Re: [PATCH] USB: serial: ark3116.c: Remove unused TIOCSSERIAL case from ioctl

[Oliver Neukum]

Am Mittwoch, den 13.12.2017, 14:31 +0300 schrieb Mikhail Zaytsev:
> On Wed, 13 Dec 2017 11:17:28 +0100 Oliver Neukum <oneukum@xxxxxxxx> wrote:
> 
> > 
> > Am Mittwoch, den 13.12.2017, 12:30 +0300 schrieb Mikhail Zaytsev:
> > > 
> > > +#define RS232_VENDOR 0x6547
> > > +#define RS232_PRODUCT 0x0232
> > > +#define IRDA_VENDOR 0x18ec
> > > +#define IRDA_PRODUCT 0x3118
> > > Â
> > > Â/* usb timeout of 1 second */
> > > Â#define ARK_TIMEOUT 1000
> > > Â
> > > Âstatic const struct usb_device_id id_table[] = {
> > > -ÂÂÂÂÂÂÂ{ USB_DEVICE(0x6547, 0x0232) },
> > > -ÂÂÂÂÂÂÂ{ USB_DEVICE(0x18ec, 0x3118) },ÂÂÂÂÂÂÂÂÂ/* USB to IrDA adapter */
> > > +ÂÂÂÂÂÂÂ{ USB_DEVICE(RS232_VENDOR, RS232_PRODUCT) },
> > > +ÂÂÂÂÂÂÂ{ USB_DEVICE(IRDA_VENDOR, IRDA_PRODUCT) }, /* USB to IrDA adapter */  
> > 
> > Hi,
> > 
> > what is the purpose of this change? It just makes it harder to grep.
> > The constants are arbitrary and they are clearly device IDs.
> 
> The constants are using in several places. 
> I think the names easier to read.

They give you nothing. If you are looking at a vendor ID nothing but the
bare number makes sense. You are just making peoples' life harder when
they have to look up that definition. A symbolic name is fine if it gives
meaning. Even if the information you give is that the value is magic
and therefore not understood. But a vendor ID is an arbitrary yet
meaningful number. There is no point in hiding it.

	Regards
		Oliver