netdev - Re:Re: Re: [PATCH] usb/peak

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Date:   Wed, 11 May 2022 16:46:37 +0800 (CST)
From:   z <zhaojunkui2008@....com>
To:     "Vincent MAILHOL" <mailhol.vincent@...adoo.fr>
Cc:     "Marc Kleine-Budde" <mkl@...gutronix.de>,
        "Wolfgang Grandegger" <wg@...ndegger.com>,
        "David S. Miller" <davem@...emloft.net>,
        "Jakub Kicinski" <kuba@...nel.org>,
        "Paolo Abeni" <pabeni@...hat.com>,
        Stefan Mätje <stefan.maetje@....eu>,
        linux-can@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, bernard@...o.com
Subject: Re:Re: Re: [PATCH] usb/peak_usb: cleanup code


At 2022-05-11 16:28:26, "Vincent MAILHOL" <mailhol.vincent@...adoo.fr> wrote:
>On Wed. 11 May 2022 at 16:11, z <zhaojunkui2008@....com> wrote:
>> At 2022-05-11 14:44:50, "Marc Kleine-Budde" <mkl@...gutronix.de> wrote:
>> >On 10.05.2022 23:38:38, Bernard Zhao wrote:
>> >> The variable fi and bi only used in branch if (!dev->prev_siblings)
>> >> , fi & bi not kmalloc in else branch, so move kfree into branch
>> >> if (!dev->prev_siblings),this change is to cleanup the code a bit.
>> >
>> >Please move the variable declaration into that scope, too. Adjust the
>> >error handling accordingly.
>>
>> Hi Marc:
>>
>> I am not sure if there is some gap.
>> If we move the variable declaration into that scope, then each error branch has to do the kfree job, like:
>> if (err) {
>>                         dev_err(dev->netdev->dev.parent,
>>                                 "unable to read %s firmware info (err %d)\n",
>>                                 pcan_usb_pro.name, err);
>>                         kfree(bi);
>>                         kfree(fi);
>>                         kfree(usb_if);
>>
>>                        return err;
>>                 }
>> I am not sure if this looks a little less clear?
>> Thanks!
>
>A cleaner way would be to move all the content of the if
>(!dev->prev_siblings) to a new function.

Hi Vincent Mailhol:

Got it.
This seems to be a good idea, i would resubmit one patch V2.
Thanks!

BR//Bernard
>
>Yours sincerely,
>Vincent Mailhol