linux-kernel - Re: [PATCH V5 1/3] platform/x86: Add Intel Software Defined Silicon driver

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Date:   Fri, 04 Feb 2022 09:01:07 -0800
From:   "David E. Box" <david.e.box@...ux.intel.com>
To:     Joe Perches <joe@...ches.com>, hdegoede@...hat.com,
        gregkh@...uxfoundation.org, andriy.shevchenko@...ux.intel.com,
        srinivas.pandruvada@...el.com, mgross@...ux.intel.com
Cc:     linux-kernel@...r.kernel.org, platform-driver-x86@...r.kernel.org,
        Mark Gross <markgross@...nel.org>
Subject: Re: [PATCH V5 1/3] platform/x86: Add Intel Software Defined Silicon
 driver

On Fri, 2022-02-04 at 06:01 -0800, Joe Perches wrote:
> On Fri, 2022-02-04 at 05:23 -0800, David E. Box wrote:
> > On Fri, 2022-02-04 at 02:14 -0800, Joe Perches wrote:
> > > On Thu, 2022-02-03 at 21:30 -0800, David E. Box wrote:
> []
> > > >   - In binary attribute handlers where ret is only used for errors,
> > > >     replace,
> > > >               return (ret < 0) ? ret : size;
> > > >     with,
> > > >               return ret ?: size;
> > > 
> > > I think this style overly tricky.
> > > 
> > > Why not the canonical:
> > > 
> > > 	if (ret < 0)
> > > 		return ret;
> > > 
> > > 	return size;
> > 
> > I can see not using the 2 parameter shortcut of the ternary operator, but
> > the
> > regular 3 parameter expression is easy to read for simple operations.
> 
> The issue to me is it combines an error test and error return
> with the common return.

Ah, okay.

> 
> it's also being used and avoided / naked with the similar
> 
> 	return min(ret, size);
> 
> https://lore.kernel.org/lkml/20211116121014.1675-1-zhaoxiao@uniontech.com/T/

Thanks.