linux-kernel - Re: [PATCH v2 2/3] staging: fbtft: Replace magic number with constant

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Date:   Tue, 14 Feb 2017 19:36:28 -0800
From:   Joe Perches <joe@...ches.com>
To:     "Tobin C. Harding" <me@...in.cc>,
        Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
        noralf@...nnes.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/3] staging: fbtft: Replace magic number with
 constant

On Wed, 2017-02-15 at 14:27 +1100, Tobin C. Harding wrote:
> Current call to strncmp() uses a magic number. There is a compile
> time constant defined for this buffer, included and used already at
> other sites in the file.
> 
> Remove magic number. Replace with pre-existing compile time constant.

OK thanks, as well:

> diff --git a/drivers/staging/fbtft/fbtft_device.c b/drivers/staging/fbtft/fbtft_device.c
[]
> @@ -1489,7 +1489,7 @@ static int __init fbtft_device_init(void)
>  	}
>  
>  	for (i = 0; i < ARRAY_SIZE(displays); i++) {
> -		if (strncmp(name, displays[i].name, 32) == 0) {
> +		if (strncmp(name, displays[i].name, SPI_NAME_SIZE) == 0) {

Maybe change this to:

		if (strncmp(name, displays[i].name, SPI_NAME_SIZE) != 0)
			continue;

and reduce the indentation of the rest of the block.