[PATCH] mtd: nand: omap: fix omap_calculate_ecc_bch() for-loop error

[PATCH] mtd: nand: omap: fix omap_calculate_ecc_bch() for-loop error

[ted.juan]

From: "ted.juan" <ted.juan@gmail.com>


 Fixes:  2c9f2365d1e1d0e318b068f683f18c99515b80f8
 mtd: nand: omap: ecc.calculate: merge omap3_calculate_ecc_bch4 in omap_calculate_ecc_bch

 Fixes: 7bcd1dca1d587ad29f9825ba4414620440e8c8da
 mtd: nand: omap: ecc.calculate: merge omap3_calculate_ecc_bch8 in omap_calculate_ecc_bch

Hi Pekon,

Thanks a lot for your comments.
I hope I don't misunderstand what you say.

CC: <stable@vger.kernel.org> # 3.13.x+
Signed-off-by: ted.juan <ted.juan@gmail.com>
Acked-by: Pekon Gupta <pekon@ti.com>
---
 drivers/mtd/nand/omap2.c |   10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/mtd/nand/omap2.c b/drivers/mtd/nand/omap2.c
index 1ff49b8..e21145a 100644
--- a/drivers/mtd/nand/omap2.c
+++ b/drivers/mtd/nand/omap2.c
@@ -1162,7 +1162,7 @@ static int __maybe_unused omap_calculate_ecc_bch(struct mtd_info *mtd,
 	struct gpmc_nand_regs	*gpmc_regs = &info->reg;
 	u8 *ecc_code;
 	unsigned long nsectors, bch_val1, bch_val2, bch_val3, bch_val4;
-	int i;
+	int i, j;
 
 	nsectors = ((readl(info->reg.gpmc_ecc_config) >> 4) & 0x7) + 1;
 	for (i = 0; i < nsectors; i++) {
@@ -1210,8 +1210,8 @@ static int __maybe_unused omap_calculate_ecc_bch(struct mtd_info *mtd,
 		case OMAP_ECC_BCH4_CODE_HW_DETECTION_SW:
 			/* Add constant polynomial to remainder, so that
 			 * ECC of blank pages results in 0x0 on reading back */
-			for (i = 0; i < eccbytes; i++)
-				ecc_calc[i] ^= bch4_polynomial[i];
+			for (j = 0; j < eccbytes; j++)
+				ecc_calc[j] ^= bch4_polynomial[j];
 			break;
 		case OMAP_ECC_BCH4_CODE_HW:
 			/* Set  8th ECC byte as 0x0 for ROM compatibility */
@@ -1220,8 +1220,8 @@ static int __maybe_unused omap_calculate_ecc_bch(struct mtd_info *mtd,
 		case OMAP_ECC_BCH8_CODE_HW_DETECTION_SW:
 			/* Add constant polynomial to remainder, so that
 			 * ECC of blank pages results in 0x0 on reading back */
-			for (i = 0; i < eccbytes; i++)
-				ecc_calc[i] ^= bch8_polynomial[i];
+			for (j = 0; j < eccbytes; j++)
+				ecc_calc[j] ^= bch8_polynomial[j];
 			break;
 		case OMAP_ECC_BCH8_CODE_HW:
 			/* Set 14th ECC byte as 0x0 for ROM compatibility */
-- 
1.7.9.5

[PATCH] mtd: nand: omap: fix omap_calculate_ecc_bch() for-loop error

[ted.juan]

From: "ted.juan" <ted_juan@weintek.com>

 Fixes:  2c9f2365d1e1d0e318b068f683f18c99515b80f8
 mtd: nand: omap: ecc.calculate: merge omap3_calculate_ecc_bch4 in omap_calculate_ecc_bch

 Fixes: 7bcd1dca1d587ad29f9825ba4414620440e8c8da
 mtd: nand: omap: ecc.calculate: merge omap3_calculate_ecc_bch8 in omap_calculate_ecc_bch

CC: <stable@vger.kernel.org> # 3.13.x+
Signed-off-by: ted.juan <ted.juan@gmail.com>
Acked-by: Pekon Gupta <pekon@ti.com>
---
 drivers/mtd/nand/omap2.c |   10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/mtd/nand/omap2.c b/drivers/mtd/nand/omap2.c
index 1ff49b8..e21145a 100644
--- a/drivers/mtd/nand/omap2.c
+++ b/drivers/mtd/nand/omap2.c
@@ -1162,7 +1162,7 @@ static int __maybe_unused omap_calculate_ecc_bch(struct mtd_info *mtd,
 	struct gpmc_nand_regs	*gpmc_regs = &info->reg;
 	u8 *ecc_code;
 	unsigned long nsectors, bch_val1, bch_val2, bch_val3, bch_val4;
-	int i;
+	int i, j;
 
 	nsectors = ((readl(info->reg.gpmc_ecc_config) >> 4) & 0x7) + 1;
 	for (i = 0; i < nsectors; i++) {
@@ -1210,8 +1210,8 @@ static int __maybe_unused omap_calculate_ecc_bch(struct mtd_info *mtd,
 		case OMAP_ECC_BCH4_CODE_HW_DETECTION_SW:
 			/* Add constant polynomial to remainder, so that
 			 * ECC of blank pages results in 0x0 on reading back */
-			for (i = 0; i < eccbytes; i++)
-				ecc_calc[i] ^= bch4_polynomial[i];
+			for (j = 0; j < eccbytes; j++)
+				ecc_calc[j] ^= bch4_polynomial[j];
 			break;
 		case OMAP_ECC_BCH4_CODE_HW:
 			/* Set  8th ECC byte as 0x0 for ROM compatibility */
@@ -1220,8 +1220,8 @@ static int __maybe_unused omap_calculate_ecc_bch(struct mtd_info *mtd,
 		case OMAP_ECC_BCH8_CODE_HW_DETECTION_SW:
 			/* Add constant polynomial to remainder, so that
 			 * ECC of blank pages results in 0x0 on reading back */
-			for (i = 0; i < eccbytes; i++)
-				ecc_calc[i] ^= bch8_polynomial[i];
+			for (j = 0; j < eccbytes; j++)
+				ecc_calc[j] ^= bch8_polynomial[j];
 			break;
 		case OMAP_ECC_BCH8_CODE_HW:
 			/* Set 14th ECC byte as 0x0 for ROM compatibility */
-- 
1.7.9.5

Re: [PATCH] mtd: nand: omap: fix omap_calculate_ecc_bch() for-loop error

[Brian Norris]

Hi Ted,

Sorry, this patch does not apply to l2-mtd.git. I think it conflicts
with some recent changes from Pekon. Please rebase and resend.

On Fri, May 23, 2014 at 11:24:34AM +0800, ted.juan wrote:
> From: "ted.juan" <ted_juan@weintek.com>

Can you format your name properly, without the dot, for proper
authorship attribution?

> 
>  Fixes:  2c9f2365d1e1d0e318b068f683f18c99515b80f8
>  mtd: nand: omap: ecc.calculate: merge omap3_calculate_ecc_bch4 in omap_calculate_ecc_bch
> 
>  Fixes: 7bcd1dca1d587ad29f9825ba4414620440e8c8da
>  mtd: nand: omap: ecc.calculate: merge omap3_calculate_ecc_bch8 in omap_calculate_ecc_bch
> 
> CC: <stable@vger.kernel.org> # 3.13.x+
> Signed-off-by: ted.juan <ted.juan@gmail.com>

Same here.

> Acked-by: Pekon Gupta <pekon@ti.com>
> ---
>  drivers/mtd/nand/omap2.c |   10 +++++-----
>  1 file changed, 5 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/mtd/nand/omap2.c b/drivers/mtd/nand/omap2.c
> index 1ff49b8..e21145a 100644
> --- a/drivers/mtd/nand/omap2.c
> +++ b/drivers/mtd/nand/omap2.c
> @@ -1162,7 +1162,7 @@ static int __maybe_unused omap_calculate_ecc_bch(struct mtd_info *mtd,
>  	struct gpmc_nand_regs	*gpmc_regs = &info->reg;
>  	u8 *ecc_code;
>  	unsigned long nsectors, bch_val1, bch_val2, bch_val3, bch_val4;
> -	int i;
> +	int i, j;
>  
>  	nsectors = ((readl(info->reg.gpmc_ecc_config) >> 4) & 0x7) + 1;
>  	for (i = 0; i < nsectors; i++) {
> @@ -1210,8 +1210,8 @@ static int __maybe_unused omap_calculate_ecc_bch(struct mtd_info *mtd,
>  		case OMAP_ECC_BCH4_CODE_HW_DETECTION_SW:
>  			/* Add constant polynomial to remainder, so that
>  			 * ECC of blank pages results in 0x0 on reading back */
> -			for (i = 0; i < eccbytes; i++)
> -				ecc_calc[i] ^= bch4_polynomial[i];
> +			for (j = 0; j < eccbytes; j++)
> +				ecc_calc[j] ^= bch4_polynomial[j];
>  			break;
>  		case OMAP_ECC_BCH4_CODE_HW:
>  			/* Set  8th ECC byte as 0x0 for ROM compatibility */
> @@ -1220,8 +1220,8 @@ static int __maybe_unused omap_calculate_ecc_bch(struct mtd_info *mtd,
>  		case OMAP_ECC_BCH8_CODE_HW_DETECTION_SW:
>  			/* Add constant polynomial to remainder, so that
>  			 * ECC of blank pages results in 0x0 on reading back */
> -			for (i = 0; i < eccbytes; i++)
> -				ecc_calc[i] ^= bch8_polynomial[i];
> +			for (j = 0; j < eccbytes; j++)
> +				ecc_calc[j] ^= bch8_polynomial[j];
>  			break;
>  		case OMAP_ECC_BCH8_CODE_HW:
>  			/* Set 14th ECC byte as 0x0 for ROM compatibility */

Thanks,
Brian

[PATCH] mtd: nand: omap: fix omap_calculate_ecc_bch() for-loop error

[Ted Juan]

Hi Brian,

>>Sorry, this patch does not apply to l2-mtd.git. I think it conflicts
>>with some recent changes from Pekon. Please rebase and resend.

ok, this should fix it.

>>Can you format your name properly, without the dot, for proper
>>authorship attribution?

ok, thank you.


 Fixes:  2c9f2365d1e1d0e318b068f683f18c99515b80f8
 mtd: nand: omap: ecc.calculate: merge omap3_calculate_ecc_bch4 in omap_calculate_ecc_bch

 Fixes: 7bcd1dca1d587ad29f9825ba4414620440e8c8da
 mtd: nand: omap: ecc.calculate: merge omap3_calculate_ecc_bch8 in omap_calculate_ecc_bch

CC: <stable@vger.kernel.org> # 3.13.x+
Signed-off-by: Ted Juan <ted.juan@gmail.com>
Acked-by: Pekon Gupta <pekon@ti.com>
---
 drivers/mtd/nand/omap2.c |   10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/mtd/nand/omap2.c b/drivers/mtd/nand/omap2.c
index cbe87a8..f0ed92e 100644
--- a/drivers/mtd/nand/omap2.c
+++ b/drivers/mtd/nand/omap2.c
@@ -1180,7 +1180,7 @@ static int __maybe_unused omap_calculate_ecc_bch(struct mtd_info *mtd,
 	u8 *ecc_code;
 	unsigned long nsectors, bch_val1, bch_val2, bch_val3, bch_val4;
 	u32 val;
-	int i;
+	int i, j;
 
 	nsectors = ((readl(info->reg.gpmc_ecc_config) >> 4) & 0x7) + 1;
 	for (i = 0; i < nsectors; i++) {
@@ -1263,8 +1263,8 @@ static int __maybe_unused omap_calculate_ecc_bch(struct mtd_info *mtd,
 		case OMAP_ECC_BCH4_CODE_HW_DETECTION_SW:
 			/* Add constant polynomial to remainder, so that
 			 * ECC of blank pages results in 0x0 on reading back */
-			for (i = 0; i < eccbytes; i++)
-				ecc_calc[i] ^= bch4_polynomial[i];
+			for (j = 0; j < eccbytes; j++)
+				ecc_calc[j] ^= bch4_polynomial[j];
 			break;
 		case OMAP_ECC_BCH4_CODE_HW:
 			/* Set  8th ECC byte as 0x0 for ROM compatibility */
@@ -1273,8 +1273,8 @@ static int __maybe_unused omap_calculate_ecc_bch(struct mtd_info *mtd,
 		case OMAP_ECC_BCH8_CODE_HW_DETECTION_SW:
 			/* Add constant polynomial to remainder, so that
 			 * ECC of blank pages results in 0x0 on reading back */
-			for (i = 0; i < eccbytes; i++)
-				ecc_calc[i] ^= bch8_polynomial[i];
+			for (j = 0; j < eccbytes; j++)
+				ecc_calc[j] ^= bch8_polynomial[j];
 			break;
 		case OMAP_ECC_BCH8_CODE_HW:
 			/* Set 14th ECC byte as 0x0 for ROM compatibility */
-- 
1.7.9.5

Re: [PATCH] mtd: nand: omap: fix omap_calculate_ecc_bch() for-loop error

[Brian Norris]

Hi Ted,

On Wed, May 28, 2014 at 10:33:06PM +0800, Ted Juan wrote:
> >>Sorry, this patch does not apply to l2-mtd.git. I think it conflicts
> >>with some recent changes from Pekon. Please rebase and resend.
> 
> ok, this should fix it.

This is better. It still doesn't work out perfectly, since you included
this conversation within the commit area. In the future, you might try
testing your email by applying using 'git am' to your own tree first,
just to see how it looks.

> >>Can you format your name properly, without the dot, for proper
> >>authorship attribution?
> 
> ok, thank you.
> 
> 
>  Fixes:  2c9f2365d1e1d0e318b068f683f18c99515b80f8
>  mtd: nand: omap: ecc.calculate: merge omap3_calculate_ecc_bch4 in omap_calculate_ecc_bch
> 
>  Fixes: 7bcd1dca1d587ad29f9825ba4414620440e8c8da
>  mtd: nand: omap: ecc.calculate: merge omap3_calculate_ecc_bch8 in omap_calculate_ecc_bch
> 
> CC: <stable@vger.kernel.org> # 3.13.x+
> Signed-off-by: Ted Juan <ted.juan@gmail.com>
> Acked-by: Pekon Gupta <pekon@ti.com>

I fixed up the commit message slightly and pushed to l2-mtd.git. Thanks!

> ---
>  drivers/mtd/nand/omap2.c |   10 +++++-----
>  1 file changed, 5 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/mtd/nand/omap2.c b/drivers/mtd/nand/omap2.c
> index cbe87a8..f0ed92e 100644
> --- a/drivers/mtd/nand/omap2.c
> +++ b/drivers/mtd/nand/omap2.c
> @@ -1180,7 +1180,7 @@ static int __maybe_unused omap_calculate_ecc_bch(struct mtd_info *mtd,
>  	u8 *ecc_code;
>  	unsigned long nsectors, bch_val1, bch_val2, bch_val3, bch_val4;
>  	u32 val;
> -	int i;
> +	int i, j;
>  
>  	nsectors = ((readl(info->reg.gpmc_ecc_config) >> 4) & 0x7) + 1;
>  	for (i = 0; i < nsectors; i++) {
> @@ -1263,8 +1263,8 @@ static int __maybe_unused omap_calculate_ecc_bch(struct mtd_info *mtd,
>  		case OMAP_ECC_BCH4_CODE_HW_DETECTION_SW:
>  			/* Add constant polynomial to remainder, so that
>  			 * ECC of blank pages results in 0x0 on reading back */
> -			for (i = 0; i < eccbytes; i++)
> -				ecc_calc[i] ^= bch4_polynomial[i];
> +			for (j = 0; j < eccbytes; j++)
> +				ecc_calc[j] ^= bch4_polynomial[j];
>  			break;
>  		case OMAP_ECC_BCH4_CODE_HW:
>  			/* Set  8th ECC byte as 0x0 for ROM compatibility */
> @@ -1273,8 +1273,8 @@ static int __maybe_unused omap_calculate_ecc_bch(struct mtd_info *mtd,
>  		case OMAP_ECC_BCH8_CODE_HW_DETECTION_SW:
>  			/* Add constant polynomial to remainder, so that
>  			 * ECC of blank pages results in 0x0 on reading back */
> -			for (i = 0; i < eccbytes; i++)
> -				ecc_calc[i] ^= bch8_polynomial[i];
> +			for (j = 0; j < eccbytes; j++)
> +				ecc_calc[j] ^= bch8_polynomial[j];
>  			break;
>  		case OMAP_ECC_BCH8_CODE_HW:
>  			/* Set 14th ECC byte as 0x0 for ROM compatibility */

Brian

Re: [PATCH] mtd: nand: omap: fix omap_calculate_ecc_bch() for-loop error

[Ted Juan]

Hi Pekon,

When I add "CC: <stable@vger.kernel.org> # 3.13.x+" in patch, then git
send-email.

There are some warning message as blow. Should I fix it?
And which stable version I should mark?

Thanks.

(mbox) Adding cc: "ted.juan" <ted_juan@weintek.com> from line 'From:
"ted.juan" <ted_juan@weintek.com>'
(body) Adding cc: <stable@vger.kernel.org> # 3.13.x+ from line 'CC:
<stable@vger.kernel.org> # 3.13.x+'
Use of uninitialized value $cc in string eq at
/usr/lib/git-core/git-send-email line 983.
Use of uninitialized value $cc in quotemeta at
/usr/lib/git-core/git-send-email line 983.
W: unable to extract a valid address from: <stable@vger.kernel.org> # 3.13.x+
W: unable to extract a valid address from: <stable@vger.kernel.org> # 3.13.x+


2014-05-23 10:54 GMT+08:00 ted.juan <ted.juan@gmail.com>:
> From: "ted.juan" <ted.juan@gmail.com>
>
>
>  Fixes:  2c9f2365d1e1d0e318b068f683f18c99515b80f8
>  mtd: nand: omap: ecc.calculate: merge omap3_calculate_ecc_bch4 in omap_calculate_ecc_bch
>
>  Fixes: 7bcd1dca1d587ad29f9825ba4414620440e8c8da
>  mtd: nand: omap: ecc.calculate: merge omap3_calculate_ecc_bch8 in omap_calculate_ecc_bch
>
> Hi Pekon,
>
> Thanks a lot for your comments.
> I hope I don't misunderstand what you say.
>
> CC: <stable@vger.kernel.org> # 3.13.x+
> Signed-off-by: ted.juan <ted.juan@gmail.com>
> Acked-by: Pekon Gupta <pekon@ti.com>
> ---
>  drivers/mtd/nand/omap2.c |   10 +++++-----
>  1 file changed, 5 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/mtd/nand/omap2.c b/drivers/mtd/nand/omap2.c
> index 1ff49b8..e21145a 100644
> --- a/drivers/mtd/nand/omap2.c
> +++ b/drivers/mtd/nand/omap2.c
> @@ -1162,7 +1162,7 @@ static int __maybe_unused omap_calculate_ecc_bch(struct mtd_info *mtd,
>         struct gpmc_nand_regs   *gpmc_regs = &info->reg;
>         u8 *ecc_code;
>         unsigned long nsectors, bch_val1, bch_val2, bch_val3, bch_val4;
> -       int i;
> +       int i, j;
>
>         nsectors = ((readl(info->reg.gpmc_ecc_config) >> 4) & 0x7) + 1;
>         for (i = 0; i < nsectors; i++) {
> @@ -1210,8 +1210,8 @@ static int __maybe_unused omap_calculate_ecc_bch(struct mtd_info *mtd,
>                 case OMAP_ECC_BCH4_CODE_HW_DETECTION_SW:
>                         /* Add constant polynomial to remainder, so that
>                          * ECC of blank pages results in 0x0 on reading back */
> -                       for (i = 0; i < eccbytes; i++)
> -                               ecc_calc[i] ^= bch4_polynomial[i];
> +                       for (j = 0; j < eccbytes; j++)
> +                               ecc_calc[j] ^= bch4_polynomial[j];
>                         break;
>                 case OMAP_ECC_BCH4_CODE_HW:
>                         /* Set  8th ECC byte as 0x0 for ROM compatibility */
> @@ -1220,8 +1220,8 @@ static int __maybe_unused omap_calculate_ecc_bch(struct mtd_info *mtd,
>                 case OMAP_ECC_BCH8_CODE_HW_DETECTION_SW:
>                         /* Add constant polynomial to remainder, so that
>                          * ECC of blank pages results in 0x0 on reading back */
> -                       for (i = 0; i < eccbytes; i++)
> -                               ecc_calc[i] ^= bch8_polynomial[i];
> +                       for (j = 0; j < eccbytes; j++)
> +                               ecc_calc[j] ^= bch8_polynomial[j];
>                         break;
>                 case OMAP_ECC_BCH8_CODE_HW:
>                         /* Set 14th ECC byte as 0x0 for ROM compatibility */
> --
> 1.7.9.5
>

RE: [PATCH] mtd: nand: omap: fix omap_calculate_ecc_bch() for-loop error

[Gupta, Pekon]

Hi Ted,

>From: Ted Juan [mailto:ted.juan@gmail.com]

>When I add "CC: <stable@vger.kernel.org> # 3.13.x+" in patch, then git
>send-email.
>
>There are some warning message as blow. Should I fix it?
>And which stable version I should mark?
>
If I'm not wrong, below is my understanding ..

Patches marked for stable are automatically pulled-in by maintainers of
stable trees when those patches get merged and tagged in linus's tree.
This is done by scripts which search "CC: <stable@vger.kernel.org> # <tag>"
in commit log of all patches. Thus "CC: <stable@vger.kernel.org> # 3.13.x+"
here is like a marker for scripts. In practice, you should not directly send
your patch to "stable@vger.kernel.org" mail-list, unless maintainer does so.

So, while sending stable patches use following command to avoid below error
'git send-email ---suppress-cc=bodycc'

Also refer:
http://lists.infradead.org/pipermail/linux-mtd/2014-May/053911.html
[2] Documentation/stable_kernel_rules.txt.


with regards, pekon

>Thanks.
>
>(mbox) Adding cc: "ted.juan" <ted_juan@weintek.com> from line 'From:
>"ted.juan" <ted_juan@weintek.com>'
>(body) Adding cc: <stable@vger.kernel.org> # 3.13.x+ from line 'CC:
><stable@vger.kernel.org> # 3.13.x+'
>Use of uninitialized value $cc in string eq at
>/usr/lib/git-core/git-send-email line 983.
>Use of uninitialized value $cc in quotemeta at
>/usr/lib/git-core/git-send-email line 983.
>W: unable to extract a valid address from: <stable@vger.kernel.org> # 3.13.x+
>W: unable to extract a valid address from: <stable@vger.kernel.org> # 3.13.x+
>

Re: [PATCH] mtd: nand: omap: fix omap_calculate_ecc_bch() for-loop error

[Ted Juan]

Hi Pekon,

Thanks for your patience to answer my question again.



> So, while sending stable patches use following command to avoid below error
> 'git send-email ---suppress-cc=bodycc'
>
> Also refer:
> http://lists.infradead.org/pipermail/linux-mtd/2014-May/053911.html
> [2] Documentation/stable_kernel_rules.txt.

[PATCH] mtd: nand: omap: fix omap_calculate_ecc_bch() for-loop error

[ted.juan]

From: "ted.juan" <ted.juan@gmail.com>


I am sorry that I didn't use the git-send-mail last time.


Signed-off-by: ted.juan <ted.juan@gmail.com>
---
 drivers/mtd/nand/omap2.c |   10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/mtd/nand/omap2.c b/drivers/mtd/nand/omap2.c
index 1ff49b8..e21145a 100644
--- a/drivers/mtd/nand/omap2.c
+++ b/drivers/mtd/nand/omap2.c
@@ -1162,7 +1162,7 @@ static int __maybe_unused omap_calculate_ecc_bch(struct mtd_info *mtd,
 	struct gpmc_nand_regs	*gpmc_regs = &info->reg;
 	u8 *ecc_code;
 	unsigned long nsectors, bch_val1, bch_val2, bch_val3, bch_val4;
-	int i;
+	int i, j;
 
 	nsectors = ((readl(info->reg.gpmc_ecc_config) >> 4) & 0x7) + 1;
 	for (i = 0; i < nsectors; i++) {
@@ -1210,8 +1210,8 @@ static int __maybe_unused omap_calculate_ecc_bch(struct mtd_info *mtd,
 		case OMAP_ECC_BCH4_CODE_HW_DETECTION_SW:
 			/* Add constant polynomial to remainder, so that
 			 * ECC of blank pages results in 0x0 on reading back */
-			for (i = 0; i < eccbytes; i++)
-				ecc_calc[i] ^= bch4_polynomial[i];
+			for (j = 0; j < eccbytes; j++)
+				ecc_calc[j] ^= bch4_polynomial[j];
 			break;
 		case OMAP_ECC_BCH4_CODE_HW:
 			/* Set  8th ECC byte as 0x0 for ROM compatibility */
@@ -1220,8 +1220,8 @@ static int __maybe_unused omap_calculate_ecc_bch(struct mtd_info *mtd,
 		case OMAP_ECC_BCH8_CODE_HW_DETECTION_SW:
 			/* Add constant polynomial to remainder, so that
 			 * ECC of blank pages results in 0x0 on reading back */
-			for (i = 0; i < eccbytes; i++)
-				ecc_calc[i] ^= bch8_polynomial[i];
+			for (j = 0; j < eccbytes; j++)
+				ecc_calc[j] ^= bch8_polynomial[j];
 			break;
 		case OMAP_ECC_BCH8_CODE_HW:
 			/* Set 14th ECC byte as 0x0 for ROM compatibility */
-- 
1.7.9.5

[PATCH] mtd: nand: omap: fix omap_calculate_ecc_bch() for-loop error

[Ted Juan]

The patch is mirror issue that the for-loop use the same variable.


Signed-off-by: ted.juan <ted.juan@gmail.com>
---
 drivers/mtd/nand/omap2.c |   10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/mtd/nand/omap2.c b/drivers/mtd/nand/omap2.c
index 1ff49b8..e21145a 100644
--- a/drivers/mtd/nand/omap2.c
+++ b/drivers/mtd/nand/omap2.c
@@ -1162,7 +1162,7 @@ static int __maybe_unused
omap_calculate_ecc_bch(struct mtd_info *mtd,
        struct gpmc_nand_regs   *gpmc_regs = &info->reg;
        u8 *ecc_code;
        unsigned long nsectors, bch_val1, bch_val2, bch_val3, bch_val4;
-       int i;
+       int i, j;

        nsectors = ((readl(info->reg.gpmc_ecc_config) >> 4) & 0x7) + 1;
        for (i = 0; i < nsectors; i++) {
@@ -1210,8 +1210,8 @@ static int __maybe_unused
omap_calculate_ecc_bch(struct mtd_info *mtd,
                case OMAP_ECC_BCH4_CODE_HW_DETECTION_SW:
                        /* Add constant polynomial to remainder, so that
                         * ECC of blank pages results in 0x0 on reading back */
-                       for (i = 0; i < eccbytes; i++)
-                               ecc_calc[i] ^= bch4_polynomial[i];
+                       for (j = 0; j < eccbytes; j++)
+                               ecc_calc[j] ^= bch4_polynomial[j];
                        break;
                case OMAP_ECC_BCH4_CODE_HW:
                        /* Set  8th ECC byte as 0x0 for ROM compatibility */
@@ -1220,8 +1220,8 @@ static int __maybe_unused
omap_calculate_ecc_bch(struct mtd_info *mtd,
                case OMAP_ECC_BCH8_CODE_HW_DETECTION_SW:
                        /* Add constant polynomial to remainder, so that
                         * ECC of blank pages results in 0x0 on reading back */
-                       for (i = 0; i < eccbytes; i++)
-                               ecc_calc[i] ^= bch8_polynomial[i];
+                       for (j = 0; j < eccbytes; j++)
+                               ecc_calc[j] ^= bch8_polynomial[j];
                        break;
                case OMAP_ECC_BCH8_CODE_HW:
                        /* Set 14th ECC byte as 0x0 for ROM compatibility */
-- 
1.7.9.5

RE: [PATCH] mtd: nand: omap: fix omap_calculate_ecc_bch() for-loop error

[Gupta, Pekon]

Hi Ted,

>From: Ted Juan [mailto:ted.juan@gmail.com]
>
>The patch is mirror issue that the for-loop use the same variable.
>
>
>Signed-off-by: ted.juan <ted.juan@gmail.com>
>---
> drivers/mtd/nand/omap2.c |   10 +++++-----
> 1 file changed, 5 insertions(+), 5 deletions(-)
>
>diff --git a/drivers/mtd/nand/omap2.c b/drivers/mtd/nand/omap2.c
>index 1ff49b8..e21145a 100644
>--- a/drivers/mtd/nand/omap2.c
>+++ b/drivers/mtd/nand/omap2.c
>@@ -1162,7 +1162,7 @@ static int __maybe_unused
>omap_calculate_ecc_bch(struct mtd_info *mtd,
>        struct gpmc_nand_regs   *gpmc_regs = &info->reg;
>        u8 *ecc_code;
>        unsigned long nsectors, bch_val1, bch_val2, bch_val3, bch_val4;
>-       int i;
>+       int i, j;
>
>        nsectors = ((readl(info->reg.gpmc_ecc_config) >> 4) & 0x7) + 1;
>        for (i = 0; i < nsectors; i++) {
>@@ -1210,8 +1210,8 @@ static int __maybe_unused
>omap_calculate_ecc_bch(struct mtd_info *mtd,
>                case OMAP_ECC_BCH4_CODE_HW_DETECTION_SW:
>                        /* Add constant polynomial to remainder, so that
>                         * ECC of blank pages results in 0x0 on reading back */
>-                       for (i = 0; i < eccbytes; i++)
>-                               ecc_calc[i] ^= bch4_polynomial[i];
>+                       for (j = 0; j < eccbytes; j++)
>+                               ecc_calc[j] ^= bch4_polynomial[j];
>                        break;
>                case OMAP_ECC_BCH4_CODE_HW:
>                        /* Set  8th ECC byte as 0x0 for ROM compatibility */
>@@ -1220,8 +1220,8 @@ static int __maybe_unused
>omap_calculate_ecc_bch(struct mtd_info *mtd,
>                case OMAP_ECC_BCH8_CODE_HW_DETECTION_SW:
>                        /* Add constant polynomial to remainder, so that
>                         * ECC of blank pages results in 0x0 on reading back */
>-                       for (i = 0; i < eccbytes; i++)
>-                               ecc_calc[i] ^= bch8_polynomial[i];
>+                       for (j = 0; j < eccbytes; j++)
>+                               ecc_calc[j] ^= bch8_polynomial[j];
>                        break;
>                case OMAP_ECC_BCH8_CODE_HW:
>                        /* Set 14th ECC byte as 0x0 for ROM compatibility */
>--
>1.7.9.5

Thanks much for catching and fixing this..

Fixes:  2c9f2365d1e1d0e318b068f683f18c99515b80f8
mtd: nand: omap: ecc.calculate: merge omap3_calculate_ecc_bch4 in omap_calculate_ecc_bch

Fixes: 7bcd1dca1d587ad29f9825ba4414620440e8c8da
mtd: nand: omap: ecc.calculate: merge omap3_calculate_ecc_bch8 in omap_calculate_ecc_bch

Acked-by: Pekon Gupta <pekon@ti.com>


with regards, pekon

Re: [PATCH] mtd: nand: omap: fix omap_calculate_ecc_bch() for-loop error

[Brian Norris]

On Fri, May 16, 2014 at 05:38:51PM +0800, Ted Juan wrote:
> The patch is mirror issue that the for-loop use the same variable.
> 
> 
> Signed-off-by: ted.juan <ted.juan@gmail.com>

Please fix your whitespace and line wrapping. I cannot apply your patch:

Applying: mtd: nand: omap: fix omap_calculate_ecc_bch() for-loop error
fatal: corrupt patch at line 10
Patch failed at 0001 mtd: nand: omap: fix omap_calculate_ecc_bch() for-loop error
The copy of the patch that failed is found in:
   /home/norris/git/l2-mtd/.git/rebase-apply/patch
When you have resolved this problem, run "git am --resolved".
If you prefer to skip this patch, run "git am --skip" instead.
To restore the original branch and stop patching, run "git am --abort".

Brian