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Subject: Re: [PATCH] wireless: remove unneeded break
To:     Joe Perches <joe@perches.com>,
        Christian Lamparter <chunkeey@gmail.com>, trix@redhat.com,
        kvalo@codeaurora.org, davem@davemloft.net, kuba@kernel.org,
        mcoquelin.stm32@gmail.com, alexandre.torgue@st.com,
        ath9k-devel@qca.qualcomm.com, johannes.berg@intel.com,
        emmanuel.grumbach@intel.com, luciano.coelho@intel.com,
        linuxwifi@intel.com, chunkeey@googlemail.com, pkshih@realtek.com,
        sara.sharon@intel.com, tova.mussai@intel.com,
        nathan.errera@intel.com, lior2.cohen@intel.com, john@phrozen.org,
        shaul.triebitz@intel.com, shahar.s.matityahu@intel.com,
        Larry.Finger@lwfinger.net, zhengbin13@huawei.com,
        christophe.jaillet@wanadoo.fr, yanaijie@huawei.com,
        saurav.girepunje@gmail.com
Cc:     ath10k@lists.infradead.org, linux-wireless@vger.kernel.org,
        netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-stm32@st-md-mailman.stormreply.com,
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References: <20201019150507.20574-1-trix@redhat.com>
 <b31478ea-979a-1c9c-65db-32325233a715@gmail.com>
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From:   "Gustavo A. R. Silva" <gustavo@embeddedor.com>
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Message-ID: <fb38b96a-b666-1a6d-211d-b79278a8d878@embeddedor.com>
Date:   Mon, 19 Oct 2020 10:54:29 -0500
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On 10/19/20 10:21, Joe Perches wrote:
> On Mon, 2020-10-19 at 17:14 +0200, Christian Lamparter wrote:
>> On 19/10/2020 17:05, trix@redhat.com wrote:
>>> From: Tom Rix <trix@redhat.com>
>>>
>>> A break is not needed if it is preceded by a return or goto
>>>
>>> Signed-off-by: Tom Rix <trix@redhat.com>
>>> diff --git a/drivers/net/wireless/intersil/p54/eeprom.c b/drivers/net/wireless/intersil/p54/eeprom.c
>>> index 5bd35c147e19..3ca9d26df174 100644
>>> --- a/drivers/net/wireless/intersil/p54/eeprom.c
>>> +++ b/drivers/net/wireless/intersil/p54/eeprom.c
>>> @@ -870,7 +870,6 @@ int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)
>>>   			} else {
>>>   				goto good_eeprom;
>>>   			}
>>> -			break;
>> Won't the compiler (gcc) now complain about a missing fallthrough annotation?

Clang would definitely complain about this.

>>>   		default:
>>>   			break;
>>>   		}
> 
> No, though the code would be clearer like:
> ---
> diff --git a/drivers/net/wireless/intersil/p54/eeprom.c b/drivers/net/wireless/intersil/p54/eeprom.c
> index 5bd35c147e19..233fa072d96d 100644
> --- a/drivers/net/wireless/intersil/p54/eeprom.c
> +++ b/drivers/net/wireless/intersil/p54/eeprom.c
> @@ -867,10 +867,8 @@ int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)
>  					 "test!\n");
>  				err = -ENOMSG;
>  				goto err;
> -			} else {
> -				goto good_eeprom;
>  			}
> -			break;
> +			goto good_eeprom;
>  		default:
>  			break;
>  		}
> 
> 

This is much better because it'd avoid any complain from Clang.

--
Gustavo