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Re: [PATCH 09/20] regmap: _regmap_raw_write fix for busses without write()

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On Wed, Aug 12, 2015 at 12:12:34PM +0200, Markus Pargmann wrote:

> @@ -1229,6 +1229,11 @@ int _regmap_raw_write(struct regmap *map, unsigned int reg,
>  		}
>  	}
>  
> +	if (!map->bus->write && val_len == map->format.val_bytes) {
> +		ret = _regmap_bus_reg_write(map, reg, *(unsigned int *)val);
> +		return ret;
> +	}

This is broken - you can't use a raw value as a register value.  The
endianness of the device may not be the same as the endianness of the
system and you can't cast a value to unsigned int, the value may be of
any size.

> @@ -1340,7 +1345,7 @@ int _regmap_raw_write(struct regmap *map, unsigned int reg,
>  	 * send the work_buf directly, otherwise try to do a gather
>  	 * write.
>  	 */
> -	if (val == work_val) {
> +	if (val == work_val && map->bus->write) {
>  		ret = map->bus->write(map->bus_context, map->work_buf,
>  				      map->format.reg_bytes +
>  				      map->format.pad_bytes +

This appears to be another case of merging an unrelated change :(

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[PATCH 00/20] Regmap max_raw_io and bmc150 SPI support Markus Pargmann <mpa@pengutronix.de> - 2015-08-12 12:20 +0200
  [PATCH 17/20] iio: bmc150: Use i2c regmap Markus Pargmann <mpa@pengutronix.de> - 2015-08-12 12:20 +0200
    Re: [PATCH 17/20] iio: bmc150: Use i2c regmap Mark Brown <broonie@kernel.org> - 2015-08-12 14:10 +0200
      Re: [PATCH 17/20] iio: bmc150: Use i2c regmap Markus Pargmann <mpa@pengutronix.de> - 2015-08-12 15:00 +0200
    Re: [PATCH 17/20] iio: bmc150: Use i2c regmap Jonathan Cameron <jic23@kernel.org> - 2015-08-15 15:30 +0200
      Re: [PATCH 17/20] iio: bmc150: Use i2c regmap Markus Pargmann <mpa@pengutronix.de> - 2015-08-17 09:50 +0200
  [PATCH 15/20] regmap-i2c: Add smbus i2c block support Markus Pargmann <mpa@pengutronix.de> - 2015-08-12 12:20 +0200
    Re: [PATCH 15/20] regmap-i2c: Add smbus i2c block support Mark Brown <broonie@kernel.org> - 2015-08-12 14:00 +0200
      Re: [PATCH 15/20] regmap-i2c: Add smbus i2c block support Markus Pargmann <mpa@pengutronix.de> - 2015-08-12 15:00 +0200
  [PATCH 01/20] regmap: Add missing comments about struct regmap_bus Markus Pargmann <mpa@pengutronix.de> - 2015-08-12 12:30 +0200
    Re: [PATCH 01/20] regmap: Add missing comments about struct regmap_bus Hartmut Knaack <knaack.h@gmx.de> - 2015-08-12 22:20 +0200
      Re: [PATCH 01/20] regmap: Add missing comments about struct  regmap_bus Markus Pargmann <mpa@pengutronix.de> - 2015-08-17 09:20 +0200
  [PATCH 09/20] regmap: _regmap_raw_write fix for busses without write() Markus Pargmann <mpa@pengutronix.de> - 2015-08-12 12:30 +0200
    Re: [PATCH 09/20] regmap: _regmap_raw_write fix for busses without  write() Mark Brown <broonie@kernel.org> - 2015-08-12 13:30 +0200
      Re: [PATCH 09/20] regmap: _regmap_raw_write fix for busses without  write() Markus Pargmann <mpa@pengutronix.de> - 2015-08-12 14:30 +0200
        Re: [PATCH 09/20] regmap: _regmap_raw_write fix for busses without  write() Mark Brown <broonie@kernel.org> - 2015-08-12 14:40 +0200
          Re: [PATCH 09/20] regmap: _regmap_raw_write fix for busses without  write() Markus Pargmann <mpa@pengutronix.de> - 2015-08-12 15:10 +0200
            Re: [PATCH 09/20] regmap: _regmap_raw_write fix for busses without  write() Mark Brown <broonie@kernel.org> - 2015-08-15 04:20 +0200
  [PATCH 10/20] regmap: _regmap_raw_multi_reg_write: Add reg_write() support Markus Pargmann <mpa@pengutronix.de> - 2015-08-12 12:30 +0200
    Re: [PATCH 10/20] regmap: _regmap_raw_multi_reg_write: Add  reg_write() support Mark Brown <broonie@kernel.org> - 2015-08-12 14:50 +0200
      Re: [PATCH 10/20] regmap: _regmap_raw_multi_reg_write: Add  reg_write() support Markus Pargmann <mpa@pengutronix.de> - 2015-08-12 15:20 +0200
  [PATCH 08/20] regmap: Fix regmap_can_raw_write check Markus Pargmann <mpa@pengutronix.de> - 2015-08-12 12:30 +0200
  Re: [PATCH 00/20] Regmap max_raw_io and bmc150 SPI support Mark Brown <broonie@kernel.org> - 2015-08-12 12:40 +0200
    Re: [PATCH 00/20] Regmap max_raw_io and bmc150 SPI support Markus Pargmann <mpa@pengutronix.de> - 2015-08-12 12:50 +0200
      Re: [PATCH 00/20] Regmap max_raw_io and bmc150 SPI support Mark Brown <broonie@kernel.org> - 2015-08-15 04:20 +0200

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