linux-kernel - Re: [PATCH] net: microchip: sparx5: Fix missing destroy_workqueue of mact

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Message-ID: <52a15a3f-a288-7a7f-e9b3-1096d108e4a3@huawei.com>
Date:   Fri, 2 Dec 2022 18:34:58 +0800
From:   Qiheng Lin <linqiheng@...wei.com>
To:     Pavan Chebbi <pavan.chebbi@...adcom.com>
CC:     <davem@...emloft.net>, <edumazet@...gle.com>, <kuba@...nel.org>,
        <pabeni@...hat.com>, <lars.povlsen@...rochip.com>,
        <Steen.Hegelund@...rochip.com>, <daniel.machon@...rochip.com>,
        <UNGLinuxDriver@...rochip.com>, <netdev@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] net: microchip: sparx5: Fix missing destroy_workqueue of
 mact_queue

在 2022/12/2 18:02, Pavan Chebbi 写道:
> On Fri, Dec 2, 2022 at 1:36 PM Pavan Chebbi <pavan.chebbi@...adcom.com> wrote:
>>
>> On Thu, Dec 1, 2022 at 6:57 PM Qiheng Lin <linqiheng@...wei.com> wrote:
>>>
>>> The mchp_sparx5_probe() won't destroy workqueue created by
>>> create_singlethread_workqueue() in sparx5_start() when later
>>> inits failed. Add destroy_workqueue in the cleanup_ports case,
>>> also add it in mchp_sparx5_remove()
>>>
>>> Signed-off-by: Qiheng Lin <linqiheng@...wei.com>
>>> ---
>>>   drivers/net/ethernet/microchip/sparx5/sparx5_main.c | 3 +++
>>>   1 file changed, 3 insertions(+)
>>>
>>> diff --git a/drivers/net/ethernet/microchip/sparx5/sparx5_main.c b/drivers/net/ethernet/microchip/sparx5/sparx5_main.c
>>> index eeac04b84638..b6bbb3c9bd7a 100644
>>> --- a/drivers/net/ethernet/microchip/sparx5/sparx5_main.c
>>> +++ b/drivers/net/ethernet/microchip/sparx5/sparx5_main.c
>>> @@ -887,6 +887,8 @@ static int mchp_sparx5_probe(struct platform_device *pdev)
>>>
>>>   cleanup_ports:
>>>          sparx5_cleanup_ports(sparx5);
>>> +       if (sparx5->mact_queue)
>>> +               destroy_workqueue(sparx5->mact_queue);
>>
>> Would be better if you destroy inside sparx5_start() before returning failure.
>>
> 
> Alternatively you could add the destroy inside sparx5_cleanup_ports()
> that will cover all error exits?

That works functionally, I have considered this modification as well. 
Since I'm not quite sure on the naming, destroying the mact_queue 
belongs to sparx5_cleanup_ports, which they don't contain now.

> 
>>>   cleanup_config:
>>>          kfree(configs);
>>>   cleanup_pnode:
>>> @@ -911,6 +913,7 @@ static int mchp_sparx5_remove(struct platform_device *pdev)
>>>          sparx5_cleanup_ports(sparx5);
>>>          /* Unregister netdevs */
>>>          sparx5_unregister_notifier_blocks(sparx5);
>>> +       destroy_workqueue(sparx5->mact_queue);
>>>
>>>          return 0;
>>>   }
>>> --
>>> 2.32.0
>>>