Re: [PATCH 7/8] Psmouse - add packet size

[Vojtech Pavlik <vojtech@suse.cz>]

On Wed, Sep 29, 2004 at 01:47:34AM -0500, Dmitry Torokhov wrote:

> -int alps_detect(struct psmouse *psmouse)
> +int alps_detect(struct psmouse *psmouse, int set_properties)
>  {
> -	return alps_get_model(psmouse) < 0 ? 0 : 1;
> +	if (alps_get_model(psmouse) < 0)
> +		return 0;
> +
> +	if (set_properties) {
> +		psmouse->vendor = "ALPS";
> +		psmouse->name = "TouchPad";
> +	}
> +	return 1;
>  }

I think we should return -1 (or -errno) on failure and 0 on success,
like everybody else does.

> -	return param[0] == 3;
> +	if (param[0] == 3) {
> +		if (set_properties) {
> +			set_bit(REL_WHEEL, psmouse->dev.relbit);
> +
> +			if (!psmouse->vendor) psmouse->vendor = "Generic";
> +			if (!psmouse->name) psmouse->name = "Wheel Mouse";
> +			psmouse->pktsize = 4;
> +		}
> +		return 1;
> +	}
> +	return 0;
>  }

This should be:

	if (param[0] != 3) 
		return -1;
	if (set_properties) {
		set_bit(REL_WHEEL, psmouse->dev.relbit);
		if (!psmouse->vendor) psmouse->vendor = "Generic";
		if (!psmouse->name) psmouse->name = "Wheel Mouse";
		psmouse->pktsize = 4;
	}
	return 0;

... and similarly elsewhere. You save one level of nesting and it makes
more sense.

-- 
Vojtech Pavlik
SuSE Labs, SuSE CR