netdev - Re: [PATCH] staging: qlge: add unregister_netdev in qlge

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Date:   Mon, 21 Feb 2022 09:47:09 +0800
From:   Hangyu Hua <hbh25y@...il.com>
To:     Dan Carpenter <dan.carpenter@...cle.com>
Cc:     manishc@...vell.com, GR-Linux-NIC-Dev@...vell.com,
        coiby.xu@...il.com, gregkh@...uxfoundation.org,
        netdev@...r.kernel.org, linux-staging@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging: qlge: add unregister_netdev in qlge_probe

Thanks for your suggesion. I will resubmit later.

On 2022/2/18 20:03, Dan Carpenter wrote:
> On Fri, Feb 18, 2022 at 04:11:30PM +0800, Hangyu Hua wrote:
>> unregister_netdev need to be called when register_netdev succeeds
>> qlge_health_create_reporters fails.
>>
> 
> 1) Add a Fixes tag:
> 
> Fixes: d8827ae8e22b ("staging: qlge: deal with the case that devlink_health_reporter_create fails")
> 
>> Signed-off-by: Hangyu Hua <hbh25y@...il.com>
>> ---
>>   drivers/staging/qlge/qlge_main.c | 4 +++-
>>   1 file changed, 3 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/staging/qlge/qlge_main.c b/drivers/staging/qlge/qlge_main.c
>> index 9873bb2a9ee4..0a199c6d77a1 100644
>> --- a/drivers/staging/qlge/qlge_main.c
>> +++ b/drivers/staging/qlge/qlge_main.c
>> @@ -4611,8 +4611,10 @@ static int qlge_probe(struct pci_dev *pdev,
>>   	}
>>   
>>   	err = qlge_health_create_reporters(qdev);
>> -	if (err)
>> +	if (err) {
>> +		unregister_netdev(ndev);
>>   		goto netdev_free;
>> +	}
> 
> 2) Use a goto to unwind.  3) Release the other pdev stuff as well.
> 4)  Clean up the error handling for register_netdev() by using a goto
> as well.
> 
> 	err = register_netdev(ndev);
> 	if (err) {
> 		dev_err(&pdev->dev, "net device registration failed.\n");
> 		goto cleanup_pdev;
> 	}
> 
> 	err = qlge_health_create_reporters(qdev);
> 	if (err)
> 		goto unregister_netdev;
> 
> 	...
> 
> 	return 0;
> 
> unregister_netdev:
> 	unregister_netdev(ndev);
> cleanup_pdev:
> 	qlge_release_all(pdev);
> 	pci_disable_device(pdev);
> netdev_free:
> 	free_netdev(ndev);
> devlink_free:
> 	devlink_free(devlink);
> 
> 	return ret;
> 
> regards,
> dan carpenter
>