linux-kernel - Re: [PATCH net] devlink: Add missing genlmsg_cancel() in devlink_nl_sb_port_pool

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Date:   Fri, 13 Nov 2020 19:59:56 +0800
From:   "wanghai (M)" <wanghai38@...wei.com>
To:     Jakub Kicinski <kuba@...nel.org>
CC:     <jiri@...dia.com>, <davem@...emloft.net>, <idosch@...lanox.com>,
        <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH net] devlink: Add missing genlmsg_cancel() in
 devlink_nl_sb_port_pool_fill()


在 2020/11/13 1:51, Jakub Kicinski 写道:
> On Wed, 11 Nov 2020 21:58:53 +0800 Wang Hai wrote:
>> If sb_occ_port_pool_get() failed in devlink_nl_sb_port_pool_fill(),
>> msg should be canceled by genlmsg_cancel().
>> +++ b/net/core/devlink.c
>> @@ -1447,8 +1447,10 @@ static int devlink_nl_sb_port_pool_fill(struct sk_buff *msg,
[...]
>>   			return err;
> I guess the driver would have to return -EMSGSIZE for this to matter,
> which is quite unlikely but we should indeed fix.
>
> Still, returning in the middle of the function with an epilogue is what
> got use here in the first place, so please use a goto. E.g. like this:
>
[...]
>   static int devlink_nl_cmd_sb_port_pool_get_doit(struct sk_buff *skb,
>
> .

Thanks for your review,  I just sent v2

[PATCH v2 net] devlink: Add missing genlmsg_cancel() in 
devlink_nl_sb_port_pool_fill()