linux-kernel - Re: [PATCH] media: saa7134 fix media_dev alloc error path to not free when alloc fails

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Date:	Thu, 14 Apr 2016 16:18:17 -0600
From:	Shuah Khan <shuah.kh@...sung.com>
To:	Mauro Carvalho Chehab <mchehab@....samsung.com>,
	Shuah Khan <shuahkh@....samsung.com>
Cc:	nenggun.kim@...sung.com, akpm@...ux-foundation.org,
	jh1009.sung@...sung.com, inki.dae@...sung.com, arnd@...db.de,
	linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] media: saa7134 fix media_dev alloc error path to not free
 when alloc fails

On 04/14/2016 03:08 PM, Mauro Carvalho Chehab wrote:
> Em Thu, 14 Apr 2016 10:31:20 -0600
> Shuah Khan <shuahkh@....samsung.com> escreveu:
> 
>> media_dev alloc error path does kfree when alloc fails. Fix it to not call
>> kfree when media_dev alloc fails.
> 
> No need. kfree(NULL) is OK.

Agreed.

> 
> Adding a label inside a conditional block is ugly.

In this case, if label is in normal path, we will see defined, but not
used warnings when condition isn't defined. We seem to have many such
cases for CONFIG_MEDIA_CONTROLLER :(

thanks,
-- Shuah


-- 
Shuah Khan
Sr. Linux Kernel Developer
Open Source Innovation Group
Samsung Research America(Silicon Valley)
shuah.kh@...sung.com | (970) 217-8978