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From:   Jiasheng Jiang <jiasheng@iscas.ac.cn>
To:     gregkh@linuxfoundation.org
Cc:     hdegoede@redhat.com, arnd@arndb.de, linux-kernel@vger.kernel.org,
        Jiasheng Jiang <jiasheng@iscas.ac.cn>
Subject: Re: Re: [PATCH v2 1/2] virt: vbox: Add check for device_create_file
Date:   Thu,  1 Sep 2022 18:16:49 +0800
Message-Id: <20220901101649.3499848-1-jiasheng@iscas.ac.cn>
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On Thu, Sep 01, 2022 at 05:39:46PM +0800, Greg KH wrote:
>> -	device_create_file(dev, &dev_attr_host_version);
>> -	device_create_file(dev, &dev_attr_host_features);
>> +
>> +	ret = device_create_file(gdev->dev, &dev_attr_host_features);
>> +	if (ret)
>> +		goto err_unregister_misc_device_user;
>> +	ret = device_create_file(gdev->dev, &dev_attr_host_version);
>> +	if (ret)
>> +		goto err_remove_file_features;
>>  
>>  	vbg_info("vboxguest: misc device minor %d, IRQ %d, I/O port %x, MMIO at %pap (size %pap)\n",
>>  		 gdev->misc_device.minor, pci->irq, gdev->io_port,
>> @@ -399,6 +404,8 @@ static int vbg_pci_probe(struct pci_dev *pci, const struct pci_device_id *id)
>>  
>>  	return 0;
>>  
>> +err_remove_file_features:
>> +	device_remove_file(gdev->dev, &dev_attr_host_features);
> Please make a patch series that is linked together, the one you just did
> was not properly threaded at all (hint, use git send-email).
> 
> And again, this is not the correct way to solve this issue, use a
> default attribute group for the driver instead.  No driver should ever
> be adding or removing files individually like this.

Need I use the group to replace the individually removal in
vbg_pci_remove() too?

Thanks,
Jiang