linux-kernel - Re: [PATCH] rtlwifi: rtl8821ae: add in a missing break in switch statement

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Date:   Sat, 6 Oct 2018 17:00:25 -0500
From:   Larry Finger <Larry.Finger@...inger.net>
To:     Joe Perches <joe@...ches.com>, Kalle Valo <kvalo@...eaurora.org>,
        Colin King <colin.king@...onical.com>
Cc:     Ping-Ke Shih <pkshih@...ltek.com>,
        "David S . Miller" <davem@...emloft.net>,
        Tsang-Shian Lin <thlin@...ltek.com>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] rtlwifi: rtl8821ae: add in a missing break in switch
 statement

On 10/6/18 3:17 PM, Joe Perches wrote:
> On Sat, 2018-10-06 at 15:05 -0500, Larry Finger wrote:
>> On 10/6/18 2:30 PM, Kalle Valo wrote:
>>> Colin King <colin.king@...onical.com> writes:
>>>
>>>> From: Colin Ian King <colin.king@...onical.com>
>>>>
>>>> The switch case RATR_INX_WIRELESS_MC has a missing break, this seems
>>>> to be unintentional as the setting of variable ret gets overwritten
>>>> when the case falls through to the following RATR_INX_WIRELESS_AC_5N
>>>> case.  Fix this by adding in the missing break.
>>>>
>>>> Detected by CoverityScan, CID#1167237 ("Missing break in switch")
>>>>
>>>> Fixes: 3c05bedb5fef ("Staging: rtl8812ae: Add Realtek 8821 PCI WIFI driver")
>>>> Signed-off-by: Colin Ian King <colin.king@...onical.com>
>>>> ---
>>>>    drivers/net/wireless/realtek/rtlwifi/rtl8821ae/hw.c | 1 +
>>>
>>> Is the fixes line correct? This patch is not for staging.
>>
>> No, the correct fixes commit is 21e4b0726dc67 (" rtlwifi: rtl8821ae: Move driver
>> from staging to regular tree").
>>
>> This driver was initially placed in staging as it was needed for a special
>> project, which is the commit that Colin used. As the patch subject states, the
>> driver was later moved to the regular wireless tree.
>>
>> That break is required, thus ACKed-by: Larry Finger <Larry.Finger@...inger.net>
> 
> Why not remove this entirely and use the generic routine in
> drivers/net/wireless/realtek/rtlwifi/base.c?
> 
> Is there a real difference?

I did not see any difference other than the removal of a bunch of magic numbers 
and better formatting.

Larry