linux-kernel - Re: [PATCH 2/11] cw1200: Remove useless return variables

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Date:	Sat, 31 May 2014 13:14:29 -0300
From:	Peter Senna Tschudin <peter.senna@...il.com>
To:	walter harms <wharms@....de>
Cc:	Solomon Peachy <pizza@...ftnet.org>,
	kernel-janitors@...r.kernel.org,
	"John W. Linville" <linville@...driver.com>,
	linux-wireless@...r.kernel.org, netdev <netdev@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/11] cw1200: Remove useless return variables

On Sat, May 31, 2014 at 12:17 PM, walter harms <wharms@....de> wrote:
>
>
> Am 31.05.2014 15:14, schrieb Peter Senna Tschudin:
>> This patch remove variables that are initialized with a constant,
>> are never updated, and are only used as parameter of return.
>> Return the constant instead of using a variable.
>>
>> Verified by compilation only.
>>
>> The coccinelle script that find and fixes this issue is:
>> // <smpl>
>> @@
>> type T;
>> constant C;
>> identifier ret;
>> @@
>> - T ret = C;
>> ... when != ret
>>     when strict
>> return
>> - ret
>> + C
>> ;
>> // </smpl>
>>
>> Signed-off-by: Peter Senna Tschudin <peter.senna@...il.com>
>>
>> ---
>>  drivers/net/wireless/cw1200/sta.c |   19 +------------------
>>  1 file changed, 1 insertion(+), 18 deletions(-)
>>
>> diff --git a/drivers/net/wireless/cw1200/sta.c b/drivers/net/wireless/cw1200/sta.c
>> index cd0cad7..622370c 100644
>> --- a/drivers/net/wireless/cw1200/sta.c
>> +++ b/drivers/net/wireless/cw1200/sta.c
>> @@ -2289,24 +2289,7 @@ static int cw1200_upload_null(struct cw1200_common *priv)
>>
>>  static int cw1200_upload_qosnull(struct cw1200_common *priv)
>>  {
>> -     int ret = 0;
>> -     /* TODO:  This needs to be implemented
>> -
>> -     struct wsm_template_frame frame = {
>> -             .frame_type = WSM_FRAME_TYPE_QOS_NULL,
>> -             .rate = 0xFF,
>> -     };
>> -
>> -     frame.skb = ieee80211_qosnullfunc_get(priv->hw, priv->vif);
>> -     if (!frame.skb)
>> -             return -ENOMEM;
>> -
>> -     ret = wsm_set_template_frame(priv, &frame);
>> -
>> -     dev_kfree_skb(frame.skb);
>> -
>> -     */
>> -     return ret;
>> +     return 0;
>>  }
>>
>>  static int cw1200_enable_beaconing(struct cw1200_common *priv,
>
>
> are you sure you want to remove the entire function ?
Removing the comments was my fault. Sent V2 keeping the comments.

>
> re,
>  wh
>
>>
>> --
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>>



-- 
Peter
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