Re: [RFC/RFT] Raw access to serio ports (1/2)

[Andrew Morton <akpm@osdl.org>]

Dmitry Torokhov <dtor_core@ameritech.net> wrote:
>
> Hi,
> 
> Below is an implementation of rawdev driver.

Yes, it does appear that we need the feature, thanks.

> Comments?

They're the thingies inside /* and */.  Your patch is refreshingly free of
them ;)

> +static ssize_t rawdev_write(struct file *file, const char *buffer, size_t count, loff_t *ppos)
> +{
> +	struct rawdev_list *list = file->private_data;
> +	ssize_t written = 0;
> +	int retval;
> +	unsigned char c;
> +
> +	retval = down_interruptible(&rawdev_sem);
> +	if (retval)
> +		return retval;
> +
> +	if (!list->rawdev->serio) {
> +		retval = -ENODEV;
> +		goto out;
> +	}

The return values here are mucked up - this function returns `written'.

> +	if (count > 32)
> +		count = 32;

Why?  (Don't tell me - add a comment!)