Messages in this thread | | | Subject | Re: [PATCH] USB: serial: ark3116.c: Remove unused TIOCSSERIAL case from ioctl | From | Oliver Neukum <> | Date | Wed, 13 Dec 2017 15:39:21 +0100 |
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Am Mittwoch, den 13.12.2017, 15:30 +0300 schrieb Mikhail Zaytsev: > On Wed, 13 Dec 2017 12:40:48 +0100 Oliver Neukum <oneukum@suse.com> wrote: > > > > > 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. > > Thanks. I hear you, Oliver. What about: > > - serstruct.baud_base = 460800; > > Is it a magic number? I think yes. >
Hi,
yes sure. That is a candidate for a symbolic name. Though if you use it once, I see no benefit, but it does not hurt either. The member is named and that is the important thing.
A line like
if (rate > 38400) return -EINVAL;
is not so good
if (rate > MAX_BAUD) return -EINVAL;
better
But:
device->maxbaudrate = 38400
is better than
device->maxbaudrate = MAX_BAUD
You see the point?
Regards Oliver
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