linux-kernel - Re: [PATCH v2] rtc: davinci: clean up probe/remove routines

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: <507AB1E6.4000809@ti.com>
Date:	Sun, 14 Oct 2012 18:06:54 +0530
From:	Sekhar Nori <nsekhar@...com>
To:	Hannu Heikkinen <hannuxx@....fi>
CC:	<linux-kernel@...r.kernel.org>, <rtc-linux@...glegroups.com>,
	<a.zummo@...ertech.it>,
	<davinci-linux-open-source@...ux.davincidsp.com>
Subject: Re: [PATCH v2] rtc: davinci: clean up probe/remove routines

On 10/14/2012 3:13 PM, Hannu Heikkinen wrote:
> Use the devres managed resource functions in the probe routine.
> Also affects the remove routine where the previously used free and
> release functions are not needed.
> 
> The devm_* functions eliminate the need for manual resource releasing and
> simplify error handling.  Resources allocated by devm_* are freed
> automatically on driver detach.
> 
> Signed-off-by: Hannu Heikkinen <hannuxx@....fi>
> ---
>  drivers/rtc/rtc-davinci.c | 56 +++++++++++++----------------------------------
>  1 file changed, 15 insertions(+), 41 deletions(-)
> 
> diff --git a/drivers/rtc/rtc-davinci.c b/drivers/rtc/rtc-davinci.c
> index 14c2109..d24b573 100644
> --- a/drivers/rtc/rtc-davinci.c
> +++ b/drivers/rtc/rtc-davinci.c
> @@ -119,8 +119,6 @@ static DEFINE_SPINLOCK(davinci_rtc_lock);
>  struct davinci_rtc {
>  	struct rtc_device 		*rtc;
>  	void __iomem			*base;
> -	resource_size_t			pbase;
> -	size_t				base_size;
>  	int				irq;
>  };
>  
> @@ -482,22 +480,16 @@ static int __init davinci_rtc_probe(struct platform_device *pdev)
>  {
>  	struct device *dev = &pdev->dev;
>  	struct davinci_rtc *davinci_rtc;
> -	struct resource *res, *mem;
> +	struct resource *res;
>  	int ret = 0;
>  
> -	davinci_rtc = kzalloc(sizeof(struct davinci_rtc), GFP_KERNEL);
> +	davinci_rtc = devm_kzalloc(&pdev->dev, sizeof(struct davinci_rtc),
> +		GFP_KERNEL);
>  	if (!davinci_rtc) {
>  		dev_dbg(dev, "could not allocate memory for private data\n");
>  		return -ENOMEM;
>  	}
>  
> -	davinci_rtc->irq = platform_get_irq(pdev, 0);
> -	if (davinci_rtc->irq < 0) {
> -		dev_err(dev, "no RTC irq\n");
> -		ret = davinci_rtc->irq;
> -		goto fail1;
> -	}
> -
>  	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>  	if (!res) {
>  		dev_err(dev, "no mem resource\n");
> @@ -505,23 +497,16 @@ static int __init davinci_rtc_probe(struct platform_device *pdev)
>  		goto fail1;

As mentioned last time, this will have a build break here because fail1
is being removed down below.

Thanks,
Sekhar
--
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/