linux-kernel - Re: [PATCH v1.1] gpiolib: append SFI helpers for GPIO API

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Date:	Sun, 02 Jun 2013 19:06:10 -0700
From:	Joe Perches <joe@...ches.com>
To:	Ryan Mallon <rmallon@...il.com>
Cc:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Linus Walleij <linus.walleij@...aro.org>,
	Sathyanarayanan Kuppuswamy <sathyanarayanan.kuppuswamy@...el.com>,
	Grant Likely <grant.likely@...retlab.ca>,
	Len Brown <lenb@...nel.org>, linux-kernel@...r.kernel.org,
	David Cohen <david.a.cohen@...el.com>,
	Grant Likely <grant.likely@...aro.org>
Subject: Re: [PATCH v1.1] gpiolib: append SFI helpers for GPIO API

On Mon, 2013-06-03 at 11:59 +1000, Ryan Mallon wrote:
> On 31/05/13 19:27, Andy Shevchenko wrote:
> Some trivial coding style comment below.
[]
> > +	for (i = 0; i < sfi_gpio_num_entry; i++, pentry++) {
> > +		if (!strncmp(name, pentry->pin_name, SFI_NAME_LEN))
> > +			return pentry->pin_no;
> > +	}
> 
> Nitpick - Don't need the braces on the for loop.

I'm not Andy but I think it's preferable to keep the braces
when there's an if in the for loop.

> > +	sfi_gpio_table = kmalloc(num * sizeof(*pentry), GFP_KERNEL);
> 
> Use kcalloc when you have a size and a count.

kmalloc_array unless you want zero'ed memory

> > +	for (i = 0; i < num; i++, pentry++)
> > +		pr_debug("[%2d] chip = %16.16s, name = %16.16s, pin=%d\n", i,
> > +			 pentry->controller_name, pentry->pin_name,
> > +			 pentry->pin_no);
> 
> Why "%16.16s" here? "%16s" will right justify with leading spaces, or
> "%-16s" will left justify with trailing spaces.

This limits the emitted length to 16 regardless of
strlen(pentry->controller_name) / strlen(pentry->pin_name)


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