linux-kernel - Re: [PATCH] rtlwifi: remove redundant initialization of variable ul

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Message-ID: <87pmo6dbdq.fsf@kernel.org>
Date:   Tue, 01 Feb 2022 14:22:57 +0200
From:   Kalle Valo <kvalo@...nel.org>
To:     Pkshih <pkshih@...ltek.com>
Cc:     "linux-wireless\@vger.kernel.org" <linux-wireless@...r.kernel.org>,
        "colin.i.king\@gmail.com" <colin.i.king@...il.com>,
        "davem\@davemloft.net" <davem@...emloft.net>,
        "kuba\@kernel.org" <kuba@...nel.org>,
        "netdev\@vger.kernel.org" <netdev@...r.kernel.org>,
        "kernel-janitors\@vger.kernel.org" <kernel-janitors@...r.kernel.org>,
        "linux-kernel\@vger.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] rtlwifi: remove redundant initialization of variable ul_encalgo

Pkshih <pkshih@...ltek.com> writes:

> On Sun, 2022-01-30 at 22:37 +0000, Colin Ian King wrote:
>> Variable ul_encalgo is initialized with a value that is never read,
>> it is being re-assigned a new value in every case in the following
>> switch statement. The initialization is redundant and can be removed.
>> 
>> Signed-off-by: Colin Ian King <colin.i.king@...il.com>
>
> Acked-by: Ping-Ke Shih <pkshih@...ltek.com>
>
>> ---
>>  drivers/net/wireless/realtek/rtlwifi/cam.c | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>> 
>> diff --git a/drivers/net/wireless/realtek/rtlwifi/cam.c
>> b/drivers/net/wireless/realtek/rtlwifi/cam.c
>> index 7a0355dc6bab..32970ea4b4e7 100644
>> --- a/drivers/net/wireless/realtek/rtlwifi/cam.c
>> +++ b/drivers/net/wireless/realtek/rtlwifi/cam.c
>> @@ -208,7 +208,7 @@ void rtl_cam_empty_entry(struct ieee80211_hw *hw, u8 uc_index)
>>  
>>  	u32 ul_command;
>>  	u32 ul_content;
>> -	u32 ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_AES];
>> +	u32 ul_encalgo;
>>  	u8 entry_i;
>>  
>>  	switch (rtlpriv->sec.pairwise_enc_algorithm) {
>> -- 
>
> When I check this patch, I find there is no 'break' for default case.
> Do we need one? like
>
> @@ -226,6 +226,7 @@ void rtl_cam_empty_entry(struct ieee80211_hw *hw, u8 uc_index)
>                 break;
>         default:
>                 ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_AES];
> +               break;
>         }
>  
>         for (entry_i = 0; entry_i < CAM_CONTENT_COUNT; entry_i++) {

Yeah, it would be good to have break for consistency. Can someone send a
separate patch for that?

-- 
https://patchwork.kernel.org/project/linux-wireless/list/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches