linux-kernel - Re: [PATCH] drivers: video: omap2: dss: Use PTR

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Message-ID: <5149FB1A.2030608@ti.com>
Date:	Wed, 20 Mar 2013 13:08:26 -0500
From:	Jon Hunter <jon-hunter@...com>
To:	Tomi Valkeinen <tomi.valkeinen@...com>
CC:	Alexandru Gheorghiu <gheorghiuandru@...il.com>,
	Florian Tobias Schandinat <FlorianSchandinat@....de>,
	<linux-omap@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] drivers: video: omap2: dss: Use PTR_RET function


On 03/20/2013 01:02 PM, Jon Hunter wrote:
> 
> On 03/20/2013 11:59 AM, Tomi Valkeinen wrote:
>> On 2013-03-20 17:44, Jon Hunter wrote:
>>>
>>> On 03/20/2013 06:56 AM, Tomi Valkeinen wrote:
>>>> On 2013-03-19 10:03, Alexandru Gheorghiu wrote:
>>>>> Use PTR_RET function instead of IS_ERR and PTR_ERR.
>>>>> Patch found using coccinelle.
>>>>>
>>>>> Signed-off-by: Alexandru Gheorghiu <gheorghiuandru@...il.com>
>>>>> ---
>>>>>  drivers/video/omap2/dss/core.c |    5 +----
>>>>>  1 file changed, 1 insertion(+), 4 deletions(-)
>>>>>
>>>>> diff --git a/drivers/video/omap2/dss/core.c b/drivers/video/omap2/dss/core.c
>>>>> index f8779d4..60cc6fe 100644
>>>>> --- a/drivers/video/omap2/dss/core.c
>>>>> +++ b/drivers/video/omap2/dss/core.c
>>>>> @@ -181,10 +181,7 @@ int dss_debugfs_create_file(const char *name, void (*write)(struct seq_file *))
>>>>>  	d = debugfs_create_file(name, S_IRUGO, dss_debugfs_dir,
>>>>>  			write, &dss_debug_fops);
>>>>>  
>>>>> -	if (IS_ERR(d))
>>>>> -		return PTR_ERR(d);
>>>>> -
>>>>> -	return 0;
>>>>> +	return PTR_RET(d);
>>>>>  }
>>>>>  #else /* CONFIG_OMAP2_DSS_DEBUGFS */
>>>>>  static inline int dss_initialize_debugfs(void)
>>>>>
>>>>
>>>> Thanks. I'll apply to omapdss tree.
>>>
>>> Is this correct? If debugfs_create_file() returns a valid pointer, then
>>> now dss_debugfs_create_file() will return a non-zero value on success. I
>>> don't think this is what you want. A similar case came up recently here [1].
>>
>> Hmm. I don't follow. And I don't understand the post where you referred.

Yes looking at Russell's response I am not sure I following now as it is
also using PTR_RET() and not PTR_ERR(). My eyes deceived me on this one.

Jon
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