linux-kernel - Re: [PATCH v2 1/6] ACPI: dock: clean up error handling paths in dock

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Date:	Thu, 15 Oct 2009 21:36:18 -0700
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	Alex Chiang <achiang@...com>
Cc:	lenb@...nel.org, shaohua.li@...el.com,
	linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org
Subject: Re: [PATCH v2 1/6] ACPI: dock: clean up error handling paths in
	dock_add()

Hi Alex,

On Wed, Oct 14, 2009 at 04:46:16PM -0600, Alex Chiang wrote:
> Remove some copy/paste code in our error handling paths, which makes
> the function smaller and slightly easier to read.

Changing individual attributes into attribute_group would greatly
simplify the code.

> 
> Signed-off-by: Alex Chiang <achiang@...com>
> ---
> 
>  drivers/acpi/dock.c |   75 +++++++++++++++++++--------------------------------
>  1 files changed, 28 insertions(+), 47 deletions(-)
> 
> diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c
> index 7338b6a..642c7dd 100644
> --- a/drivers/acpi/dock.c
> +++ b/drivers/acpi/dock.c
> @@ -968,11 +968,9 @@ static int dock_add(acpi_handle handle)
>  		platform_device_register_simple(dock_device_name,
>  			dock_station_count, NULL, 0);
>  	dock_device = dock_station->dock_device;
> -	if (IS_ERR(dock_device)) {
> -		kfree(dock_station);
> -		dock_station = NULL;
> -		return PTR_ERR(dock_device);
> -	}
> +	ret = IS_ERR(dock_device) ? PTR_ERR(dock_device) : 0;
> +	if (ret)
> +		goto out;

I think

	if (IS_ERR(dock_device)) {
		ret = PTR_ERR(dock_device);
		goto out;
	}

is more commonly used form.

Thanks.

-- 
Dmitry
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