linux-kernel - Re: [PATCH v2 05/12] software_node: unregister software

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Message-ID: <9fbd8234-6cc3-ac3c-7273-854e965a4794@gmail.com>
Date:   Wed, 23 Dec 2020 22:24:03 +0000
From:   Daniel Scally <djrscally@...il.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>
Cc:     linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org,
        linux-media@...r.kernel.org, devel@...ica.org, rjw@...ysocki.net,
        lenb@...nel.org, gregkh@...uxfoundation.org, yong.zhi@...el.com,
        bingbu.cao@...el.com, tian.shu.qiu@...el.com, mchehab@...nel.org,
        robert.moore@...el.com, erik.kaneda@...el.com, pmladek@...e.com,
        rostedt@...dmis.org, sergey.senozhatsky@...il.com,
        linux@...musvillemoes.dk,
        laurent.pinchart+renesas@...asonboard.com,
        jacopo+renesas@...ndi.org, kieran.bingham+renesas@...asonboard.com,
        linus.walleij@...aro.org, heikki.krogerus@...ux.intel.com,
        kitakar@...il.com, jorhand@...ux.microsoft.com,
        kernel test robot <lkp@...el.com>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>
Subject: Re: [PATCH v2 05/12] software_node: unregister software_nodes in
 reverse order

On 21/12/2020 11:26, Andy Shevchenko wrote:
> On Mon, Dec 21, 2020 at 11:21:16AM +0200, Sakari Ailus wrote:
>> On Thu, Dec 17, 2020 at 11:43:30PM +0000, Daniel Scally wrote:
>>> To maintain consistency with software_node_unregister_nodes(), reverse
>>> the order in which the software_node_unregister_node_group() function
>>> unregisters nodes.
> 
> ...
> 
>>>  void software_node_unregister_node_group(const struct software_node **node_group)
>>>  {
>>> -	unsigned int i;
>>> +	unsigned int i = 0;
>>>  
>>>  	if (!node_group)
>>>  		return;
>>>  
>>> -	for (i = 0; node_group[i]; i++)
>>> +	while (node_group[i]->name)
>>
>> Why is this change made? node_group is a NULL-terminated array, and the
>> above accesses the name pointer on each entry before checking the entry is
>> non-NULL. Or do I miss something here?
> 
> I believe it's a copy'n'paste typo.

Careless copy and paste yeah, my bad. I was doing it for consistency but
really should've just changed the ordering; I'll just drop that part.