linux-kernel - Re: [PATCH 13/33] Input: bfin_rotary - Use 'dev' instead of dereferencing it and other changes

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Date:   Thu, 19 Jan 2017 00:25:45 -0800
From:   Guenter Roeck <linux@...ck-us.net>
To:     Joe Perches <joe@...ches.com>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:     linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 13/33] Input: bfin_rotary - Use 'dev' instead of
 dereferencing it and other changes

On 01/18/2017 08:58 PM, Joe Perches wrote:
> On Wed, 2017-01-18 at 12:35 -0800, Guenter Roeck wrote:
>> On Wed, Jan 18, 2017 at 11:39:52AM -0800, Dmitry Torokhov wrote:
>>> On Wed, Jan 18, 2017 at 09:46:34AM -0800, Guenter Roeck wrote:
> []
>>>> diff --git a/drivers/input/misc/bfin_rotary.c b/drivers/input/misc/bfin_rotary.c
> []
>>>> @@ -141,25 +141,23 @@ static int bfin_rotary_probe(struct platform_device *pdev)
>>>>
>>>>  	/* Basic validation */
>>>>  	if ((pdata->rotary_up_key && !pdata->rotary_down_key) ||
>>>> -	    (!pdata->rotary_up_key && pdata->rotary_down_key)) {
>>>> +	    (!pdata->rotary_up_key && pdata->rotary_down_key))
>
> maybe just use ^
>
> 	if (!pdata->rotary_up_key ^ !pdata->rotary_down_key)
>
Interesting use case for a coccinelle rule.

To address the coccinelle related problem, I modified the rule to only apply
if the expression is in one line, and if the return statement is in the next
line. That works pretty well.

Guenter