Re: [PATCH] staging: iio: adc: ad7192: Add spaces around minus operator

Jeremy Sowden
2019-03-11T09:29:05Z

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On 2019-03-11, at 11:31:59 +0300, Dan Carpenter wrote:
> On Mon, Mar 11, 2019 at 10:12:48AM +0200, Alexandru Ardelean wrote:
> > On Sun, Mar 10, 2019 at 11:23 PM Karen Palacio
> > <karen.palacio.1994@gmail.com> wrote:
> > >
> > > Add spaces around minus operator to fix readibility.
> > >
> > > Signed-off-by: Karen Palacio <karen.palacio.1994@gmail.com>
> > > ---
> > > drivers/staging/iio/adc/ad7192.c | 2 +-
> > > 1 file changed, 1 insertion(+), 1 deletion(-)
> > >
> > > diff --git a/drivers/staging/iio/adc/ad7192.c b/drivers/staging/iio/adc/ad7192.c
> > > index acdbc07..7c632cf 100644
> > > --- a/drivers/staging/iio/adc/ad7192.c
> > > +++ b/drivers/staging/iio/adc/ad7192.c
> > > @@ -355,7 +355,7 @@ ad7192_show_scale_available(struct device *dev,
> > > }
> > >
> > > static IIO_DEVICE_ATTR_NAMED(in_v_m_v_scale_available,
> > > - in_voltage-voltage_scale_available,
> > > + in_voltage - voltage_scale_available,
> >
> > This isn't broken, but I do agree it should be addressed. I think
> > it's the second time I see a similar patch trying to fix this. So,
> > obviously the code is a bit misleading.
> >
>
> It's got to be more than that. I did a simple grep of my inbox and it
> says that this is the 13th time someone has tried to do this. It's
> possible that my grep is wrong, 13 seems high but not totaly
> impossible.

The second parameter of IIO_DEVICE_ATTR_NAMED is a name which is
eventually stringified, not an arithmetic expression.

#define IIO_DEVICE_ATTR_NAMED(_vname, _name, _mode, _show, _store, \
_addr) \
struct iio_dev_attr iio_dev_attr_##_vname \
= IIO_ATTR(_name, _mode, _show, _store, _addr)

which is defined as:

#define IIO_ATTR(_name, _mode, _show, _store, _addr) \
{ .dev_attr = __ATTR(_name, _mode, _show, _store), \
.address = _addr }

which is defined as:

#define __ATTR(_name, _mode, _show, _store) { \
.attr = {.name = __stringify(_name), \
.mode = VERIFY_OCTAL_PERMISSIONS(_mode) }, \
.show = _show, \
.store = _store, \
}

J.

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