netdev - Re: [PATCH net-next, 2/4] hv_netvsc: Fix error handling in netvsc

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Date:   Fri, 1 Nov 2019 21:42:41 +0100
From:   Markus Elfring <Markus.Elfring@....de>
To:     Haiyang Zhang <haiyangz@...rosoft.com>,
        linux-hyperv@...r.kernel.org, netdev@...r.kernel.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org,
        "David S. Miller" <davem@...emloft.net>,
        "K. Y. Srinivasan" <kys@...rosoft.com>,
        Olaf Hering <olaf@...fle.de>, Sasha Levin <sashal@...nel.org>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>
Subject: Re: [PATCH net-next, 2/4] hv_netvsc: Fix error handling in
 netvsc_attach()

> If rndis_filter_open() fails, we need to remove the rndis device created
> in earlier steps, before returning an error code. Otherwise, the retry of
> netvsc_attach() from its callers will fail and hang.

How do you think about to choose a more “imperative mood” for your
change description?
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/submitting-patches.rst?id=0dbe6cb8f7e05bc9611602ef45980a6c57b245a3#n151

…
> +++ b/drivers/net/hyperv/netvsc_drv.c
> @@ -982,7 +982,7 @@ static int netvsc_attach(struct net_device *ndev,
>  	if (netif_running(ndev)) {
>  		ret = rndis_filter_open(nvdev);
>  		if (ret)
> -			return ret;
> +			goto err;
>
>  		rdev = nvdev->extension;
>  		if (!rdev->link_state)
…

I would prefer to specify the completed exception handling
(addition of two function calls) by a compound statement in
the shown if branch directly.

If you would insist to use a goto statement, I find an other label
more appropriate according to the Linux coding style.

Regards,
Markus