Messages in this thread Patch in this message | | | Date | Thu, 05 Nov 2020 10:06:51 +0100 | From | Christophe Leroy <> | Subject | Re: Kernel 5.10-rc1 not mounting NAND flash (Bisected to d7157ff49a5b ("mtd: rawnand: Use the ECC framework user input parsing bits")) |
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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
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