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From: kernel test robot <lkp@intel.com>
To: Michael Walle <michael@walle.cc>,
	Tudor Ambarus <tudor.ambarus@microchip.com>,
	Pratyush Yadav <p.yadav@ti.com>,
	Miquel Raynal <miquel.raynal@bootlin.com>,
	Richard Weinberger <richard@nod.at>,
	Vignesh Raghavendra <vigneshr@ti.com>
Cc: kbuild-all@lists.01.org, linux-kernel@vger.kernel.org,
	linux-mtd@lists.infradead.org
Subject: Re: [PATCH 5/6] mtd: spi-nor: add generic flash driver
Date: Fri, 13 May 2022 22:47:10 +0800	[thread overview]
Message-ID: <202205132220.uRTFaqNA-lkp@intel.com> (raw)
In-Reply-To: <20220513133520.3945820-6-michael@walle.cc>

Hi Michael,

I love your patch! Perhaps something to improve:

[auto build test WARNING on mtd/spi-nor/next]
[also build test WARNING on next-20220513]
[cannot apply to linux/master linus/master v5.18-rc6]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/intel-lab-lkp/linux/commits/Michael-Walle/mtd-spi-nor-generic-flash-driver/20220513-214238
base:   https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git spi-nor/next
config: m68k-allyesconfig (https://download.01.org/0day-ci/archive/20220513/202205132220.uRTFaqNA-lkp@intel.com/config)
compiler: m68k-linux-gcc (GCC) 11.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/intel-lab-lkp/linux/commit/d38c0ac1528d85bea65fc5a9e7f61a10dbc051fb
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Michael-Walle/mtd-spi-nor-generic-flash-driver/20220513-214238
        git checkout d38c0ac1528d85bea65fc5a9e7f61a10dbc051fb
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=m68k SHELL=/bin/bash drivers/mtd/spi-nor/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> drivers/mtd/spi-nor/sfdp.c:1260: warning: expecting prototype for spi_nor_check_sfdp_header(). Prototype was for spi_nor_check_sfdp_signature() instead


vim +1260 drivers/mtd/spi-nor/sfdp.c

  1249	
  1250	/**
  1251	 * spi_nor_check_sfdp_header() - check for a valid SFDP header
  1252	 * @nor:		pointer to a 'struct spi_nor'
  1253	 *
  1254	 * Used to detect if the flash supports the RDSFDP command as well as the
  1255	 * presence of a valid SFDP table.
  1256	 *
  1257	 * Return: 0 on success, -errno otherwise.
  1258	 */
  1259	int spi_nor_check_sfdp_signature(struct spi_nor *nor)
> 1260	{
  1261		u32 signature;
  1262		int err;
  1263	
  1264		/* Get the SFDP header. */
  1265		err = spi_nor_read_sfdp_dma_unsafe(nor, 0, sizeof(signature),
  1266						   &signature);
  1267		if (err < 0)
  1268			return err;
  1269	
  1270		/* Check the SFDP signature. */
  1271		if (le32_to_cpu(signature) != SFDP_SIGNATURE)
  1272			return -EINVAL;
  1273	
  1274		return 0;
  1275	}
  1276	

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp

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WARNING: multiple messages have this Message-ID
From: Biju Das <biju.das.jz@bp.renesas.com>
To: michael@walle.cc
Cc: linux-kernel@vger.kernel.org, linux-mtd@lists.infradead.org,
	miquel.raynal@bootlin.com, p.yadav@ti.com, richard@nod.at,
	tudor.ambarus@microchip.com, vigneshr@ti.com
Subject: Re: [PATCH 5/6] mtd: spi-nor: add generic flash driver
Date: Thu, 21 Jul 2022 10:32:16 +0100	[thread overview]
Message-ID: <202205132220.uRTFaqNA-lkp@intel.com> (raw) (raw)
Message-ID: <20220721093216.ZjX_zjDkJZMtmnR28nTDJ9N1o8EEFvo9ONrim9KYd5I@z> (raw)
In-Reply-To: <20220513133520.3945820-6-michael@walle.cc>

> Our SFDP is parsing is everything we need to support all basic operations of
> a flash device. If the flash isn't found in our in-kernel flash database,
> gracefully fall back to a driver described solely by its SFDP tables.
> 
> It is still recommended to add the flash to the in-kernel database.
> First, we get a proper partname and secondly, for all features not described
> by the SFDP like OTP we need the entry anyway.
> 
> Signed-off-by: Michael Walle <michael@walle.cc>
> ---
>  drivers/mtd/spi-nor/core.c | 13 +++++++++++++  drivers/mtd/spi-nor/core.h |
> 1 +  drivers/mtd/spi-nor/sfdp.c | 27 +++++++++++++++++++++++++++
>  3 files changed, 41 insertions(+)
> 
> diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c index
> 65cd8e668579..ee193a61310a 100644
> --- a/drivers/mtd/spi-nor/core.c
> +++ b/drivers/mtd/spi-nor/core.c
> @@ -1632,6 +1632,11 @@ static const struct spi_nor_manufacturer
> *manufacturers[] = {
>  	&spi_nor_xmc,
>  };
> 
> +static const struct flash_info spi_nor_generic_flash = {
> +	.name = "spi-nor-generic",
> +	.parse_sfdp = true,
> +};
> +
>  static const struct flash_info *spi_nor_match_id(struct spi_nor *nor,
>  						 const u8 *id)
>  {
> @@ -1670,6 +1675,14 @@ static const struct flash_info *spi_nor_detect(struct
> spi_nor *nor)
>  		return ERR_PTR(-ENOMEM);
> 
>  	info = spi_nor_match_id(nor, id);
> +
> +	/* Fallback to a generic flash described only by its SFDP data. */
> +	if (!info) {
> +		ret = spi_nor_check_sfdp_signature(nor);
> +		if (!ret)
> +			info = &spi_nor_generic_flash;
> +	}

May be this can be combined as

 	if (!info && (!spi_nor_check_sfdp_signature(nor)))
		info = &spi_nor_generic_flash;

Cheers,
Biju

>  	if (!info) {
>  		dev_err(nor->dev, "unrecognized JEDEC id bytes: %*ph\n",
>  			SPI_NOR_MAX_ID_LEN, id);
> diff --git a/drivers/mtd/spi-nor/core.h b/drivers/mtd/spi-nor/core.h index
> 153cb4b174ee..b084cb6db401 100644
> --- a/drivers/mtd/spi-nor/core.h
> +++ b/drivers/mtd/spi-nor/core.h
> @@ -703,6 +703,7 @@ int spi_nor_controller_ops_read_reg(struct spi_nor *nor,
> u8 opcode,  int spi_nor_controller_ops_write_reg(struct spi_nor *nor, u8
> opcode,
>  				     const u8 *buf, size_t len);
> 
> +int spi_nor_check_sfdp_signature(struct spi_nor *nor);
>  int spi_nor_parse_sfdp(struct spi_nor *nor);
> 
>  static inline struct spi_nor *mtd_to_spi_nor(struct mtd_info *mtd) diff --
> git a/drivers/mtd/spi-nor/sfdp.c b/drivers/mtd/spi-nor/sfdp.c index
> a5211543d30d..9bdb3d5dc7e8 100644
> --- a/drivers/mtd/spi-nor/sfdp.c
> +++ b/drivers/mtd/spi-nor/sfdp.c
> @@ -1247,6 +1247,33 @@ static void spi_nor_post_sfdp_fixups(struct spi_nor
> *nor)
>  		nor->info->fixups->post_sfdp(nor);
>  }
> 
> +/**
> + * spi_nor_check_sfdp_header() - check for a valid SFDP header
> + * @nor:		pointer to a 'struct spi_nor'
> + *
> + * Used to detect if the flash supports the RDSFDP command as well as
> +the
> + * presence of a valid SFDP table.
> + *
> + * Return: 0 on success, -errno otherwise.
> + */
> +int spi_nor_check_sfdp_signature(struct spi_nor *nor) {
> +	u32 signature;
> +	int err;
> +
> +	/* Get the SFDP header. */
> +	err = spi_nor_read_sfdp_dma_unsafe(nor, 0, sizeof(signature),
> +					   &signature);
> +	if (err < 0)
> +		return err;
> +
> +	/* Check the SFDP signature. */
> +	if (le32_to_cpu(signature) != SFDP_SIGNATURE)
> +		return -EINVAL;
> +
> +	return 0;
> +}
> +
>  /**
>   * spi_nor_parse_sfdp() - parse the Serial Flash Discoverable Parameters.
>   * @nor:		pointer to a 'struct spi_nor'
> --
> 2.25.1



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  reply	other threads:[~2022-05-13 14:48 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-05-13 13:35 [PATCH 0/6] mtd: spi-nor: generic flash driver Michael Walle
2022-05-13 13:35 ` [PATCH 1/6] mtd: spi-nor: hide jedec_id sysfs attribute if not present Michael Walle
2022-07-26 10:00   ` Takahiro Kuwano
2022-05-13 13:35 ` [PATCH 2/6] mtd: spi-nor: sysfs: hide manufacturer if it is not set Michael Walle
2022-07-26 10:04   ` Takahiro Kuwano
2022-05-13 13:35 ` [PATCH 3/6] mtd: spi-nor: remember full JEDEC flash ID Michael Walle
2022-07-29  1:00   ` Takahiro Kuwano
2022-05-13 13:35 ` [PATCH 4/6] mtd: spi-nor: move function declaration out of sfdp.h Michael Walle
2022-07-26 23:41   ` Takahiro Kuwano
2022-05-13 13:35 ` [PATCH 5/6] mtd: spi-nor: add generic flash driver Michael Walle
2022-05-13 14:47   ` kernel test robot [this message]
2022-07-21  9:32     ` Biju Das
2022-07-21  9:48     ` Michael Walle
2022-07-21  9:52       ` Biju Das
2022-10-28 18:00         ` Biju Das
2022-07-28  3:28   ` Tudor.Ambarus
2022-07-29  1:40   ` Takahiro Kuwano
2022-05-13 13:35 ` [PATCH 6/6] mtd: spi-nor: sysfs: print JEDEC ID for " Michael Walle
2022-07-29  1:25   ` Takahiro Kuwano
2022-07-26  8:06 ` [PATCH 0/6] mtd: spi-nor: " Tudor.Ambarus
2022-07-29  1:52   ` Takahiro Kuwano
2022-07-29  5:34     ` Tudor.Ambarus

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