linux-kernel - Re: [PATCH V5 1/3] of: dynamic: Add interfaces for creating device node dynamically

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <f8d5d5a9-6d3c-8b1d-797b-a96c3580dc61@amd.com>
Date:   Tue, 3 Jan 2023 10:34:18 -0800
From:   Lizhi Hou <lizhi.hou@....com>
To:     Clément Léger <clement.leger@...tlin.com>
CC:     <linux-pci@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <robh@...nel.org>,
        <frowand.list@...il.com>, <helgaas@...nel.org>, <max.zhen@....com>,
        <sonal.santan@....com>, <larry.liu@....com>, <brian.xu@....com>,
        <stefano.stabellini@...inx.com>, <trix@...hat.com>,
        "Allan.Nielsen@...rochip.com" <Allan.Nielsen@...rochip.com>,
        "Horatiu.Vultur@...rochip.com" <Horatiu.Vultur@...rochip.com>,
        "Steen.Hegelund@...rochip.com" <Steen.Hegelund@...rochip.com>
Subject: Re: [PATCH V5 1/3] of: dynamic: Add interfaces for creating device
 node dynamically


On 1/2/23 05:50, Clément Léger wrote:
> Le Thu, 15 Dec 2022 09:30:44 -0800,
> Lizhi Hou <lizhi.hou@....com> a écrit :
>
>> of_create_node() creates device node dynamically. The parent device node
>> and full name are required for creating the node. It optionally creates
>> an OF changeset and attaches the newly created node to the changeset. The
>> device node pointer and the changeset pointer can be used to add
>> properties to the device node and apply the node to the base tree.
>>
>> of_destroy_node() frees the device node created by of_create_node(). If
>> an OF changeset was also created for this node, it will destroy the
>> changeset before freeing the device node.
>>
>> Expand of_changeset APIs to handle specific types of properties.
>>      of_changeset_add_prop_string()
>>      of_changeset_add_prop_string_array()
>>      of_changeset_add_prop_u32_array()
>>
>> Signed-off-by: Lizhi Hou <lizhi.hou@....com>
>> Signed-off-by: Sonal Santan <sonal.santan@....com>
>> Signed-off-by: Max Zhen <max.zhen@....com>
>> Reviewed-by: Brian Xu <brian.xu@....com>
>> ---
>>   drivers/of/dynamic.c | 197 +++++++++++++++++++++++++++++++++++++++++++
>>   include/linux/of.h   |  24 ++++++
>>   2 files changed, 221 insertions(+)
>>
>> diff --git a/drivers/of/dynamic.c b/drivers/of/dynamic.c
>> index cd3821a6444f..067d996a9f79 100644
>> --- a/drivers/of/dynamic.c
>> +++ b/drivers/of/dynamic.c
>> @@ -461,6 +461,71 @@ struct device_node *__of_node_dup(const struct device_node *np,
>>   	return NULL;
>>   }
>>   
>> +/**
>> + * of_create_node - Dynamically create a device node
>> + *
>> + * @parent: Pointer to parent device node
>> + * @full_name: Node full name
>> + * @cset: Pointer to returning changeset
>> + *
>> + * Return: Pointer to the created device node or NULL in case of an error.
>> + */
>> +struct device_node *of_create_node(struct device_node *parent,
>> +				   const char *full_name,
>> +				   struct of_changeset **cset)
>> +{
>> +	struct of_changeset *ocs;
>> +	struct device_node *np;
>> +	int ret;
>> +
>> +	np = __of_node_dup(NULL, full_name);
>> +	if (!np)
>> +		return NULL;
>> +	np->parent = parent;
>> +
>> +	if (!cset)
>> +		return np;
>> +
>> +	ocs = kmalloc(sizeof(*cset), GFP_KERNEL);
> I started to test this series and this sizeof(*cset) is probably wrong,
> it should be sizeof(*ocs) or it will yield the size of a struct
> of_changeset pointer and not the struct of_changeset itself.

I will fix this. Thanks.

Lizhi

>