On 11/10/21 2:24 pm, Fabio M. De Francesco wrote:
> On Sunday, October 10, 2021 7:06:05 AM CEST Saurav Girepunje wrote:
>> Remove the unneeded and redundant check of variable on goto out.
>> Simplify the return using multiple goto label to avoid
>> unneeded check.
>>
>> Signed-off-by: Saurav Girepunje <saurav.girepunje@xxxxxxxxx>
>> ---
>>
>> ChangeLog V2:
>> -Add goto out after the memcpy for no error case return with
>> ret only. Free is not required on no error case.
>
> Please write versions logs that reflect clearly and unequivocally what you
> changed between revisions and why. Subjects, Commit messages (Changelogs),
> and Versions logs are the "specifics" of your work. There must be no
> inconsistencies between these and the code or the history of the changes of
> the code.
>
> You may think that I'm pedantic, but since I acked your patch, I don't want
> to be misunderstood to be a promoter of approximate or clearly incorrect
> messages> "Free is not required on no error case" conveys the message that you have
> changed something that is not required but that is still potentially allowed.
>
> This is not the case because the problem that you fix with v2 is _not_
> something that is merely not required and unnecessary. You have fixed a bug
> that is introduced in v1. Introducing bugs is not allowed. If you do
> something that is not allowed you cannot simply say that it is not required.
>
My intension was to mention changes done on V2 with respect to V1.
I will try to be more clear on changelog messages.
>>
>> ChangeLog V1:
>> -Remove the unneeded and redundant check of variable on
>> goto out.
>> -Simplify the return using multiple goto label to avoid
>> unneeded check.
>>
>> .../staging/rtl8723bs/os_dep/ioctl_cfg80211.c | 22 +++++++++----------
>> 1 file changed, 10 insertions(+), 12 deletions(-)
>>
>> diff --git a/drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c b/drivers/
> staging/rtl8723bs/os_dep/ioctl_cfg80211.c
>> index 0868f56e2979..ae9579dc0848 100644
>> --- a/drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c
>> +++ b/drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c
>> @@ -2312,7 +2312,7 @@ static int rtw_cfg80211_add_monitor_if(struct adapter
> *padapter, char *name, str
>> mon_wdev = rtw_zmalloc(sizeof(struct wireless_dev));
>> if (!mon_wdev) {
>> ret = -ENOMEM;
>> - goto out;
>> + goto err_zmalloc;
>> }
>>
>> mon_wdev->wiphy = padapter->rtw_wdev->wiphy;
>> @@ -2322,23 +2322,21 @@ static int rtw_cfg80211_add_monitor_if(struct
> adapter *padapter, char *name, str
>>
>> ret = cfg80211_register_netdevice(mon_ndev);
>> if (ret) {
>> - goto out;
>> + goto err_register;
>> }
>>
>> *ndev = pwdev_priv->pmon_ndev = mon_ndev;
>> memcpy(pwdev_priv->ifname_mon, name, IFNAMSIZ+1);
>> + goto out;
>>
>> -out:
>> - if (ret && mon_wdev) {
>> - kfree(mon_wdev);
>> - mon_wdev = NULL;
>> - }
>> -
>> - if (ret && mon_ndev) {
>> - free_netdev(mon_ndev);
>> - *ndev = mon_ndev = NULL;
>> - }
>> +err_register:
>> + kfree(mon_wdev);
>> + mon_wdev = NULL;
>
> Probably you have already read a message by Greg Kroah-Hartman that confirms
> what I wrote in another message: "There is no need to set a local variable
> like this to NULL.".
>
Yes, Agree this is another improvement possible on this function.
> So please submit a v3. With the two changes requested above, my "acked-by"
> tag is confirmed again.
>
> Thanks,
>
> Fabio
>
I will submit a v3.
>>
>> +err_zmalloc:
>> + free_netdev(mon_ndev);
>> + *ndev = mon_ndev = NULL;
>> +out:
>> return ret;
>> }
>>
>> --
>> 2.32.0
>>
>>
>>
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>
