Re: [PATCH 3/13] drivers/media/tuners/qt1010.c: use macros fori2c_msg initialization

From: Jean Delvare
Date: Tue Oct 09 2012 - 08:12:27 EST


Hi Julia,

On Mon, 8 Oct 2012 07:24:11 +0200 (CEST), Julia Lawall wrote:
> > Sorry, I mean either:
> >
> > I2C_MSG_WRITE(priv->cfg->i2c_address, &reg, sizeof(reg)),
> > I2C_MSG_READ(priv->cfg->i2c_address, val, sizeof(*val)),
>
> Of course. Sorry for not having seen that. I can do that.

Eek, no, you can't, not in the general case at least. sizeof(*val) will
return the size of the _first_ element of the destination buffer, which
has nothing to do with the length of that buffer (which in turn might
be rightfully longer than the read length for this specific message.)

--
Jean Delvare
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/