane */
> >>  		if (!ONENAND_IS_DDP(this))
> >>  			this->options |= ONENAND_HAS_2PLANE;
> >>  		this->options |= ONENAND_HAS_UNLOCK_ALL;
> >> +		/* fall through */  
> > 
> > This looks strange.
> > 
> > In ONENAND_DEVICE_DENSITY_2Gb:
> > ONENAND_HAS_UNLOCK_ALL is set unconditionally.
> > 
> > But then, under ONENAND_DEVICE_DENSITY_1Gb, the same option is set only
> > if process is evaluated to true.
> > 
> > Same problem with ONENAND_HAS_2PLANE:
> > - it is set in ONENAND_DEVICE_DENSITY_4Gb only if ONENAND_IS_DDP()
> > - it is unset in ONENAND_DEVICE_DENSITY_2Gb only if !ONENAND_IS_DDP()
> > 
> > Maybe this portion should be reworked because I am unsure if this is a
> > missing fall through or a bug.
> >   
> 
> I wonder if you had the chance to take a look into this piece of code.
> 
> Thanks
> --
> Gustavo

What do you mean?


Thanks,
Miquèl

______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/

^ permalink raw reply	[flat|nested] 7+ messages in thread

* Re: [PATCH v2] mtd: rawnand: mark expected switch fall-throughs
  2019-04-11 22:10     ` Miquel Raynal
@ 2019-04-11 22:20       ` Gustavo A. R. Silva
  2019-04-12  7:24         ` Miquel Raynal
  0 siblings, 1 reply; 7+ messages in thread
From: Gustavo A. R. Silva @ 2019-04-11 22:20 UTC (permalink / raw)
  To: Miquel Raynal
  Cc: Kees Cook, Wan ZongShun, Boris Brezillon, Richard Weinberger,
	linux-kernel, Marek Vasut, Kyungmin Park, linux-mtd,
	Brian Norris, David Woodhouse, linux-arm-kernel



On 4/11/19 5:10 PM, Miquel Raynal wrote:
> Hi Gustavo,
> 
> "Gustavo A. R. Silva" <gustavo@embeddedor.com> wrote on Thu, 11 Apr
> 2019 13:30:31 -0500:
> 
>> Hi Miquel,
>>
>> On 2/5/19 6:55 AM, Miquel Raynal wrote:
>> [..]
>>>> @@ -3280,12 +3280,14 @@ static void onenand_check_features(struct mtd_info *mtd)
>>>>  			if ((this->version_id & 0xf) == 0xe)
>>>>  				this->options |= ONENAND_HAS_NOP_1;
>>>>  		}
>>>> +		/* fall through */
>>>>  
>>>>  	case ONENAND_DEVICE_DENSITY_2Gb:
>>>>  		/* 2Gb DDP does not have 2 plane */
>>>>  		if (!ONENAND_IS_DDP(this))
>>>>  			this->options |= ONENAND_HAS_2PLANE;
>>>>  		this->options |= ONENAND_HAS_UNLOCK_ALL;
>>>> +		/* fall through */  
>>>
>>> This looks strange.
>>>
>>> In ONENAND_DEVICE_DENSITY_2Gb:
>>> ONENAND_HAS_UNLOCK_ALL is set unconditionally.
>>>
>>> But then, under ONENAND_DEVICE_DENSITY_1Gb, the same option is set only
>>> if process is evaluated to true.
>>>
>>> Same problem with ONENAND_HAS_2PLANE:
>>> - it is set in ONENAND_DEVICE_DENSITY_4Gb only if ONENAND_IS_DDP()
>>> - it is unset in ONENAND_DEVICE_DENSITY_2Gb only if !ONENAND_IS_DDP()
>>>
>>> Maybe this portion should be reworked because I am unsure if this is a
>>> missing fall through or a bug.
>>>   
>>
>> I wonder if you had the chance to take a look into this piece of code.
>>
>> Thanks
>> --
>> Gustavo
> 
> What do you mean?
> 

You commented that the piece of code above should be reworked. So, it wasn't
clear to me who was going to do that; and that's why I'm asking if you took
a look into it and finally determine whether we are dealing with an actual
bug or a false positive.

Thanks
--
Gustavo



______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/

^ permalink raw reply	[flat|nested] 7+ messages in thread

* Re: [PATCH v2] mtd: rawnand: mark expected switch fall-throughs
  2019-04-11 22:20       ` Gustavo A. R. Silva
@ 2019-04-12  7:24         ` Miquel Raynal
  0 siblings, 0 replies; 7+ messages in thread
From: Miquel Raynal @ 2019-04-12  7:24 UTC (permalink / raw)
  To: Gustavo A. R. Silva
  Cc: Kees Cook, Wan ZongShun, Boris Brezillon, Richard Weinberger,
	linux-kernel, Marek Vasut, Kyungmin Park, linux-mtd,
	Brian Norris, David Woodhouse, linux-arm-kernel

Hi Gustavo,

"Gustavo A. R. Silva" <gustavo@embeddedor.com> wrote on Thu, 11 Apr
2019 17:20:31 -0500:

> On 4/11/19 5:10 PM, Miquel Raynal wrote:
> > Hi Gustavo,
> > 
> > "Gustavo A. R. Silva" <gustavo@embeddedor.com> wrote on Thu, 11 Apr
> > 2019 13:30:31 -0500:
> >   
> >> Hi Miquel,
> >>
> >> On 2/5/19 6:55 AM, Miquel Raynal wrote:
> >> [..]  
> >>>> @@ -3280,12 +3280,14 @@ static void onenand_check_features(struct mtd_info *mtd)
> >>>>  			if ((this->version_id & 0xf) == 0xe)
> >>>>  				this->options |= ONENAND_HAS_NOP_1;
> >>>>  		}
> >>>> +		/* fall through */
> >>>>  
> >>>>  	case ONENAND_DEVICE_DENSITY_2Gb:
> >>>>  		/* 2Gb DDP does not have 2 plane */
> >>>>  		if (!ONENAND_IS_DDP(this))
> >>>>  			this->options |= ONENAND_HAS_2PLANE;
> >>>>  		this->options |= ONENAND_HAS_UNLOCK_ALL;
> >>>> +		/* fall through */    
> >>>
> >>> This looks strange.
> >>>
> >>> In ONENAND_DEVICE_DENSITY_2Gb:
> >>> ONENAND_HAS_UNLOCK_ALL is set unconditionally.
> >>>
> >>> But then, under ONENAND_DEVICE_DENSITY_1Gb, the same option is set only
> >>> if process is evaluated to true.
> >>>
> >>> Same problem with ONENAND_HAS_2PLANE:
> >>> - it is set in ONENAND_DEVICE_DENSITY_4Gb only if ONENAND_IS_DDP()
> >>> - it is unset in ONENAND_DEVICE_DENSITY_2Gb only if !ONENAND_IS_DDP()
> >>>
> >>> Maybe this portion should be reworked because I am unsure if this is a
> >>> missing fall through or a bug.
> >>>     
> >>
> >> I wonder if you had the chance to take a look into this piece of code.
> >>
> >> Thanks
> >> --
> >> Gustavo  
> > 
> > What do you mean?
> >   
> 
> You commented that the piece of code above should be reworked. So, it wasn't
> clear to me who was going to do that; and that's why I'm asking if you took
> a look into it and finally determine whether we are dealing with an actual
> bug or a false positive.

Yes please do it, I don't have the time and I don't plan to do it
myself.


Thanks,
Miquèl

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^ permalink raw reply	[flat|nested] 7+ messages in thread

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Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-01-28 18:15 [PATCH v2] mtd: rawnand: mark expected switch fall-throughs Gustavo A. R. Silva
2019-02-05 12:55 ` Miquel Raynal
2019-02-08 17:11   ` Gustavo A. R. Silva
2019-04-11 18:30   ` Gustavo A. R. Silva
2019-04-11 22:10     ` Miquel Raynal
2019-04-11 22:20       ` Gustavo A. R. Silva
2019-04-12  7:24         ` Miquel Raynal

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