[PATCH] GPIO: Add gpio_to_desc helper

[Jean-Christophe PLAGNIOL-VILLARD]

On 14:54 Sat 11 May     , Alexander Shiyan wrote:
> > On 18:04 Fri 10 May     , Alexander Shiyan wrote:
> > > Patch adds gpio_to_desc helper for validate GPIO.
> > > A bit optimization is performed (about -250 bytes on ARM).
> > > 
> > > Signed-off-by: Alexander Shiyan <shc_work at mail.ru>
> > > ---
> > >  drivers/gpio/gpiolib.c | 97 ++++++++++++++++++++++++++------------------------
> > >  1 file changed, 51 insertions(+), 46 deletions(-)
> > > 
> > > diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
> > > index 6398268..d7aa094 100644
> > > --- a/drivers/gpio/gpiolib.c
> > > +++ b/drivers/gpio/gpiolib.c
> > > @@ -32,20 +32,30 @@ static int gpio_ensure_requested(struct gpio_info *gi, int gpio)
> > >  	return gpio_request(gpio, "gpio");
> > >  }
> > >  
> > > +static struct gpio_info *gpio_to_desc(unsigned gpio)
> > > +{
> > > +	if (!gpio_is_valid(gpio))
> > put the WARN too as we need to known a gpio_xxx is used on a non valid gpio
> 
> Original bb code does not contain any warnings here. So if it really
> necessary it can be added later.

put it as we keep the code inline with the kernel a key point for sync
> 
> ---