Hi,
Igor Grinberg writes:
>
>
> On 02/03/11 13:00, Poddar, Sourav wrote:
>
> > On Thu, Feb 3, 2011 at 3:47 PM, Igor Grinberg <grinberg@xxxxxxxxxxxxxx> wrote:
> >> if (pdata->get_pendown_state) {
> >> ts->get_pendown_state = pdata->get_pendown_state;
> >> ts->gpio_pendown = -1;
> >> return 0;
> >> }
> > Yes we can do so .I initialise it at a place where other variables
> > where initialised.
> >
> >>> Also, why don't we use -EINVAL for the invalid gpio number instead of -1 constant?
> >>>
> > I used -1 because conditional check done in probe ads7846_probe function
> > used this value.
> >
> > err_free_gpio:
> > if (ts->gpio_pendown != -1)
> > gpio_free(ts->gpio_pendown);
> >
>
> Well I understand that and that's why in my proposal I used -1 also, but
> I thought we can make it even better if we switch to -EINVAL
> (though wanted to check if there are any reasonable objections)
> and while you are at this, may be you are willing also to submit a patch for this?
>
Since ts->gpio_pendown is used as a GPIO number, the check with
gpio_is_valid(), as suggested by Felipe Balbi, would be the most
sensible thing to do here.
Lothar WaÃmann
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