linux-kernel - Re: [PATCH] regmap: Fix the size calculation for map->format.buf

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Date:	Thu, 31 May 2012 17:17:35 -0700
From:	Joe Perches <joe@...ches.com>
To:	Fabio Estevam <festevam@...il.com>
Cc:	broonie@...nsource.wolfsonmicro.com, gregkh@...uxfoundation.org,
	marc@...esign.com.au, philippe.retornaz@...l.ch,
	linux-kernel@...r.kernel.org,
	Fabio Estevam <fabio.estevam@...escale.com>
Subject: Re: [PATCH] regmap: Fix the size calculation for
 map->format.buf_size

On Thu, 2012-05-31 at 21:10 -0300, Fabio Estevam wrote:
> the total size should be calculated by summing up the number of bits of
> each element and using a DIV_ROUND_UP to return the number of bytes.
[]
> diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
[]
> @@ -246,11 +246,11 @@ struct regmap *regmap_init(struct device *dev,
>  		map->lock = regmap_lock_mutex;
>  		map->unlock = regmap_unlock_mutex;
>  	}
> -	map->format.buf_size = (config->reg_bits + config->val_bits) / 8;
>  	map->format.reg_bytes = DIV_ROUND_UP(config->reg_bits, 8);
>  	map->format.pad_bytes = config->pad_bits / 8;
>  	map->format.val_bytes = DIV_ROUND_UP(config->val_bits, 8);
> -	map->format.buf_size += map->format.pad_bytes;
> +	map->format.buf_size = DIV_ROUND_UP(config->reg_bits +
> +			config->val_bits + config->pad_bits, 8);
>  	map->reg_shift = config->pad_bits % 8;

s/8/BITS_PER_BYTE/ ?


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