linux-kernel - Re: [PATCH 4/5] drivers/video/msm/mddi_client_dummy.c: use devm

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20120809175712.GA24215@codeaurora.org>
Date:	Thu, 9 Aug 2012 10:57:12 -0700
From:	David Brown <davidb@...eaurora.org>
To:	Damien Cassou <damien.cassou@...l.fr>
Cc:	kernel-janitors@...r.kernel.org,
	Daniel Walker <dwalker@...o99.com>,
	Bryan Huntsman <bryanh@...eaurora.org>,
	Florian Tobias Schandinat <FlorianSchandinat@....de>,
	linux-arm-msm@...r.kernel.org, linux-fbdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/5] drivers/video/msm/mddi_client_dummy.c: use devm_
 functions

On Fri, Aug 03, 2012 at 05:40:14PM +0200, Damien Cassou wrote:
> From: Damien Cassou <damien.cassou@...l.fr>
> 
> The various devm_ functions allocate memory that is released when a driver
> detaches. This patch replaces the use of kzalloc by devm_kzalloc.
> 
> Signed-off-by: Damien Cassou <damien.cassou@...l.fr>
> 
> ---
>  drivers/video/msm/mddi_client_dummy.c |   12 ++----------
>  1 file changed, 2 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/video/msm/mddi_client_dummy.c b/drivers/video/msm/mddi_client_dummy.c
> index d2a091c..4c31325 100644
> --- a/drivers/video/msm/mddi_client_dummy.c
> +++ b/drivers/video/msm/mddi_client_dummy.c
> @@ -51,7 +51,7 @@ static int mddi_dummy_probe(struct platform_device *pdev)
>  {
>  	struct msm_mddi_client_data *client_data = pdev->dev.platform_data;
>  	struct panel_info *panel =
> -		kzalloc(sizeof(struct panel_info), GFP_KERNEL);
> +		devm_kzalloc(&pdev->dev, sizeof(struct panel_info), GFP_KERNEL);
>  	int ret;
>  	if (!panel)
>  		return -ENOMEM;
> @@ -67,18 +67,11 @@ static int mddi_dummy_probe(struct platform_device *pdev)
>  				      client_data->fb_resource, 1);
>  	panel->panel_data.fb_data = client_data->private_client_data;
>  	panel->pdev.dev.platform_data = &panel->panel_data;
> -	ret = platform_device_register(&panel->pdev);
> -	if (ret) {
> -		kfree(panel);
> -		return ret;
> -	}
> -	return 0;
> +	return platform_device_register(&panel->pdev);

Removing this block causes a warning:
kernel/drivers/video/msm/mddi_client_dummy.c: In function 'mddi_dummy_probe':
kernel/drivers/video/msm/mddi_client_dummy.c:55:6: warning: unused variable 'ret' [-Wunused-variable]

Please remove the 'int ret;' line above as well.

Thanks,
David Brown

-- 
Sent by an employee of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/