linux-kernel - Re: [PATCH v2 1/2] staging: rtl8712: Fix style issues in rtl871x

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Message-ID: <01183b3b-b8af-4451-8b52-e7acd0b4a9a5@gmail.com>
Date: Thu, 29 Aug 2024 20:59:55 +0200
From: Philipp Hortmann <philipp.g.hortmann@...il.com>
To: Manisha Singh <masingh.linux@...il.com>
Cc: florian.c.schilhabel@...glemail.com, gregkh@...uxfoundation.org,
 linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org,
 Dan Carpenter <dan.carpenter@...aro.org>
Subject: Re: [PATCH v2 1/2] staging: rtl8712: Fix style issues in rtl871x_io.c

On 8/29/24 11:36, Dan Carpenter wrote:
> On Wed, Aug 28, 2024 at 11:08:31PM +0200, Philipp Hortmann wrote:
>>> diff --git a/drivers/staging/rtl8712/rtl871x_io.c b/drivers/staging/rtl8712/rtl871x_io.c
>>> index 6789a4c98564..6311ac15c581 100644
>>> --- a/drivers/staging/rtl8712/rtl871x_io.c
>>> +++ b/drivers/staging/rtl8712/rtl871x_io.c
>>> @@ -48,10 +48,10 @@ static uint _init_intf_hdl(struct _adapter *padapter,
>>>    	set_intf_funs = &(r8712_usb_set_intf_funs);
>>>    	set_intf_ops = &r8712_usb_set_intf_ops;
>>>    	init_intf_priv = &r8712_usb_init_intf_priv;
>>> -	pintf_priv = pintf_hdl->pintfpriv = kmalloc(sizeof(struct intf_priv),
>>> -						    GFP_ATOMIC);
>>> +	pintf_priv = kmalloc(sizeof(struct intf_priv), GFP_ATOMIC);
>>>    	if (!pintf_priv)
>>>    		goto _init_intf_hdl_fail;
>>
>> By pushing the below statement after the "if (!pintf_priv)" you change the
>> logic. Is this really wanted? Why do you think it is better? I would avoid
>> this and it would be a separate patch anyhow.
>>
>>> +	pintf_hdl->pintfpriv = pintf_priv;
> 
> I liked moving it.  And I feel like it should be done in this patch, not as a
> separate patch.  But it should have some justification as you say.  The commit
> message could say something like:
> 
>      Checkpatch complains that we should avoid multiple assignments on the same
>      line for readability purposes.  Generally, we would allocate, check and then
>      assign.  It doesn't matter what is assigned to "pintf_hdl->pintfpriv" on the
>      error path.  For example, on subsequent error paths "pintf_hdl->pintfpriv"
>      is a freed pointer.  So this code is okay as-is and it's also okay to move
>      the pintf_hdl->pintfpriv = pintf_priv assignment after the NULL check.
> 
> (Notice how I sold this as one thing, moving the "pintf_hdl->pintfpriv"
> assignment, not silencing checkpatch and then moving it.  Notice how I avoided
> using the word "also".)
> 
> regards,
> dan carpenter
> 

Hi Manisha,

I like to give you an order of importance.
Greg is the maintainer. You need to fullfill his requirements as it is 
his decision to accept or reject your patches.

Dan is a very experienced developer. You are well advised to listen to him.

I am only a part time Hobbyist. I try to support Greg and Dan by 
responding to patches. Typically they will correct me when I am wrong.

Bye Philipp