Kernel 5.10-rc1 not mounting NAND flash (Bisected to d7157ff49a5b ("mtd: rawnand: Use the ECC framework user input parsing bits"))

Kernel 5.10-rc1 not mounting NAND flash (Bisected to d7157ff49a5b ("mtd: rawnand: Use the ECC framework user input parsing bits"))

[Christophe Leroy]

Hi Miquel,

I'm unable to boot 5.10-rc1 on my boards. I get the following error:

[    4.125811] nand: device found, Manufacturer ID: 0xad, Chip ID: 0x76
[    4.131992] nand: Hynix NAND 64MiB 3,3V 8-bit
[    4.136173] nand: 64 MiB, SLC, erase size: 16 KiB, page size: 512,  
OOB size: 16
[    4.143534] ------------[ cut here ]------------
[    4.147934] Unsupported ECC algorithm!
[    4.152142] WARNING: CPU: 0 PID: 1 at  
drivers/mtd/nand/raw/nand_base.c:5244 nand_scan_with_ids+0x1260/0x1640
...
[    4.332052] ---[ end trace e3a36f62cae4ac56 ]---
[    4.336882] gpio-nand: probe of c0000000.nand failed with error -22

Bisected to commit d7157ff49a5b ("mtd: rawnand: Use the ECC framework  
user input parsing bits")

My first impression is that with that change, the value set in chip->ecc.algo
by gpio_nand_probe() in drivers/mtd/nand/raw/gpio.c gets overwritten  
in rawnand_dt_init()

The following change fixes the problem, though I'm not sure it is the  
right fix. Can you have a look ?

diff --git a/drivers/mtd/nand/raw/nand_base.c  
b/drivers/mtd/nand/raw/nand_base.c
index 1f0d542d5923..aa74797cf2da 100644
--- a/drivers/mtd/nand/raw/nand_base.c
+++ b/drivers/mtd/nand/raw/nand_base.c
@@ -5032,7 +5032,8 @@ static int rawnand_dt_init(struct nand_chip *chip)
  		chip->ecc.engine_type = nand->ecc.defaults.engine_type;

  	chip->ecc.placement = nand->ecc.user_conf.placement;
-	chip->ecc.algo = nand->ecc.user_conf.algo;
+	if (chip->ecc.algo == NAND_ECC_ALGO_UNKNOWN)
+		chip->ecc.algo = nand->ecc.user_conf.algo;
  	chip->ecc.strength = nand->ecc.user_conf.strength;
  	chip->ecc.size = nand->ecc.user_conf.step_size;

---

Thanks
Christophe

Kernel 5.10-rc1 not mounting NAND flash (Bisected to d7157ff49a5b ("mtd: rawnand: Use the ECC framework user input parsing bits"))

[Christophe Leroy]

Hi Miquel,

I'm unable to boot 5.10-rc1 on my boards. I get the following error:

[    4.125811] nand: device found, Manufacturer ID: 0xad, Chip ID: 0x76
[    4.131992] nand: Hynix NAND 64MiB 3,3V 8-bit
[    4.136173] nand: 64 MiB, SLC, erase size: 16 KiB, page size: 512,  
OOB size: 16
[    4.143534] ------------[ cut here ]------------
[    4.147934] Unsupported ECC algorithm!
[    4.152142] WARNING: CPU: 0 PID: 1 at  
drivers/mtd/nand/raw/nand_base.c:5244 nand_scan_with_ids+0x1260/0x1640
...
[    4.332052] ---[ end trace e3a36f62cae4ac56 ]---
[    4.336882] gpio-nand: probe of c0000000.nand failed with error -22

Bisected to commit d7157ff49a5b ("mtd: rawnand: Use the ECC framework  
user input parsing bits")

My first impression is that with that change, the value set in chip->ecc.algo
by gpio_nand_probe() in drivers/mtd/nand/raw/gpio.c gets overwritten  
in rawnand_dt_init()

The following change fixes the problem, though I'm not sure it is the  
right fix. Can you have a look ?

diff --git a/drivers/mtd/nand/raw/nand_base.c  
b/drivers/mtd/nand/raw/nand_base.c
index 1f0d542d5923..aa74797cf2da 100644
--- a/drivers/mtd/nand/raw/nand_base.c
+++ b/drivers/mtd/nand/raw/nand_base.c
@@ -5032,7 +5032,8 @@ static int rawnand_dt_init(struct nand_chip *chip)
  		chip->ecc.engine_type = nand->ecc.defaults.engine_type;

  	chip->ecc.placement = nand->ecc.user_conf.placement;
-	chip->ecc.algo = nand->ecc.user_conf.algo;
+	if (chip->ecc.algo == NAND_ECC_ALGO_UNKNOWN)
+		chip->ecc.algo = nand->ecc.user_conf.algo;
  	chip->ecc.strength = nand->ecc.user_conf.strength;
  	chip->ecc.size = nand->ecc.user_conf.step_size;

---

Thanks
Christophe

Kernel 5.10-rc1 not mounting NAND flash (Bisected to d7157ff49a5b ("mtd: rawnand: Use the ECC framework user input parsing bits"))

[Christophe Leroy]

Hi Miquel,

I'm unable to boot 5.10-rc1 on my boards. I get the following error:

[    4.125811] nand: device found, Manufacturer ID: 0xad, Chip ID: 0x76
[    4.131992] nand: Hynix NAND 64MiB 3,3V 8-bit
[    4.136173] nand: 64 MiB, SLC, erase size: 16 KiB, page size: 512,  
OOB size: 16
[    4.143534] ------------[ cut here ]------------
[    4.147934] Unsupported ECC algorithm!
[    4.152142] WARNING: CPU: 0 PID: 1 at  
drivers/mtd/nand/raw/nand_base.c:5244 nand_scan_with_ids+0x1260/0x1640
...
[    4.332052] ---[ end trace e3a36f62cae4ac56 ]---
[    4.336882] gpio-nand: probe of c0000000.nand failed with error -22

Bisected to commit d7157ff49a5b ("mtd: rawnand: Use the ECC framework  
user input parsing bits")

My first impression is that with that change, the value set in chip->ecc.algo
by gpio_nand_probe() in drivers/mtd/nand/raw/gpio.c gets overwritten  
in rawnand_dt_init()

The following change fixes the problem, though I'm not sure it is the  
right fix. Can you have a look ?

diff --git a/drivers/mtd/nand/raw/nand_base.c  
b/drivers/mtd/nand/raw/nand_base.c
index 1f0d542d5923..aa74797cf2da 100644
--- a/drivers/mtd/nand/raw/nand_base.c
+++ b/drivers/mtd/nand/raw/nand_base.c
@@ -5032,7 +5032,8 @@ static int rawnand_dt_init(struct nand_chip *chip)
  		chip->ecc.engine_type = nand->ecc.defaults.engine_type;

  	chip->ecc.placement = nand->ecc.user_conf.placement;
-	chip->ecc.algo = nand->ecc.user_conf.algo;
+	if (chip->ecc.algo == NAND_ECC_ALGO_UNKNOWN)
+		chip->ecc.algo = nand->ecc.user_conf.algo;
  	chip->ecc.strength = nand->ecc.user_conf.strength;
  	chip->ecc.size = nand->ecc.user_conf.step_size;

---

Thanks
Christophe

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

Re: Kernel 5.10-rc1 not mounting NAND flash (Bisected to d7157ff49a5b ("mtd: rawnand: Use the ECC framework user input parsing bits"))

[Miquel Raynal]

Hi Christophe,

Christophe Leroy <christophe.leroy@csgroup.eu> wrote on Wed, 04 Nov
2020 18:33:53 +0100:

> Hi Miquel,
> 
> I'm unable to boot 5.10-rc1 on my boards. I get the following error:
> 
> [    4.125811] nand: device found, Manufacturer ID: 0xad, Chip ID: 0x76
> [    4.131992] nand: Hynix NAND 64MiB 3,3V 8-bit
> [    4.136173] nand: 64 MiB, SLC, erase size: 16 KiB, page size: 512, OOB size: 16
> [    4.143534] ------------[ cut here ]------------
> [    4.147934] Unsupported ECC algorithm!
> [    4.152142] WARNING: CPU: 0 PID: 1 at drivers/mtd/nand/raw/nand_base.c:5244 nand_scan_with_ids+0x1260/0x1640
> ...
> [    4.332052] ---[ end trace e3a36f62cae4ac56 ]---
> [    4.336882] gpio-nand: probe of c0000000.nand failed with error -22
> 
> Bisected to commit d7157ff49a5b ("mtd: rawnand: Use the ECC framework user input parsing bits")
> 
> My first impression is that with that change, the value set in chip->ecc.algo
> by gpio_nand_probe() in drivers/mtd/nand/raw/gpio.c gets overwritten in rawnand_dt_init()
> 
> The following change fixes the problem, though I'm not sure it is the right fix. Can you have a look ?
> 
> diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
> index 1f0d542d5923..aa74797cf2da 100644
> --- a/drivers/mtd/nand/raw/nand_base.c
> +++ b/drivers/mtd/nand/raw/nand_base.c
> @@ -5032,7 +5032,8 @@ static int rawnand_dt_init(struct nand_chip *chip)
>   		chip->ecc.engine_type = nand->ecc.defaults.engine_type;
> 
>   	chip->ecc.placement = nand->ecc.user_conf.placement;
> -	chip->ecc.algo = nand->ecc.user_conf.algo;
> +	if (chip->ecc.algo == NAND_ECC_ALGO_UNKNOWN)
> +		chip->ecc.algo = nand->ecc.user_conf.algo;
>   	chip->ecc.strength = nand->ecc.user_conf.strength;
>   	chip->ecc.size = nand->ecc.user_conf.step_size;
> 
> ---
> 
> Thanks
> Christophe

Sorry for introducing this issue, I didn't had the time to send the
Fixes PR yet but I think this issue has been solved already. Could
you please try with a recent linux-next?

Thanks,
Miquèl

Re: Kernel 5.10-rc1 not mounting NAND flash (Bisected to d7157ff49a5b ("mtd: rawnand: Use the ECC framework user input parsing bits"))

[Miquel Raynal]

Hi Christophe,

Christophe Leroy <christophe.leroy@csgroup.eu> wrote on Wed, 04 Nov
2020 18:33:53 +0100:

> Hi Miquel,
> 
> I'm unable to boot 5.10-rc1 on my boards. I get the following error:
> 
> [    4.125811] nand: device found, Manufacturer ID: 0xad, Chip ID: 0x76
> [    4.131992] nand: Hynix NAND 64MiB 3,3V 8-bit
> [    4.136173] nand: 64 MiB, SLC, erase size: 16 KiB, page size: 512, OOB size: 16
> [    4.143534] ------------[ cut here ]------------
> [    4.147934] Unsupported ECC algorithm!
> [    4.152142] WARNING: CPU: 0 PID: 1 at drivers/mtd/nand/raw/nand_base.c:5244 nand_scan_with_ids+0x1260/0x1640
> ...
> [    4.332052] ---[ end trace e3a36f62cae4ac56 ]---
> [    4.336882] gpio-nand: probe of c0000000.nand failed with error -22
> 
> Bisected to commit d7157ff49a5b ("mtd: rawnand: Use the ECC framework user input parsing bits")
> 
> My first impression is that with that change, the value set in chip->ecc.algo
> by gpio_nand_probe() in drivers/mtd/nand/raw/gpio.c gets overwritten in rawnand_dt_init()
> 
> The following change fixes the problem, though I'm not sure it is the right fix. Can you have a look ?
> 
> diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
> index 1f0d542d5923..aa74797cf2da 100644
> --- a/drivers/mtd/nand/raw/nand_base.c
> +++ b/drivers/mtd/nand/raw/nand_base.c
> @@ -5032,7 +5032,8 @@ static int rawnand_dt_init(struct nand_chip *chip)
>   		chip->ecc.engine_type = nand->ecc.defaults.engine_type;
> 
>   	chip->ecc.placement = nand->ecc.user_conf.placement;
> -	chip->ecc.algo = nand->ecc.user_conf.algo;
> +	if (chip->ecc.algo == NAND_ECC_ALGO_UNKNOWN)
> +		chip->ecc.algo = nand->ecc.user_conf.algo;
>   	chip->ecc.strength = nand->ecc.user_conf.strength;
>   	chip->ecc.size = nand->ecc.user_conf.step_size;
> 
> ---
> 
> Thanks
> Christophe

Sorry for introducing this issue, I didn't had the time to send the
Fixes PR yet but I think this issue has been solved already. Could
you please try with a recent linux-next?

Thanks,
Miquèl

Re: Kernel 5.10-rc1 not mounting NAND flash (Bisected to d7157ff49a5b ("mtd: rawnand: Use the ECC framework user input parsing bits"))

[Miquel Raynal]

Hi Christophe,

Christophe Leroy <christophe.leroy@csgroup.eu> wrote on Wed, 04 Nov
2020 18:33:53 +0100:

> Hi Miquel,
> 
> I'm unable to boot 5.10-rc1 on my boards. I get the following error:
> 
> [    4.125811] nand: device found, Manufacturer ID: 0xad, Chip ID: 0x76
> [    4.131992] nand: Hynix NAND 64MiB 3,3V 8-bit
> [    4.136173] nand: 64 MiB, SLC, erase size: 16 KiB, page size: 512, OOB size: 16
> [    4.143534] ------------[ cut here ]------------
> [    4.147934] Unsupported ECC algorithm!
> [    4.152142] WARNING: CPU: 0 PID: 1 at drivers/mtd/nand/raw/nand_base.c:5244 nand_scan_with_ids+0x1260/0x1640
> ...
> [    4.332052] ---[ end trace e3a36f62cae4ac56 ]---
> [    4.336882] gpio-nand: probe of c0000000.nand failed with error -22
> 
> Bisected to commit d7157ff49a5b ("mtd: rawnand: Use the ECC framework user input parsing bits")
> 
> My first impression is that with that change, the value set in chip->ecc.algo
> by gpio_nand_probe() in drivers/mtd/nand/raw/gpio.c gets overwritten in rawnand_dt_init()
> 
> The following change fixes the problem, though I'm not sure it is the right fix. Can you have a look ?
> 
> diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
> index 1f0d542d5923..aa74797cf2da 100644
> --- a/drivers/mtd/nand/raw/nand_base.c
> +++ b/drivers/mtd/nand/raw/nand_base.c
> @@ -5032,7 +5032,8 @@ static int rawnand_dt_init(struct nand_chip *chip)
>   		chip->ecc.engine_type = nand->ecc.defaults.engine_type;
> 
>   	chip->ecc.placement = nand->ecc.user_conf.placement;
> -	chip->ecc.algo = nand->ecc.user_conf.algo;
> +	if (chip->ecc.algo == NAND_ECC_ALGO_UNKNOWN)
> +		chip->ecc.algo = nand->ecc.user_conf.algo;
>   	chip->ecc.strength = nand->ecc.user_conf.strength;
>   	chip->ecc.size = nand->ecc.user_conf.step_size;
> 
> ---
> 
> Thanks
> Christophe

Sorry for introducing this issue, I didn't had the time to send the
Fixes PR yet but I think this issue has been solved already. Could
you please try with a recent linux-next?

Thanks,
Miquèl

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

Re: Kernel 5.10-rc1 not mounting NAND flash (Bisected to d7157ff49a5b ("mtd: rawnand: Use the ECC framework user input parsing bits"))

[Christophe Leroy]

Hi Miquel,

Le 04/11/2020 à 18:38, Miquel Raynal a écrit :
> Hi Christophe,
> 
> Christophe Leroy <christophe.leroy@csgroup.eu> wrote on Wed, 04 Nov
> 2020 18:33:53 +0100:
> 
>> Hi Miquel,
>>
>> I'm unable to boot 5.10-rc1 on my boards. I get the following error:
>>
>> [    4.125811] nand: device found, Manufacturer ID: 0xad, Chip ID: 0x76
>> [    4.131992] nand: Hynix NAND 64MiB 3,3V 8-bit
>> [    4.136173] nand: 64 MiB, SLC, erase size: 16 KiB, page size: 512, OOB size: 16
>> [    4.143534] ------------[ cut here ]------------
>> [    4.147934] Unsupported ECC algorithm!
>> [    4.152142] WARNING: CPU: 0 PID: 1 at drivers/mtd/nand/raw/nand_base.c:5244 nand_scan_with_ids+0x1260/0x1640
>> ...
>> [    4.332052] ---[ end trace e3a36f62cae4ac56 ]---
>> [    4.336882] gpio-nand: probe of c0000000.nand failed with error -22
>>
>> Bisected to commit d7157ff49a5b ("mtd: rawnand: Use the ECC framework user input parsing bits")
>>
>> My first impression is that with that change, the value set in chip->ecc.algo
>> by gpio_nand_probe() in drivers/mtd/nand/raw/gpio.c gets overwritten in rawnand_dt_init()
>>
>> The following change fixes the problem, though I'm not sure it is the right fix. Can you have a look ?
>>
>> diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
>> index 1f0d542d5923..aa74797cf2da 100644
>> --- a/drivers/mtd/nand/raw/nand_base.c
>> +++ b/drivers/mtd/nand/raw/nand_base.c
>> @@ -5032,7 +5032,8 @@ static int rawnand_dt_init(struct nand_chip *chip)
>>    		chip->ecc.engine_type = nand->ecc.defaults.engine_type;
>>
>>    	chip->ecc.placement = nand->ecc.user_conf.placement;
>> -	chip->ecc.algo = nand->ecc.user_conf.algo;
>> +	if (chip->ecc.algo == NAND_ECC_ALGO_UNKNOWN)
>> +		chip->ecc.algo = nand->ecc.user_conf.algo;
>>    	chip->ecc.strength = nand->ecc.user_conf.strength;
>>    	chip->ecc.size = nand->ecc.user_conf.step_size;
>>
>> ---
>>
>> Thanks
>> Christophe
> 
> Sorry for introducing this issue, I didn't had the time to send the
> Fixes PR yet but I think this issue has been solved already. Could
> you please try with a recent linux-next?
> 

Sorry, same problem with "Linux version 5.10.0-rc2-next-20201104"

Christophe

Re: Kernel 5.10-rc1 not mounting NAND flash (Bisected to d7157ff49a5b ("mtd: rawnand: Use the ECC framework user input parsing bits"))

[Christophe Leroy]

Hi Miquel,

Le 04/11/2020 à 18:38, Miquel Raynal a écrit :
> Hi Christophe,
> 
> Christophe Leroy <christophe.leroy@csgroup.eu> wrote on Wed, 04 Nov
> 2020 18:33:53 +0100:
> 
>> Hi Miquel,
>>
>> I'm unable to boot 5.10-rc1 on my boards. I get the following error:
>>
>> [    4.125811] nand: device found, Manufacturer ID: 0xad, Chip ID: 0x76
>> [    4.131992] nand: Hynix NAND 64MiB 3,3V 8-bit
>> [    4.136173] nand: 64 MiB, SLC, erase size: 16 KiB, page size: 512, OOB size: 16
>> [    4.143534] ------------[ cut here ]------------
>> [    4.147934] Unsupported ECC algorithm!
>> [    4.152142] WARNING: CPU: 0 PID: 1 at drivers/mtd/nand/raw/nand_base.c:5244 nand_scan_with_ids+0x1260/0x1640
>> ...
>> [    4.332052] ---[ end trace e3a36f62cae4ac56 ]---
>> [    4.336882] gpio-nand: probe of c0000000.nand failed with error -22
>>
>> Bisected to commit d7157ff49a5b ("mtd: rawnand: Use the ECC framework user input parsing bits")
>>
>> My first impression is that with that change, the value set in chip->ecc.algo
>> by gpio_nand_probe() in drivers/mtd/nand/raw/gpio.c gets overwritten in rawnand_dt_init()
>>
>> The following change fixes the problem, though I'm not sure it is the right fix. Can you have a look ?
>>
>> diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
>> index 1f0d542d5923..aa74797cf2da 100644
>> --- a/drivers/mtd/nand/raw/nand_base.c
>> +++ b/drivers/mtd/nand/raw/nand_base.c
>> @@ -5032,7 +5032,8 @@ static int rawnand_dt_init(struct nand_chip *chip)
>>    		chip->ecc.engine_type = nand->ecc.defaults.engine_type;
>>
>>    	chip->ecc.placement = nand->ecc.user_conf.placement;
>> -	chip->ecc.algo = nand->ecc.user_conf.algo;
>> +	if (chip->ecc.algo == NAND_ECC_ALGO_UNKNOWN)
>> +		chip->ecc.algo = nand->ecc.user_conf.algo;
>>    	chip->ecc.strength = nand->ecc.user_conf.strength;
>>    	chip->ecc.size = nand->ecc.user_conf.step_size;
>>
>> ---
>>
>> Thanks
>> Christophe
> 
> Sorry for introducing this issue, I didn't had the time to send the
> Fixes PR yet but I think this issue has been solved already. Could
> you please try with a recent linux-next?
> 

Sorry, same problem with "Linux version 5.10.0-rc2-next-20201104"

Christophe

Re: Kernel 5.10-rc1 not mounting NAND flash (Bisected to d7157ff49a5b ("mtd: rawnand: Use the ECC framework user input parsing bits"))

[Christophe Leroy]

Hi Miquel,

Le 04/11/2020 à 18:38, Miquel Raynal a écrit :
> Hi Christophe,
> 
> Christophe Leroy <christophe.leroy@csgroup.eu> wrote on Wed, 04 Nov
> 2020 18:33:53 +0100:
> 
>> Hi Miquel,
>>
>> I'm unable to boot 5.10-rc1 on my boards. I get the following error:
>>
>> [    4.125811] nand: device found, Manufacturer ID: 0xad, Chip ID: 0x76
>> [    4.131992] nand: Hynix NAND 64MiB 3,3V 8-bit
>> [    4.136173] nand: 64 MiB, SLC, erase size: 16 KiB, page size: 512, OOB size: 16
>> [    4.143534] ------------[ cut here ]------------
>> [    4.147934] Unsupported ECC algorithm!
>> [    4.152142] WARNING: CPU: 0 PID: 1 at drivers/mtd/nand/raw/nand_base.c:5244 nand_scan_with_ids+0x1260/0x1640
>> ...
>> [    4.332052] ---[ end trace e3a36f62cae4ac56 ]---
>> [    4.336882] gpio-nand: probe of c0000000.nand failed with error -22
>>
>> Bisected to commit d7157ff49a5b ("mtd: rawnand: Use the ECC framework user input parsing bits")
>>
>> My first impression is that with that change, the value set in chip->ecc.algo
>> by gpio_nand_probe() in drivers/mtd/nand/raw/gpio.c gets overwritten in rawnand_dt_init()
>>
>> The following change fixes the problem, though I'm not sure it is the right fix. Can you have a look ?
>>
>> diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
>> index 1f0d542d5923..aa74797cf2da 100644
>> --- a/drivers/mtd/nand/raw/nand_base.c
>> +++ b/drivers/mtd/nand/raw/nand_base.c
>> @@ -5032,7 +5032,8 @@ static int rawnand_dt_init(struct nand_chip *chip)
>>    		chip->ecc.engine_type = nand->ecc.defaults.engine_type;
>>
>>    	chip->ecc.placement = nand->ecc.user_conf.placement;
>> -	chip->ecc.algo = nand->ecc.user_conf.algo;
>> +	if (chip->ecc.algo == NAND_ECC_ALGO_UNKNOWN)
>> +		chip->ecc.algo = nand->ecc.user_conf.algo;
>>    	chip->ecc.strength = nand->ecc.user_conf.strength;
>>    	chip->ecc.size = nand->ecc.user_conf.step_size;
>>
>> ---
>>
>> Thanks
>> Christophe
> 
> Sorry for introducing this issue, I didn't had the time to send the
> Fixes PR yet but I think this issue has been solved already. Could
> you please try with a recent linux-next?
> 

Sorry, same problem with "Linux version 5.10.0-rc2-next-20201104"

Christophe

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Re: Kernel 5.10-rc1 not mounting NAND flash (Bisected to d7157ff49a5b ("mtd: rawnand: Use the ECC framework user input parsing bits"))

[Miquel Raynal]

Hi Christophe,

Christophe Leroy <christophe.leroy@csgroup.eu> wrote on Wed, 4 Nov 2020
19:37:57 +0100:

> Hi Miquel,
> 
> Le 04/11/2020 à 18:38, Miquel Raynal a écrit :
> > Hi Christophe,
> > 
> > Christophe Leroy <christophe.leroy@csgroup.eu> wrote on Wed, 04 Nov
> > 2020 18:33:53 +0100:
> >   
> >> Hi Miquel,
> >>
> >> I'm unable to boot 5.10-rc1 on my boards. I get the following error:
> >>
> >> [    4.125811] nand: device found, Manufacturer ID: 0xad, Chip ID: 0x76
> >> [    4.131992] nand: Hynix NAND 64MiB 3,3V 8-bit
> >> [    4.136173] nand: 64 MiB, SLC, erase size: 16 KiB, page size: 512, OOB size: 16
> >> [    4.143534] ------------[ cut here ]------------
> >> [    4.147934] Unsupported ECC algorithm!
> >> [    4.152142] WARNING: CPU: 0 PID: 1 at drivers/mtd/nand/raw/nand_base.c:5244 nand_scan_with_ids+0x1260/0x1640
> >> ...
> >> [    4.332052] ---[ end trace e3a36f62cae4ac56 ]---
> >> [    4.336882] gpio-nand: probe of c0000000.nand failed with error -22
> >>
> >> Bisected to commit d7157ff49a5b ("mtd: rawnand: Use the ECC framework user input parsing bits")
> >>
> >> My first impression is that with that change, the value set in chip->ecc.algo
> >> by gpio_nand_probe() in drivers/mtd/nand/raw/gpio.c gets overwritten in rawnand_dt_init()
> >>
> >> The following change fixes the problem, though I'm not sure it is the right fix. Can you have a look ?
> >>
> >> diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
> >> index 1f0d542d5923..aa74797cf2da 100644
> >> --- a/drivers/mtd/nand/raw/nand_base.c
> >> +++ b/drivers/mtd/nand/raw/nand_base.c
> >> @@ -5032,7 +5032,8 @@ static int rawnand_dt_init(struct nand_chip *chip)
> >>    		chip->ecc.engine_type = nand->ecc.defaults.engine_type;
> >>
> >>    	chip->ecc.placement = nand->ecc.user_conf.placement;
> >> -	chip->ecc.algo = nand->ecc.user_conf.algo;
> >> +	if (chip->ecc.algo == NAND_ECC_ALGO_UNKNOWN)
> >> +		chip->ecc.algo = nand->ecc.user_conf.algo;
> >>    	chip->ecc.strength = nand->ecc.user_conf.strength;
> >>    	chip->ecc.size = nand->ecc.user_conf.step_size;
> >>
> >> ---
> >>
> >> Thanks
> >> Christophe  
> > 
> > Sorry for introducing this issue, I didn't had the time to send the
> > Fixes PR yet but I think this issue has been solved already. Could
> > you please try with a recent linux-next?
> >   
> 
> Sorry, same problem with "Linux version 5.10.0-rc2-next-20201104"

Can you please give this patch a try, please?

---8<---

Author: Miquel Raynal <miquel.raynal@bootlin.com>
Date:   Thu Nov 5 08:44:48 2020 +0100

    mtd: rawnand: gpio: Move the ECC initialization to ->attach_chip()
    
    While forcing a Hamming software ECC looks clearly wrong, let's just
    fix the situation for now and move these lines to the ->attach_chip()
    hook which gets executed after the user input parsing and NAND chip
    discovery.
    
    Fixes: d7157ff49a5b ("mtd: rawnand: Use the ECC framework user input parsing bits")
    Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

diff --git a/drivers/mtd/nand/raw/gpio.c b/drivers/mtd/nand/raw/gpio.c
index 3bd847ccc3f3..6feab847f5e0 100644
--- a/drivers/mtd/nand/raw/gpio.c
+++ b/drivers/mtd/nand/raw/gpio.c
@@ -161,8 +161,15 @@ static int gpio_nand_exec_op(struct nand_chip *chip,
        return ret;
 }
 
+static int gpio_nand_attach_chip(struct nand_chip *chip)
+{
+       chip->ecc.mode = NAND_ECC_SOFT;
+       chip->ecc.algo = NAND_ECC_HAMMING;
+}
+
 static const struct nand_controller_ops gpio_nand_ops = {
        .exec_op = gpio_nand_exec_op,
+       .attach_chip = gpio_nand_attach_chip,
 };
 
 #ifdef CONFIG_OF
@@ -342,8 +349,6 @@ static int gpio_nand_probe(struct platform_device *pdev)
        gpiomtd->base.ops = &gpio_nand_ops;
 
        nand_set_flash_node(chip, pdev->dev.of_node);
-       chip->ecc.mode          = NAND_ECC_SOFT;
-       chip->ecc.algo          = NAND_ECC_HAMMING;
        chip->options           = gpiomtd->plat.options;
        chip->controller        = &gpiomtd->base;
 

Re: Kernel 5.10-rc1 not mounting NAND flash (Bisected to d7157ff49a5b ("mtd: rawnand: Use the ECC framework user input parsing bits"))

[Miquel Raynal]

Hi Christophe,

Christophe Leroy <christophe.leroy@csgroup.eu> wrote on Wed, 4 Nov 2020
19:37:57 +0100:

> Hi Miquel,
> 
> Le 04/11/2020 à 18:38, Miquel Raynal a écrit :
> > Hi Christophe,
> > 
> > Christophe Leroy <christophe.leroy@csgroup.eu> wrote on Wed, 04 Nov
> > 2020 18:33:53 +0100:
> >   
> >> Hi Miquel,
> >>
> >> I'm unable to boot 5.10-rc1 on my boards. I get the following error:
> >>
> >> [    4.125811] nand: device found, Manufacturer ID: 0xad, Chip ID: 0x76
> >> [    4.131992] nand: Hynix NAND 64MiB 3,3V 8-bit
> >> [    4.136173] nand: 64 MiB, SLC, erase size: 16 KiB, page size: 512, OOB size: 16
> >> [    4.143534] ------------[ cut here ]------------
> >> [    4.147934] Unsupported ECC algorithm!
> >> [    4.152142] WARNING: CPU: 0 PID: 1 at drivers/mtd/nand/raw/nand_base.c:5244 nand_scan_with_ids+0x1260/0x1640
> >> ...
> >> [    4.332052] ---[ end trace e3a36f62cae4ac56 ]---
> >> [    4.336882] gpio-nand: probe of c0000000.nand failed with error -22
> >>
> >> Bisected to commit d7157ff49a5b ("mtd: rawnand: Use the ECC framework user input parsing bits")
> >>
> >> My first impression is that with that change, the value set in chip->ecc.algo
> >> by gpio_nand_probe() in drivers/mtd/nand/raw/gpio.c gets overwritten in rawnand_dt_init()
> >>
> >> The following change fixes the problem, though I'm not sure it is the right fix. Can you have a look ?
> >>
> >> diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
> >> index 1f0d542d5923..aa74797cf2da 100644
> >> --- a/drivers/mtd/nand/raw/nand_base.c
> >> +++ b/drivers/mtd/nand/raw/nand_base.c
> >> @@ -5032,7 +5032,8 @@ static int rawnand_dt_init(struct nand_chip *chip)
> >>    		chip->ecc.engine_type = nand->ecc.defaults.engine_type;
> >>
> >>    	chip->ecc.placement = nand->ecc.user_conf.placement;
> >> -	chip->ecc.algo = nand->ecc.user_conf.algo;
> >> +	if (chip->ecc.algo == NAND_ECC_ALGO_UNKNOWN)
> >> +		chip->ecc.algo = nand->ecc.user_conf.algo;
> >>    	chip->ecc.strength = nand->ecc.user_conf.strength;
> >>    	chip->ecc.size = nand->ecc.user_conf.step_size;
> >>
> >> ---
> >>
> >> Thanks
> >> Christophe  
> > 
> > Sorry for introducing this issue, I didn't had the time to send the
> > Fixes PR yet but I think this issue has been solved already. Could
> > you please try with a recent linux-next?
> >   
> 
> Sorry, same problem with "Linux version 5.10.0-rc2-next-20201104"

Can you please give this patch a try, please?

---8<---

Author: Miquel Raynal <miquel.raynal@bootlin.com>
Date:   Thu Nov 5 08:44:48 2020 +0100

    mtd: rawnand: gpio: Move the ECC initialization to ->attach_chip()
    
    While forcing a Hamming software ECC looks clearly wrong, let's just
    fix the situation for now and move these lines to the ->attach_chip()
    hook which gets executed after the user input parsing and NAND chip
    discovery.
    
    Fixes: d7157ff49a5b ("mtd: rawnand: Use the ECC framework user input parsing bits")
    Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

diff --git a/drivers/mtd/nand/raw/gpio.c b/drivers/mtd/nand/raw/gpio.c
index 3bd847ccc3f3..6feab847f5e0 100644
--- a/drivers/mtd/nand/raw/gpio.c
+++ b/drivers/mtd/nand/raw/gpio.c
@@ -161,8 +161,15 @@ static int gpio_nand_exec_op(struct nand_chip *chip,
        return ret;
 }
 
+static int gpio_nand_attach_chip(struct nand_chip *chip)
+{
+       chip->ecc.mode = NAND_ECC_SOFT;
+       chip->ecc.algo = NAND_ECC_HAMMING;
+}
+
 static const struct nand_controller_ops gpio_nand_ops = {
        .exec_op = gpio_nand_exec_op,
+       .attach_chip = gpio_nand_attach_chip,
 };
 
 #ifdef CONFIG_OF
@@ -342,8 +349,6 @@ static int gpio_nand_probe(struct platform_device *pdev)
        gpiomtd->base.ops = &gpio_nand_ops;
 
        nand_set_flash_node(chip, pdev->dev.of_node);
-       chip->ecc.mode          = NAND_ECC_SOFT;
-       chip->ecc.algo          = NAND_ECC_HAMMING;
        chip->options           = gpiomtd->plat.options;
        chip->controller        = &gpiomtd->base;
 

Re: Kernel 5.10-rc1 not mounting NAND flash (Bisected to d7157ff49a5b ("mtd: rawnand: Use the ECC framework user input parsing bits"))

[Miquel Raynal]

Hi Christophe,

Christophe Leroy <christophe.leroy@csgroup.eu> wrote on Wed, 4 Nov 2020
19:37:57 +0100:

> Hi Miquel,
> 
> Le 04/11/2020 à 18:38, Miquel Raynal a écrit :
> > Hi Christophe,
> > 
> > Christophe Leroy <christophe.leroy@csgroup.eu> wrote on Wed, 04 Nov
> > 2020 18:33:53 +0100:
> >   
> >> Hi Miquel,
> >>
> >> I'm unable to boot 5.10-rc1 on my boards. I get the following error:
> >>
> >> [    4.125811] nand: device found, Manufacturer ID: 0xad, Chip ID: 0x76
> >> [    4.131992] nand: Hynix NAND 64MiB 3,3V 8-bit
> >> [    4.136173] nand: 64 MiB, SLC, erase size: 16 KiB, page size: 512, OOB size: 16
> >> [    4.143534] ------------[ cut here ]------------
> >> [    4.147934] Unsupported ECC algorithm!
> >> [    4.152142] WARNING: CPU: 0 PID: 1 at drivers/mtd/nand/raw/nand_base.c:5244 nand_scan_with_ids+0x1260/0x1640
> >> ...
> >> [    4.332052] ---[ end trace e3a36f62cae4ac56 ]---
> >> [    4.336882] gpio-nand: probe of c0000000.nand failed with error -22
> >>
> >> Bisected to commit d7157ff49a5b ("mtd: rawnand: Use the ECC framework user input parsing bits")
> >>
> >> My first impression is that with that change, the value set in chip->ecc.algo
> >> by gpio_nand_probe() in drivers/mtd/nand/raw/gpio.c gets overwritten in rawnand_dt_init()
> >>
> >> The following change fixes the problem, though I'm not sure it is the right fix. Can you have a look ?
> >>
> >> diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
> >> index 1f0d542d5923..aa74797cf2da 100644
> >> --- a/drivers/mtd/nand/raw/nand_base.c
> >> +++ b/drivers/mtd/nand/raw/nand_base.c
> >> @@ -5032,7 +5032,8 @@ static int rawnand_dt_init(struct nand_chip *chip)
> >>    		chip->ecc.engine_type = nand->ecc.defaults.engine_type;
> >>
> >>    	chip->ecc.placement = nand->ecc.user_conf.placement;
> >> -	chip->ecc.algo = nand->ecc.user_conf.algo;
> >> +	if (chip->ecc.algo == NAND_ECC_ALGO_UNKNOWN)
> >> +		chip->ecc.algo = nand->ecc.user_conf.algo;
> >>    	chip->ecc.strength = nand->ecc.user_conf.strength;
> >>    	chip->ecc.size = nand->ecc.user_conf.step_size;
> >>
> >> ---
> >>
> >> Thanks
> >> Christophe  
> > 
> > Sorry for introducing this issue, I didn't had the time to send the
> > Fixes PR yet but I think this issue has been solved already. Could
> > you please try with a recent linux-next?
> >   
> 
> Sorry, same problem with "Linux version 5.10.0-rc2-next-20201104"

Can you please give this patch a try, please?

---8<---

Author: Miquel Raynal <miquel.raynal@bootlin.com>
Date:   Thu Nov 5 08:44:48 2020 +0100

    mtd: rawnand: gpio: Move the ECC initialization to ->attach_chip()
    
    While forcing a Hamming software ECC looks clearly wrong, let's just
    fix the situation for now and move these lines to the ->attach_chip()
    hook which gets executed after the user input parsing and NAND chip
    discovery.
    
    Fixes: d7157ff49a5b ("mtd: rawnand: Use the ECC framework user input parsing bits")
    Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

diff --git a/drivers/mtd/nand/raw/gpio.c b/drivers/mtd/nand/raw/gpio.c
index 3bd847ccc3f3..6feab847f5e0 100644
--- a/drivers/mtd/nand/raw/gpio.c
+++ b/drivers/mtd/nand/raw/gpio.c
@@ -161,8 +161,15 @@ static int gpio_nand_exec_op(struct nand_chip *chip,
        return ret;
 }
 
+static int gpio_nand_attach_chip(struct nand_chip *chip)
+{
+       chip->ecc.mode = NAND_ECC_SOFT;
+       chip->ecc.algo = NAND_ECC_HAMMING;
+}
+
 static const struct nand_controller_ops gpio_nand_ops = {
        .exec_op = gpio_nand_exec_op,
+       .attach_chip = gpio_nand_attach_chip,
 };
 
 #ifdef CONFIG_OF
@@ -342,8 +349,6 @@ static int gpio_nand_probe(struct platform_device *pdev)
        gpiomtd->base.ops = &gpio_nand_ops;
 
        nand_set_flash_node(chip, pdev->dev.of_node);
-       chip->ecc.mode          = NAND_ECC_SOFT;
-       chip->ecc.algo          = NAND_ECC_HAMMING;
        chip->options           = gpiomtd->plat.options;
        chip->controller        = &gpiomtd->base;
 

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Re: Kernel 5.10-rc1 not mounting NAND flash (Bisected to d7157ff49a5b ("mtd: rawnand: Use the ECC framework user input parsing bits"))

[Christophe Leroy]

Quoting Miquel Raynal <miquel.raynal@bootlin.com>:

> Hi Christophe,
>
> Christophe Leroy <christophe.leroy@csgroup.eu> wrote on Wed, 4 Nov 2020
> 19:37:57 +0100:
>
>> Hi Miquel,
>>
>> Le 04/11/2020 à 18:38, Miquel Raynal a écrit :
>> > Hi Christophe,
>> >
>> > Christophe Leroy <christophe.leroy@csgroup.eu> wrote on Wed, 04 Nov
>> > 2020 18:33:53 +0100:
>> >
>> >> Hi Miquel,
>> >>
>> >> I'm unable to boot 5.10-rc1 on my boards. I get the following error:
>> >>
>> >> [    4.125811] nand: device found, Manufacturer ID: 0xad, Chip ID: 0x76
>> >> [    4.131992] nand: Hynix NAND 64MiB 3,3V 8-bit
>> >> [    4.136173] nand: 64 MiB, SLC, erase size: 16 KiB, page size:  
>> 512, OOB size: 16
>> >> [    4.143534] ------------[ cut here ]------------
>> >> [    4.147934] Unsupported ECC algorithm!
>> >> [    4.152142] WARNING: CPU: 0 PID: 1 at  
>> drivers/mtd/nand/raw/nand_base.c:5244  
>> nand_scan_with_ids+0x1260/0x1640
>> >> ...
>> >> [    4.332052] ---[ end trace e3a36f62cae4ac56 ]---
>> >> [    4.336882] gpio-nand: probe of c0000000.nand failed with error -22
>> >>
>> >> Bisected to commit d7157ff49a5b ("mtd: rawnand: Use the ECC  
>> framework user input parsing bits")
>> >>
>> >> My first impression is that with that change, the value set in  
>> chip->ecc.algo
>> >> by gpio_nand_probe() in drivers/mtd/nand/raw/gpio.c gets  
>> overwritten in rawnand_dt_init()
>> >>
>> >> The following change fixes the problem, though I'm not sure it  
>> is the right fix. Can you have a look ?
>> >>
>> >> diff --git a/drivers/mtd/nand/raw/nand_base.c  
>> b/drivers/mtd/nand/raw/nand_base.c
>> >> index 1f0d542d5923..aa74797cf2da 100644
>> >> --- a/drivers/mtd/nand/raw/nand_base.c
>> >> +++ b/drivers/mtd/nand/raw/nand_base.c
>> >> @@ -5032,7 +5032,8 @@ static int rawnand_dt_init(struct nand_chip *chip)
>> >>    		chip->ecc.engine_type = nand->ecc.defaults.engine_type;
>> >>
>> >>    	chip->ecc.placement = nand->ecc.user_conf.placement;
>> >> -	chip->ecc.algo = nand->ecc.user_conf.algo;
>> >> +	if (chip->ecc.algo == NAND_ECC_ALGO_UNKNOWN)
>> >> +		chip->ecc.algo = nand->ecc.user_conf.algo;
>> >>    	chip->ecc.strength = nand->ecc.user_conf.strength;
>> >>    	chip->ecc.size = nand->ecc.user_conf.step_size;
>> >>
>> >> ---
>> >>
>> >> Thanks
>> >> Christophe
>> >
>> > Sorry for introducing this issue, I didn't had the time to send the
>> > Fixes PR yet but I think this issue has been solved already. Could
>> > you please try with a recent linux-next?
>> >
>>
>> Sorry, same problem with "Linux version 5.10.0-rc2-next-20201104"
>
> Can you please give this patch a try, please?
>
> ---8<---
>
> Author: Miquel Raynal <miquel.raynal@bootlin.com>
> Date:   Thu Nov 5 08:44:48 2020 +0100
>
>     mtd: rawnand: gpio: Move the ECC initialization to ->attach_chip()
>
>     While forcing a Hamming software ECC looks clearly wrong, let's just
>     fix the situation for now and move these lines to the ->attach_chip()
>     hook which gets executed after the user input parsing and NAND chip
>     discovery.
>
>     Fixes: d7157ff49a5b ("mtd: rawnand: Use the ECC framework user  
> input parsing bits")
>     Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
>
> diff --git a/drivers/mtd/nand/raw/gpio.c b/drivers/mtd/nand/raw/gpio.c
> index 3bd847ccc3f3..6feab847f5e0 100644
> --- a/drivers/mtd/nand/raw/gpio.c
> +++ b/drivers/mtd/nand/raw/gpio.c
> @@ -161,8 +161,15 @@ static int gpio_nand_exec_op(struct nand_chip *chip,
>         return ret;
>  }
>
> +static int gpio_nand_attach_chip(struct nand_chip *chip)
> +{
> +       chip->ecc.mode = NAND_ECC_SOFT;
> +       chip->ecc.algo = NAND_ECC_HAMMING;
> +}
> +
>  static const struct nand_controller_ops gpio_nand_ops = {
>         .exec_op = gpio_nand_exec_op,
> +       .attach_chip = gpio_nand_attach_chip,
>  };
>
>  #ifdef CONFIG_OF
> @@ -342,8 +349,6 @@ static int gpio_nand_probe(struct platform_device *pdev)
>         gpiomtd->base.ops = &gpio_nand_ops;
>
>         nand_set_flash_node(chip, pdev->dev.of_node);
> -       chip->ecc.mode          = NAND_ECC_SOFT;
> -       chip->ecc.algo          = NAND_ECC_HAMMING;
>         chip->options           = gpiomtd->plat.options;
>         chip->controller        = &gpiomtd->base;


Works with the following:

diff --git a/drivers/mtd/nand/raw/gpio.c b/drivers/mtd/nand/raw/gpio.c
index 4ec0a1e10867..66d3f1eb788c 100644
--- a/drivers/mtd/nand/raw/gpio.c
+++ b/drivers/mtd/nand/raw/gpio.c
@@ -161,8 +161,17 @@ static int gpio_nand_exec_op(struct nand_chip *chip,
  	return ret;
  }

+static int gpio_nand_attach_chip(struct nand_chip *chip)
+{
+	chip->ecc.engine_type	= NAND_ECC_ENGINE_TYPE_SOFT;
+	chip->ecc.algo		= NAND_ECC_ALGO_HAMMING;
+
+	return 0;
+}
+
  static const struct nand_controller_ops gpio_nand_ops = {
  	.exec_op = gpio_nand_exec_op,
+	.attach_chip = gpio_nand_attach_chip,
  };

  #ifdef CONFIG_OF
@@ -342,8 +351,6 @@ static int gpio_nand_probe(struct platform_device *pdev)
  	gpiomtd->base.ops = &gpio_nand_ops;

  	nand_set_flash_node(chip, pdev->dev.of_node);
-	chip->ecc.engine_type	= NAND_ECC_ENGINE_TYPE_SOFT;
-	chip->ecc.algo		= NAND_ECC_ALGO_HAMMING;
  	chip->options		= gpiomtd->plat.options;
  	chip->controller	= &gpiomtd->base;

---
Christophe

Re: Kernel 5.10-rc1 not mounting NAND flash (Bisected to d7157ff49a5b ("mtd: rawnand: Use the ECC framework user input parsing bits"))

[Christophe Leroy]

Quoting Miquel Raynal <miquel.raynal@bootlin.com>:

> Hi Christophe,
>
> Christophe Leroy <christophe.leroy@csgroup.eu> wrote on Wed, 4 Nov 2020
> 19:37:57 +0100:
>
>> Hi Miquel,
>>
>> Le 04/11/2020 à 18:38, Miquel Raynal a écrit :
>> > Hi Christophe,
>> >
>> > Christophe Leroy <christophe.leroy@csgroup.eu> wrote on Wed, 04 Nov
>> > 2020 18:33:53 +0100:
>> >
>> >> Hi Miquel,
>> >>
>> >> I'm unable to boot 5.10-rc1 on my boards. I get the following error:
>> >>
>> >> [    4.125811] nand: device found, Manufacturer ID: 0xad, Chip ID: 0x76
>> >> [    4.131992] nand: Hynix NAND 64MiB 3,3V 8-bit
>> >> [    4.136173] nand: 64 MiB, SLC, erase size: 16 KiB, page size:  
>> 512, OOB size: 16
>> >> [    4.143534] ------------[ cut here ]------------
>> >> [    4.147934] Unsupported ECC algorithm!
>> >> [    4.152142] WARNING: CPU: 0 PID: 1 at  
>> drivers/mtd/nand/raw/nand_base.c:5244  
>> nand_scan_with_ids+0x1260/0x1640
>> >> ...
>> >> [    4.332052] ---[ end trace e3a36f62cae4ac56 ]---
>> >> [    4.336882] gpio-nand: probe of c0000000.nand failed with error -22
>> >>
>> >> Bisected to commit d7157ff49a5b ("mtd: rawnand: Use the ECC  
>> framework user input parsing bits")
>> >>
>> >> My first impression is that with that change, the value set in  
>> chip->ecc.algo
>> >> by gpio_nand_probe() in drivers/mtd/nand/raw/gpio.c gets  
>> overwritten in rawnand_dt_init()
>> >>
>> >> The following change fixes the problem, though I'm not sure it  
>> is the right fix. Can you have a look ?
>> >>
>> >> diff --git a/drivers/mtd/nand/raw/nand_base.c  
>> b/drivers/mtd/nand/raw/nand_base.c
>> >> index 1f0d542d5923..aa74797cf2da 100644
>> >> --- a/drivers/mtd/nand/raw/nand_base.c
>> >> +++ b/drivers/mtd/nand/raw/nand_base.c
>> >> @@ -5032,7 +5032,8 @@ static int rawnand_dt_init(struct nand_chip *chip)
>> >>    		chip->ecc.engine_type = nand->ecc.defaults.engine_type;
>> >>
>> >>    	chip->ecc.placement = nand->ecc.user_conf.placement;
>> >> -	chip->ecc.algo = nand->ecc.user_conf.algo;
>> >> +	if (chip->ecc.algo == NAND_ECC_ALGO_UNKNOWN)
>> >> +		chip->ecc.algo = nand->ecc.user_conf.algo;
>> >>    	chip->ecc.strength = nand->ecc.user_conf.strength;
>> >>    	chip->ecc.size = nand->ecc.user_conf.step_size;
>> >>
>> >> ---
>> >>
>> >> Thanks
>> >> Christophe
>> >
>> > Sorry for introducing this issue, I didn't had the time to send the
>> > Fixes PR yet but I think this issue has been solved already. Could
>> > you please try with a recent linux-next?
>> >
>>
>> Sorry, same problem with "Linux version 5.10.0-rc2-next-20201104"
>
> Can you please give this patch a try, please?
>
> ---8<---
>
> Author: Miquel Raynal <miquel.raynal@bootlin.com>
> Date:   Thu Nov 5 08:44:48 2020 +0100
>
>     mtd: rawnand: gpio: Move the ECC initialization to ->attach_chip()
>
>     While forcing a Hamming software ECC looks clearly wrong, let's just
>     fix the situation for now and move these lines to the ->attach_chip()
>     hook which gets executed after the user input parsing and NAND chip
>     discovery.
>
>     Fixes: d7157ff49a5b ("mtd: rawnand: Use the ECC framework user  
> input parsing bits")
>     Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
>
> diff --git a/drivers/mtd/nand/raw/gpio.c b/drivers/mtd/nand/raw/gpio.c
> index 3bd847ccc3f3..6feab847f5e0 100644
> --- a/drivers/mtd/nand/raw/gpio.c
> +++ b/drivers/mtd/nand/raw/gpio.c
> @@ -161,8 +161,15 @@ static int gpio_nand_exec_op(struct nand_chip *chip,
>         return ret;
>  }
>
> +static int gpio_nand_attach_chip(struct nand_chip *chip)
> +{
> +       chip->ecc.mode = NAND_ECC_SOFT;
> +       chip->ecc.algo = NAND_ECC_HAMMING;
> +}
> +
>  static const struct nand_controller_ops gpio_nand_ops = {
>         .exec_op = gpio_nand_exec_op,
> +       .attach_chip = gpio_nand_attach_chip,
>  };
>
>  #ifdef CONFIG_OF
> @@ -342,8 +349,6 @@ static int gpio_nand_probe(struct platform_device *pdev)
>         gpiomtd->base.ops = &gpio_nand_ops;
>
>         nand_set_flash_node(chip, pdev->dev.of_node);
> -       chip->ecc.mode          = NAND_ECC_SOFT;
> -       chip->ecc.algo          = NAND_ECC_HAMMING;
>         chip->options           = gpiomtd->plat.options;
>         chip->controller        = &gpiomtd->base;


Works with the following:

diff --git a/drivers/mtd/nand/raw/gpio.c b/drivers/mtd/nand/raw/gpio.c
index 4ec0a1e10867..66d3f1eb788c 100644
--- a/drivers/mtd/nand/raw/gpio.c
+++ b/drivers/mtd/nand/raw/gpio.c
@@ -161,8 +161,17 @@ static int gpio_nand_exec_op(struct nand_chip *chip,
  	return ret;
  }

+static int gpio_nand_attach_chip(struct nand_chip *chip)
+{
+	chip->ecc.engine_type	= NAND_ECC_ENGINE_TYPE_SOFT;
+	chip->ecc.algo		= NAND_ECC_ALGO_HAMMING;
+
+	return 0;
+}
+
  static const struct nand_controller_ops gpio_nand_ops = {
  	.exec_op = gpio_nand_exec_op,
+	.attach_chip = gpio_nand_attach_chip,
  };

  #ifdef CONFIG_OF
@@ -342,8 +351,6 @@ static int gpio_nand_probe(struct platform_device *pdev)
  	gpiomtd->base.ops = &gpio_nand_ops;

  	nand_set_flash_node(chip, pdev->dev.of_node);
-	chip->ecc.engine_type	= NAND_ECC_ENGINE_TYPE_SOFT;
-	chip->ecc.algo		= NAND_ECC_ALGO_HAMMING;
  	chip->options		= gpiomtd->plat.options;
  	chip->controller	= &gpiomtd->base;

---
Christophe

Re: Kernel 5.10-rc1 not mounting NAND flash (Bisected to d7157ff49a5b ("mtd: rawnand: Use the ECC framework user input parsing bits"))

[Christophe Leroy]

Quoting Miquel Raynal <miquel.raynal@bootlin.com>:

> Hi Christophe,
>
> Christophe Leroy <christophe.leroy@csgroup.eu> wrote on Wed, 4 Nov 2020
> 19:37:57 +0100:
>
>> Hi Miquel,
>>
>> Le 04/11/2020 à 18:38, Miquel Raynal a écrit :
>> > Hi Christophe,
>> >
>> > Christophe Leroy <christophe.leroy@csgroup.eu> wrote on Wed, 04 Nov
>> > 2020 18:33:53 +0100:
>> >
>> >> Hi Miquel,
>> >>
>> >> I'm unable to boot 5.10-rc1 on my boards. I get the following error:
>> >>
>> >> [    4.125811] nand: device found, Manufacturer ID: 0xad, Chip ID: 0x76
>> >> [    4.131992] nand: Hynix NAND 64MiB 3,3V 8-bit
>> >> [    4.136173] nand: 64 MiB, SLC, erase size: 16 KiB, page size:  
>> 512, OOB size: 16
>> >> [    4.143534] ------------[ cut here ]------------
>> >> [    4.147934] Unsupported ECC algorithm!
>> >> [    4.152142] WARNING: CPU: 0 PID: 1 at  
>> drivers/mtd/nand/raw/nand_base.c:5244  
>> nand_scan_with_ids+0x1260/0x1640
>> >> ...
>> >> [    4.332052] ---[ end trace e3a36f62cae4ac56 ]---
>> >> [    4.336882] gpio-nand: probe of c0000000.nand failed with error -22
>> >>
>> >> Bisected to commit d7157ff49a5b ("mtd: rawnand: Use the ECC  
>> framework user input parsing bits")
>> >>
>> >> My first impression is that with that change, the value set in  
>> chip->ecc.algo
>> >> by gpio_nand_probe() in drivers/mtd/nand/raw/gpio.c gets  
>> overwritten in rawnand_dt_init()
>> >>
>> >> The following change fixes the problem, though I'm not sure it  
>> is the right fix. Can you have a look ?
>> >>
>> >> diff --git a/drivers/mtd/nand/raw/nand_base.c  
>> b/drivers/mtd/nand/raw/nand_base.c
>> >> index 1f0d542d5923..aa74797cf2da 100644
>> >> --- a/drivers/mtd/nand/raw/nand_base.c
>> >> +++ b/drivers/mtd/nand/raw/nand_base.c
>> >> @@ -5032,7 +5032,8 @@ static int rawnand_dt_init(struct nand_chip *chip)
>> >>    		chip->ecc.engine_type = nand->ecc.defaults.engine_type;
>> >>
>> >>    	chip->ecc.placement = nand->ecc.user_conf.placement;
>> >> -	chip->ecc.algo = nand->ecc.user_conf.algo;
>> >> +	if (chip->ecc.algo == NAND_ECC_ALGO_UNKNOWN)
>> >> +		chip->ecc.algo = nand->ecc.user_conf.algo;
>> >>    	chip->ecc.strength = nand->ecc.user_conf.strength;
>> >>    	chip->ecc.size = nand->ecc.user_conf.step_size;
>> >>
>> >> ---
>> >>
>> >> Thanks
>> >> Christophe
>> >
>> > Sorry for introducing this issue, I didn't had the time to send the
>> > Fixes PR yet but I think this issue has been solved already. Could
>> > you please try with a recent linux-next?
>> >
>>
>> Sorry, same problem with "Linux version 5.10.0-rc2-next-20201104"
>
> Can you please give this patch a try, please?
>
> ---8<---
>
> Author: Miquel Raynal <miquel.raynal@bootlin.com>
> Date:   Thu Nov 5 08:44:48 2020 +0100
>
>     mtd: rawnand: gpio: Move the ECC initialization to ->attach_chip()
>
>     While forcing a Hamming software ECC looks clearly wrong, let's just
>     fix the situation for now and move these lines to the ->attach_chip()
>     hook which gets executed after the user input parsing and NAND chip
>     discovery.
>
>     Fixes: d7157ff49a5b ("mtd: rawnand: Use the ECC framework user  
> input parsing bits")
>     Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
>
> diff --git a/drivers/mtd/nand/raw/gpio.c b/drivers/mtd/nand/raw/gpio.c
> index 3bd847ccc3f3..6feab847f5e0 100644
> --- a/drivers/mtd/nand/raw/gpio.c
> +++ b/drivers/mtd/nand/raw/gpio.c
> @@ -161,8 +161,15 @@ static int gpio_nand_exec_op(struct nand_chip *chip,
>         return ret;
>  }
>
> +static int gpio_nand_attach_chip(struct nand_chip *chip)
> +{
> +       chip->ecc.mode = NAND_ECC_SOFT;
> +       chip->ecc.algo = NAND_ECC_HAMMING;
> +}
> +
>  static const struct nand_controller_ops gpio_nand_ops = {
>         .exec_op = gpio_nand_exec_op,
> +       .attach_chip = gpio_nand_attach_chip,
>  };
>
>  #ifdef CONFIG_OF
> @@ -342,8 +349,6 @@ static int gpio_nand_probe(struct platform_device *pdev)
>         gpiomtd->base.ops = &gpio_nand_ops;
>
>         nand_set_flash_node(chip, pdev->dev.of_node);
> -       chip->ecc.mode          = NAND_ECC_SOFT;
> -       chip->ecc.algo          = NAND_ECC_HAMMING;
>         chip->options           = gpiomtd->plat.options;
>         chip->controller        = &gpiomtd->base;


Works with the following:

diff --git a/drivers/mtd/nand/raw/gpio.c b/drivers/mtd/nand/raw/gpio.c
index 4ec0a1e10867..66d3f1eb788c 100644
--- a/drivers/mtd/nand/raw/gpio.c
+++ b/drivers/mtd/nand/raw/gpio.c
@@ -161,8 +161,17 @@ static int gpio_nand_exec_op(struct nand_chip *chip,
  	return ret;
  }

+static int gpio_nand_attach_chip(struct nand_chip *chip)
+{
+	chip->ecc.engine_type	= NAND_ECC_ENGINE_TYPE_SOFT;
+	chip->ecc.algo		= NAND_ECC_ALGO_HAMMING;
+
+	return 0;
+}
+
  static const struct nand_controller_ops gpio_nand_ops = {
  	.exec_op = gpio_nand_exec_op,
+	.attach_chip = gpio_nand_attach_chip,
  };

  #ifdef CONFIG_OF
@@ -342,8 +351,6 @@ static int gpio_nand_probe(struct platform_device *pdev)
  	gpiomtd->base.ops = &gpio_nand_ops;

  	nand_set_flash_node(chip, pdev->dev.of_node);
-	chip->ecc.engine_type	= NAND_ECC_ENGINE_TYPE_SOFT;
-	chip->ecc.algo		= NAND_ECC_ALGO_HAMMING;
  	chip->options		= gpiomtd->plat.options;
  	chip->controller	= &gpiomtd->base;

---
Christophe

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

Re: Kernel 5.10-rc1 not mounting NAND flash (Bisected to d7157ff49a5b ("mtd: rawnand: Use the ECC framework user input parsing bits"))

[Miquel Raynal]

Hi Christophe,

Christophe Leroy <christophe.leroy@csgroup.eu> wrote on Thu, 05 Nov
2020 10:06:51 +0100:

> Quoting Miquel Raynal <miquel.raynal@bootlin.com>:
> 
> > Hi Christophe,
> >
> > Christophe Leroy <christophe.leroy@csgroup.eu> wrote on Wed, 4 Nov 2020
> > 19:37:57 +0100:
> >  
> >> Hi Miquel,
> >>
> >> Le 04/11/2020 à 18:38, Miquel Raynal a écrit :  
> >> > Hi Christophe,
> >> >
> >> > Christophe Leroy <christophe.leroy@csgroup.eu> wrote on Wed, 04 Nov
> >> > 2020 18:33:53 +0100:
> >> >  
> >> >> Hi Miquel,
> >> >>
> >> >> I'm unable to boot 5.10-rc1 on my boards. I get the following error:
> >> >>
> >> >> [    4.125811] nand: device found, Manufacturer ID: 0xad, Chip ID: 0x  
> 76
> >> >> [    4.131992] nand: Hynix NAND 64MiB 3,3V 8-bit
> >> >> [    4.136173] nand: 64 MiB, SLC, erase size: 16 KiB, page size:>> 512, OOB size: 16
> >> >> [    4.143534] ------------[ cut here ]------------
> >> >> [    4.147934] Unsupported ECC algorithm!
> >> >> [    4.152142] WARNING: CPU: 0 PID: 1 at >> drivers/mtd/nand/raw/nand_base.c:5244 >> nand_scan_with_ids+0x1260/0x1640
> >> >> ...
> >> >> [    4.332052] ---[ end trace e3a36f62cae4ac56 ]---
> >> >> [    4.336882] gpio-nand: probe of c0000000.nand failed with error -2  
> 2
> >> >>
> >> >> Bisected to commit d7157ff49a5b ("mtd: rawnand: Use the ECC >> framework user input parsing bits")
> >> >>
> >> >> My first impression is that with that change, the value set in >> chip->ecc.algo
> >> >> by gpio_nand_probe() in drivers/mtd/nand/raw/gpio.c gets >> overwritten in rawnand_dt_init()
> >> >>
> >> >> The following change fixes the problem, though I'm not sure it >> is the right fix. Can you have a look ?
> >> >>
> >> >> diff --git a/drivers/mtd/nand/raw/nand_base.c >> b/drivers/mtd/nand/raw/nand_base.c
> >> >> index 1f0d542d5923..aa74797cf2da 100644
> >> >> --- a/drivers/mtd/nand/raw/nand_base.c
> >> >> +++ b/drivers/mtd/nand/raw/nand_base.c
> >> >> @@ -5032,7 +5032,8 @@ static int rawnand_dt_init(struct nand_chip *ch  
> ip)
> >> >>    		chip->ecc.engine_type = nand->ecc.defaults.engine_type;
> >> >>
> >> >>    	chip->ecc.placement = nand->ecc.user_conf.placement;
> >> >> -	chip->ecc.algo = nand->ecc.user_conf.algo;
> >> >> +	if (chip->ecc.algo == NAND_ECC_ALGO_UNKNOWN)
> >> >> +		chip->ecc.algo = nand->ecc.user_conf.algo;
> >> >>    	chip->ecc.strength = nand->ecc.user_conf.strength;
> >> >>    	chip->ecc.size = nand->ecc.user_conf.step_size;
> >> >>
> >> >> ---
> >> >>
> >> >> Thanks
> >> >> Christophe  
> >> >
> >> > Sorry for introducing this issue, I didn't had the time to send the
> >> > Fixes PR yet but I think this issue has been solved already. Could
> >> > you please try with a recent linux-next?
> >> >  
> >>
> >> Sorry, same problem with "Linux version 5.10.0-rc2-next-20201104"  
> >
> > Can you please give this patch a try, please?
> >
> > ---8<---
> >
> > Author: Miquel Raynal <miquel.raynal@bootlin.com>
> > Date:   Thu Nov 5 08:44:48 2020 +0100
> >
> >     mtd: rawnand: gpio: Move the ECC initialization to ->attach_chip()
> >
> >     While forcing a Hamming software ECC looks clearly wrong, let's just
> >     fix the situation for now and move these lines to the ->attach_chip()
> >     hook which gets executed after the user input parsing and NAND chip
> >     discovery.
> >
> >     Fixes: d7157ff49a5b ("mtd: rawnand: Use the ECC framework user > input parsing bits")
> >     Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
> >
> > diff --git a/drivers/mtd/nand/raw/gpio.c b/drivers/mtd/nand/raw/gpio.c
> > index 3bd847ccc3f3..6feab847f5e0 100644
> > --- a/drivers/mtd/nand/raw/gpio.c
> > +++ b/drivers/mtd/nand/raw/gpio.c
> > @@ -161,8 +161,15 @@ static int gpio_nand_exec_op(struct nand_chip *chip,
> >         return ret;
> >  }
> >
> > +static int gpio_nand_attach_chip(struct nand_chip *chip)
> > +{
> > +       chip->ecc.mode = NAND_ECC_SOFT;
> > +       chip->ecc.algo = NAND_ECC_HAMMING;
> > +}
> > +
> >  static const struct nand_controller_ops gpio_nand_ops = {
> >         .exec_op = gpio_nand_exec_op,
> > +       .attach_chip = gpio_nand_attach_chip,
> >  };
> >
> >  #ifdef CONFIG_OF
> > @@ -342,8 +349,6 @@ static int gpio_nand_probe(struct platform_device *pd  
> ev)
> >         gpiomtd->base.ops = &gpio_nand_ops;
> >
> >         nand_set_flash_node(chip, pdev->dev.of_node);
> > -       chip->ecc.mode          = NAND_ECC_SOFT;
> > -       chip->ecc.algo          = NAND_ECC_HAMMING;
> >         chip->options           = gpiomtd->plat.options;
> >         chip->controller        = &gpiomtd->base;  
> 
> 
> Works with the following:
> 
> diff --git a/drivers/mtd/nand/raw/gpio.c b/drivers/mtd/nand/raw/gpio.c
> index 4ec0a1e10867..66d3f1eb788c 100644
> --- a/drivers/mtd/nand/raw/gpio.c
> +++ b/drivers/mtd/nand/raw/gpio.c
> @@ -161,8 +161,17 @@ static int gpio_nand_exec_op(struct nand_chip *chip,
>   	return ret;
>   }
> 
> +static int gpio_nand_attach_chip(struct nand_chip *chip)
> +{
> +	chip->ecc.engine_type	= NAND_ECC_ENGINE_TYPE_SOFT;
> +	chip->ecc.algo		= NAND_ECC_ALGO_HAMMING;
> +
> +	return 0;
> +}


Yup indeed it was not even compile tested. Good to know, I'll check
the other drivers and send the patch soon.


Thanks,
Miquèl

Re: Kernel 5.10-rc1 not mounting NAND flash (Bisected to d7157ff49a5b ("mtd: rawnand: Use the ECC framework user input parsing bits"))

[Miquel Raynal]

Hi Christophe,

Christophe Leroy <christophe.leroy@csgroup.eu> wrote on Thu, 05 Nov
2020 10:06:51 +0100:

> Quoting Miquel Raynal <miquel.raynal@bootlin.com>:
> 
> > Hi Christophe,
> >
> > Christophe Leroy <christophe.leroy@csgroup.eu> wrote on Wed, 4 Nov 2020
> > 19:37:57 +0100:
> >  
> >> Hi Miquel,
> >>
> >> Le 04/11/2020 à 18:38, Miquel Raynal a écrit :  
> >> > Hi Christophe,
> >> >
> >> > Christophe Leroy <christophe.leroy@csgroup.eu> wrote on Wed, 04 Nov
> >> > 2020 18:33:53 +0100:
> >> >  
> >> >> Hi Miquel,
> >> >>
> >> >> I'm unable to boot 5.10-rc1 on my boards. I get the following error:
> >> >>
> >> >> [    4.125811] nand: device found, Manufacturer ID: 0xad, Chip ID: 0x  
> 76
> >> >> [    4.131992] nand: Hynix NAND 64MiB 3,3V 8-bit
> >> >> [    4.136173] nand: 64 MiB, SLC, erase size: 16 KiB, page size:>> 512, OOB size: 16
> >> >> [    4.143534] ------------[ cut here ]------------
> >> >> [    4.147934] Unsupported ECC algorithm!
> >> >> [    4.152142] WARNING: CPU: 0 PID: 1 at >> drivers/mtd/nand/raw/nand_base.c:5244 >> nand_scan_with_ids+0x1260/0x1640
> >> >> ...
> >> >> [    4.332052] ---[ end trace e3a36f62cae4ac56 ]---
> >> >> [    4.336882] gpio-nand: probe of c0000000.nand failed with error -2  
> 2
> >> >>
> >> >> Bisected to commit d7157ff49a5b ("mtd: rawnand: Use the ECC >> framework user input parsing bits")
> >> >>
> >> >> My first impression is that with that change, the value set in >> chip->ecc.algo
> >> >> by gpio_nand_probe() in drivers/mtd/nand/raw/gpio.c gets >> overwritten in rawnand_dt_init()
> >> >>
> >> >> The following change fixes the problem, though I'm not sure it >> is the right fix. Can you have a look ?
> >> >>
> >> >> diff --git a/drivers/mtd/nand/raw/nand_base.c >> b/drivers/mtd/nand/raw/nand_base.c
> >> >> index 1f0d542d5923..aa74797cf2da 100644
> >> >> --- a/drivers/mtd/nand/raw/nand_base.c
> >> >> +++ b/drivers/mtd/nand/raw/nand_base.c
> >> >> @@ -5032,7 +5032,8 @@ static int rawnand_dt_init(struct nand_chip *ch  
> ip)
> >> >>    		chip->ecc.engine_type = nand->ecc.defaults.engine_type;
> >> >>
> >> >>    	chip->ecc.placement = nand->ecc.user_conf.placement;
> >> >> -	chip->ecc.algo = nand->ecc.user_conf.algo;
> >> >> +	if (chip->ecc.algo == NAND_ECC_ALGO_UNKNOWN)
> >> >> +		chip->ecc.algo = nand->ecc.user_conf.algo;
> >> >>    	chip->ecc.strength = nand->ecc.user_conf.strength;
> >> >>    	chip->ecc.size = nand->ecc.user_conf.step_size;
> >> >>
> >> >> ---
> >> >>
> >> >> Thanks
> >> >> Christophe  
> >> >
> >> > Sorry for introducing this issue, I didn't had the time to send the
> >> > Fixes PR yet but I think this issue has been solved already. Could
> >> > you please try with a recent linux-next?
> >> >  
> >>
> >> Sorry, same problem with "Linux version 5.10.0-rc2-next-20201104"  
> >
> > Can you please give this patch a try, please?
> >
> > ---8<---
> >
> > Author: Miquel Raynal <miquel.raynal@bootlin.com>
> > Date:   Thu Nov 5 08:44:48 2020 +0100
> >
> >     mtd: rawnand: gpio: Move the ECC initialization to ->attach_chip()
> >
> >     While forcing a Hamming software ECC looks clearly wrong, let's just
> >     fix the situation for now and move these lines to the ->attach_chip()
> >     hook which gets executed after the user input parsing and NAND chip
> >     discovery.
> >
> >     Fixes: d7157ff49a5b ("mtd: rawnand: Use the ECC framework user > input parsing bits")
> >     Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
> >
> > diff --git a/drivers/mtd/nand/raw/gpio.c b/drivers/mtd/nand/raw/gpio.c
> > index 3bd847ccc3f3..6feab847f5e0 100644
> > --- a/drivers/mtd/nand/raw/gpio.c
> > +++ b/drivers/mtd/nand/raw/gpio.c
> > @@ -161,8 +161,15 @@ static int gpio_nand_exec_op(struct nand_chip *chip,
> >         return ret;
> >  }
> >
> > +static int gpio_nand_attach_chip(struct nand_chip *chip)
> > +{
> > +       chip->ecc.mode = NAND_ECC_SOFT;
> > +       chip->ecc.algo = NAND_ECC_HAMMING;
> > +}
> > +
> >  static const struct nand_controller_ops gpio_nand_ops = {
> >         .exec_op = gpio_nand_exec_op,
> > +       .attach_chip = gpio_nand_attach_chip,
> >  };
> >
> >  #ifdef CONFIG_OF
> > @@ -342,8 +349,6 @@ static int gpio_nand_probe(struct platform_device *pd  
> ev)
> >         gpiomtd->base.ops = &gpio_nand_ops;
> >
> >         nand_set_flash_node(chip, pdev->dev.of_node);
> > -       chip->ecc.mode          = NAND_ECC_SOFT;
> > -       chip->ecc.algo          = NAND_ECC_HAMMING;
> >         chip->options           = gpiomtd->plat.options;
> >         chip->controller        = &gpiomtd->base;  
> 
> 
> Works with the following:
> 
> diff --git a/drivers/mtd/nand/raw/gpio.c b/drivers/mtd/nand/raw/gpio.c
> index 4ec0a1e10867..66d3f1eb788c 100644
> --- a/drivers/mtd/nand/raw/gpio.c
> +++ b/drivers/mtd/nand/raw/gpio.c
> @@ -161,8 +161,17 @@ static int gpio_nand_exec_op(struct nand_chip *chip,
>   	return ret;
>   }
> 
> +static int gpio_nand_attach_chip(struct nand_chip *chip)
> +{
> +	chip->ecc.engine_type	= NAND_ECC_ENGINE_TYPE_SOFT;
> +	chip->ecc.algo		= NAND_ECC_ALGO_HAMMING;
> +
> +	return 0;
> +}


Yup indeed it was not even compile tested. Good to know, I'll check
the other drivers and send the patch soon.


Thanks,
Miquèl

Re: Kernel 5.10-rc1 not mounting NAND flash (Bisected to d7157ff49a5b ("mtd: rawnand: Use the ECC framework user input parsing bits"))

[Miquel Raynal]

Hi Christophe,

Christophe Leroy <christophe.leroy@csgroup.eu> wrote on Thu, 05 Nov
2020 10:06:51 +0100:

> Quoting Miquel Raynal <miquel.raynal@bootlin.com>:
> 
> > Hi Christophe,
> >
> > Christophe Leroy <christophe.leroy@csgroup.eu> wrote on Wed, 4 Nov 2020
> > 19:37:57 +0100:
> >  
> >> Hi Miquel,
> >>
> >> Le 04/11/2020 à 18:38, Miquel Raynal a écrit :  
> >> > Hi Christophe,
> >> >
> >> > Christophe Leroy <christophe.leroy@csgroup.eu> wrote on Wed, 04 Nov
> >> > 2020 18:33:53 +0100:
> >> >  
> >> >> Hi Miquel,
> >> >>
> >> >> I'm unable to boot 5.10-rc1 on my boards. I get the following error:
> >> >>
> >> >> [    4.125811] nand: device found, Manufacturer ID: 0xad, Chip ID: 0x  
> 76
> >> >> [    4.131992] nand: Hynix NAND 64MiB 3,3V 8-bit
> >> >> [    4.136173] nand: 64 MiB, SLC, erase size: 16 KiB, page size:>> 512, OOB size: 16
> >> >> [    4.143534] ------------[ cut here ]------------
> >> >> [    4.147934] Unsupported ECC algorithm!
> >> >> [    4.152142] WARNING: CPU: 0 PID: 1 at >> drivers/mtd/nand/raw/nand_base.c:5244 >> nand_scan_with_ids+0x1260/0x1640
> >> >> ...
> >> >> [    4.332052] ---[ end trace e3a36f62cae4ac56 ]---
> >> >> [    4.336882] gpio-nand: probe of c0000000.nand failed with error -2  
> 2
> >> >>
> >> >> Bisected to commit d7157ff49a5b ("mtd: rawnand: Use the ECC >> framework user input parsing bits")
> >> >>
> >> >> My first impression is that with that change, the value set in >> chip->ecc.algo
> >> >> by gpio_nand_probe() in drivers/mtd/nand/raw/gpio.c gets >> overwritten in rawnand_dt_init()
> >> >>
> >> >> The following change fixes the problem, though I'm not sure it >> is the right fix. Can you have a look ?
> >> >>
> >> >> diff --git a/drivers/mtd/nand/raw/nand_base.c >> b/drivers/mtd/nand/raw/nand_base.c
> >> >> index 1f0d542d5923..aa74797cf2da 100644
> >> >> --- a/drivers/mtd/nand/raw/nand_base.c
> >> >> +++ b/drivers/mtd/nand/raw/nand_base.c
> >> >> @@ -5032,7 +5032,8 @@ static int rawnand_dt_init(struct nand_chip *ch  
> ip)
> >> >>    		chip->ecc.engine_type = nand->ecc.defaults.engine_type;
> >> >>
> >> >>    	chip->ecc.placement = nand->ecc.user_conf.placement;
> >> >> -	chip->ecc.algo = nand->ecc.user_conf.algo;
> >> >> +	if (chip->ecc.algo == NAND_ECC_ALGO_UNKNOWN)
> >> >> +		chip->ecc.algo = nand->ecc.user_conf.algo;
> >> >>    	chip->ecc.strength = nand->ecc.user_conf.strength;
> >> >>    	chip->ecc.size = nand->ecc.user_conf.step_size;
> >> >>
> >> >> ---
> >> >>
> >> >> Thanks
> >> >> Christophe  
> >> >
> >> > Sorry for introducing this issue, I didn't had the time to send the
> >> > Fixes PR yet but I think this issue has been solved already. Could
> >> > you please try with a recent linux-next?
> >> >  
> >>
> >> Sorry, same problem with "Linux version 5.10.0-rc2-next-20201104"  
> >
> > Can you please give this patch a try, please?
> >
> > ---8<---
> >
> > Author: Miquel Raynal <miquel.raynal@bootlin.com>
> > Date:   Thu Nov 5 08:44:48 2020 +0100
> >
> >     mtd: rawnand: gpio: Move the ECC initialization to ->attach_chip()
> >
> >     While forcing a Hamming software ECC looks clearly wrong, let's just
> >     fix the situation for now and move these lines to the ->attach_chip()
> >     hook which gets executed after the user input parsing and NAND chip
> >     discovery.
> >
> >     Fixes: d7157ff49a5b ("mtd: rawnand: Use the ECC framework user > input parsing bits")
> >     Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
> >
> > diff --git a/drivers/mtd/nand/raw/gpio.c b/drivers/mtd/nand/raw/gpio.c
> > index 3bd847ccc3f3..6feab847f5e0 100644
> > --- a/drivers/mtd/nand/raw/gpio.c
> > +++ b/drivers/mtd/nand/raw/gpio.c
> > @@ -161,8 +161,15 @@ static int gpio_nand_exec_op(struct nand_chip *chip,
> >         return ret;
> >  }
> >
> > +static int gpio_nand_attach_chip(struct nand_chip *chip)
> > +{
> > +       chip->ecc.mode = NAND_ECC_SOFT;
> > +       chip->ecc.algo = NAND_ECC_HAMMING;
> > +}
> > +
> >  static const struct nand_controller_ops gpio_nand_ops = {
> >         .exec_op = gpio_nand_exec_op,
> > +       .attach_chip = gpio_nand_attach_chip,
> >  };
> >
> >  #ifdef CONFIG_OF
> > @@ -342,8 +349,6 @@ static int gpio_nand_probe(struct platform_device *pd  
> ev)
> >         gpiomtd->base.ops = &gpio_nand_ops;
> >
> >         nand_set_flash_node(chip, pdev->dev.of_node);
> > -       chip->ecc.mode          = NAND_ECC_SOFT;
> > -       chip->ecc.algo          = NAND_ECC_HAMMING;
> >         chip->options           = gpiomtd->plat.options;
> >         chip->controller        = &gpiomtd->base;  
> 
> 
> Works with the following:
> 
> diff --git a/drivers/mtd/nand/raw/gpio.c b/drivers/mtd/nand/raw/gpio.c
> index 4ec0a1e10867..66d3f1eb788c 100644
> --- a/drivers/mtd/nand/raw/gpio.c
> +++ b/drivers/mtd/nand/raw/gpio.c
> @@ -161,8 +161,17 @@ static int gpio_nand_exec_op(struct nand_chip *chip,
>   	return ret;
>   }
> 
> +static int gpio_nand_attach_chip(struct nand_chip *chip)
> +{
> +	chip->ecc.engine_type	= NAND_ECC_ENGINE_TYPE_SOFT;
> +	chip->ecc.algo		= NAND_ECC_ALGO_HAMMING;
> +
> +	return 0;
> +}


Yup indeed it was not even compile tested. Good to know, I'll check
the other drivers and send the patch soon.


Thanks,
Miquèl

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