Re: [PATCH 4/7] mtd: spi-nor: Split spi_nor_init_params()

[Boris Brezillon <boris.brezillon@collabora.com>]

On Wed, 31 Jul 2019 09:03:33 +0000
<Tudor.Ambarus@microchip.com> wrote:

> From: Tudor Ambarus <tudor.ambarus@microchip.com>
> 
> Add functions to delimit what the chunks of code do:
> 
> static void spi_nor_init_params()
> {
> 	spi_nor_default_init_params()
> 	spi_nor_manufacturer_init_params()
> 	spi_nor_sfdp_init_params()
> }
> 
> spi_nor_init_params() becomes of type void, as all its children
> return void.
> 
> Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>

Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>

> ---
>  drivers/mtd/spi-nor/spi-nor.c | 58 ++++++++++++++++++++++++-------------------
>  1 file changed, 32 insertions(+), 26 deletions(-)
> 
> diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c
> index a906c36260c8..b2e72668e7ab 100644
> --- a/drivers/mtd/spi-nor/spi-nor.c
> +++ b/drivers/mtd/spi-nor/spi-nor.c
> @@ -4312,6 +4312,25 @@ static void spi_nor_mfr_init_params(struct spi_nor *nor,
>  	}
>  }
>  
> +static void spi_nor_sfdp_init_params(struct spi_nor *nor,
> +				     struct spi_nor_flash_parameter *params)
> +{
> +	struct spi_nor_flash_parameter sfdp_params;
> +	struct spi_nor_erase_map prev_map;
> +
> +	memcpy(&sfdp_params, params, sizeof(sfdp_params));
> +	memcpy(&prev_map, &nor->erase_map, sizeof(prev_map));
> +
> +	if (spi_nor_parse_sfdp(nor, &sfdp_params)) {
> +		nor->addr_width = 0;
> +		nor->flags &= ~SNOR_F_4B_OPCODES;
> +		/* restore previous erase map */
> +		memcpy(&nor->erase_map, &prev_map, sizeof(nor->erase_map));
> +	} else {
> +		memcpy(params, &sfdp_params, sizeof(*params));
> +	}
> +}
> +
>  static void
>  spi_nor_manufacturer_init_params(struct spi_nor *nor,
>  				 struct spi_nor_flash_parameter *params)
> @@ -4323,8 +4342,8 @@ spi_nor_manufacturer_init_params(struct spi_nor *nor,
>  		return nor->info->fixups->default_init(nor, params);
>  }
>  
> -static int spi_nor_init_params(struct spi_nor *nor,
> -			       struct spi_nor_flash_parameter *params)
> +static void spi_nor_default_init_params(struct spi_nor *nor,
> +					struct spi_nor_flash_parameter *params)
>  {
>  	struct spi_nor_erase_map *map = &nor->erase_map;
>  	const struct flash_info *info = nor->info;
> @@ -4397,29 +4416,18 @@ static int spi_nor_init_params(struct spi_nor *nor,
>  	spi_nor_set_erase_type(&map->erase_type[i], info->sector_size,
>  			       SPINOR_OP_SE);
>  	spi_nor_init_uniform_erase_map(map, erase_mask, params->size);
> +}
>  
> -	spi_nor_manufacturer_init_params(nor, params);
> -
> -	if ((info->flags & (SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ)) &&
> -	    !(info->flags & SPI_NOR_SKIP_SFDP)) {
> -		struct spi_nor_flash_parameter sfdp_params;
> -		struct spi_nor_erase_map prev_map;
> -
> -		memcpy(&sfdp_params, params, sizeof(sfdp_params));
> -		memcpy(&prev_map, &nor->erase_map, sizeof(prev_map));
> +static void spi_nor_init_params(struct spi_nor *nor,
> +				struct spi_nor_flash_parameter *params)
> +{
> +	spi_nor_default_init_params(nor, params);
>  
> -		if (spi_nor_parse_sfdp(nor, &sfdp_params)) {
> -			nor->addr_width = 0;
> -			nor->flags &= ~SNOR_F_4B_OPCODES;
> -			/* restore previous erase map */
> -			memcpy(&nor->erase_map, &prev_map,
> -			       sizeof(nor->erase_map));
> -		} else {
> -			memcpy(params, &sfdp_params, sizeof(*params));
> -		}
> -	}
> +	spi_nor_manufacturer_init_params(nor, params);
>  
> -	return 0;
> +	if ((nor->info->flags & (SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ)) &&
> +	    !(nor->info->flags & SPI_NOR_SKIP_SFDP))
> +		spi_nor_sfdp_init_params(nor, params);
>  }
>  
>  static int spi_nor_select_read(struct spi_nor *nor,
> @@ -4794,10 +4802,8 @@ int spi_nor_scan(struct spi_nor *nor, const char *name,
>  	/* Kept only for backward compatibility purpose. */
>  	nor->quad_enable = spansion_quad_enable;
>  
> -	/* Parse the Serial Flash Discoverable Parameters table. */
> -	ret = spi_nor_init_params(nor, &params);
> -	if (ret)
> -		return ret;
> +	/* Init flash parameters based on flash_info struct and SFDP */
> +	spi_nor_init_params(nor, &params);
>  
>  	if (!mtd->name)
>  		mtd->name = dev_name(dev);