linux-kernel - Re: [PATCH 4/8] eeepc-laptop: pull out eeepc_destroy

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Message-ID: <20141028051935.GF60814@vmdeb7>
Date:	Mon, 27 Oct 2014 22:19:35 -0700
From:	Darren Hart <dvhart@...radead.org>
To:	Frans Klaver <fransklaver@...il.com>
Cc:	Corentin Chary <corentin.chary@...il.com>,
	acpi4asus-user@...ts.sourceforge.net,
	platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/8] eeepc-laptop: pull out eeepc_destroy_rfkill

On Wed, Oct 22, 2014 at 09:12:39PM +0200, Frans Klaver wrote:
> In eeepc_rfkill_exit, we implement the same code four times. Pull out a
> function that cleans up an rfkill object to get rid of the duplication.
> 
> Signed-off-by: Frans Klaver <fransklaver@...il.com>
> ---
>  drivers/platform/x86/eeepc-laptop.c | 34 ++++++++++++++--------------------
>  1 file changed, 14 insertions(+), 20 deletions(-)
> 
> diff --git a/drivers/platform/x86/eeepc-laptop.c b/drivers/platform/x86/eeepc-laptop.c
> index e92ea41..73e8d39 100644
> --- a/drivers/platform/x86/eeepc-laptop.c
> +++ b/drivers/platform/x86/eeepc-laptop.c
> @@ -823,35 +823,29 @@ static char EEEPC_RFKILL_NODE_1[] = "\\_SB.PCI0.P0P5";
>  static char EEEPC_RFKILL_NODE_2[] = "\\_SB.PCI0.P0P6";
>  static char EEEPC_RFKILL_NODE_3[] = "\\_SB.PCI0.P0P7";
>  
> +static inline void eeepc_destroy_rfkill(struct rfkill **rfkill)
> +{
> +	if (!*rfkill)
> +		return;
> +	rfkill_unregister(*rfkill);
> +	rfkill_destroy(*rfkill);
> +	*rfkill = NULL;
> +}

In this case the savings is 6 lines at the cost of some legibility as double
pointers are arguably harder to read, and definitely easier to screw up ;-)

I appreciate the goal, but I'm not convinced it is worth it.

-- 
Darren Hart
Intel Open Source Technology Center
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