From: Daniel Scally <djrscally@gmail.com>
To: Sakari Ailus <sakari.ailus@linux.intel.com>
Cc: linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org,
linux-media@vger.kernel.org, devel@acpica.org, rjw@rjwysocki.net,
lenb@kernel.org, gregkh@linuxfoundation.org, yong.zhi@intel.com,
bingbu.cao@intel.com, tian.shu.qiu@intel.com, mchehab@kernel.org,
robert.moore@intel.com, erik.kaneda@intel.com, pmladek@suse.com,
rostedt@goodmis.org, sergey.senozhatsky@gmail.com,
andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk,
laurent.pinchart+renesas@ideasonboard.com,
jacopo+renesas@jmondi.org,
kieran.bingham+renesas@ideasonboard.com,
linus.walleij@linaro.org, heikki.krogerus@linux.intel.com,
kitakar@gmail.com, jorhand@linux.microsoft.com
Subject: Re: [PATCH v2 06/12] software_node: Add support for fwnode_graph*() family of functions
Date: Mon, 21 Dec 2020 10:01:50 +0000 [thread overview]
Message-ID: <b6228b89-cbc8-9b8a-6a68-a401e2e803fc@gmail.com> (raw)
In-Reply-To: <20201221093408.GH26370@paasikivi.fi.intel.com>
Hi Sakari - thanks for the reviews in previous emails
On 21/12/2020 09:34, Sakari Ailus wrote:
> Hi Daniel and Heikki,
>
> On Thu, Dec 17, 2020 at 11:43:31PM +0000, Daniel Scally wrote:
>
> +static struct fwnode_handle *
> +software_node_graph_get_port_parent(struct fwnode_handle *fwnode)
> +{
> + struct swnode *swnode = to_swnode(fwnode);
> + struct fwnode_handle *parent;
> +
> + if (!strcmp(swnode->parent->node->name, "ports"))
> + parent = &swnode->parent->parent->fwnode;
> + else
> + parent = &swnode->parent->fwnode;
> If you happen to call this function on a non-port node for whatever reason,
> you may end up accessing a pointer that's NULL, can't you?
Yes, actually.
> Instead I'd do
> something like:
>
> swnode = swnode->parent;
> if (swnode && !strcmp(swnode->node->name, "ports"))
> swnode = swnode->parent;
>
> return swnode ? software_node_get(&swnode->fwnode) : NULL;
>
> You can also drop parent as a by-product of this.
Yes ok, that looks good to me - thanks.
>> +
>> + return software_node_get(parent);
>> +}
>> +
>> +static int
>> +software_node_graph_parse_endpoint(const struct fwnode_handle *fwnode,
>> + struct fwnode_endpoint *endpoint)
>> +{
>> + struct swnode *swnode = to_swnode(fwnode);
>> + int ret;
>> +
>> + ret = kstrtou32(swnode->parent->node->name + 5, 10, &endpoint->port);
>> + if (ret)
>> + return ret;
>> +
>> + endpoint->id = swnode->id;
>> + endpoint->local_fwnode = fwnode;
>> +
>> + return 0;
>> +}
>> +
>> static const struct fwnode_operations software_node_ops = {
>> .get = software_node_get,
>> .put = software_node_put,
>> @@ -551,7 +655,11 @@ static const struct fwnode_operations software_node_ops = {
>> .get_parent = software_node_get_parent,
>> .get_next_child_node = software_node_get_next_child,
>> .get_named_child_node = software_node_get_named_child_node,
>> - .get_reference_args = software_node_get_reference_args
>> + .get_reference_args = software_node_get_reference_args,
>> + .graph_get_next_endpoint = software_node_graph_get_next_endpoint,
>> + .graph_get_remote_endpoint = software_node_graph_get_remote_endpoint,
>> + .graph_get_port_parent = software_node_graph_get_port_parent,
>> + .graph_parse_endpoint = software_node_graph_parse_endpoint,
>> };
>>
>> /* -------------------------------------------------------------------------- */
next prev parent reply other threads:[~2020-12-21 10:09 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-17 23:43 [PATCH v2 00/12] Add functionality to ipu3-cio2 driver allowing software_node connections to sensors on platforms designed for Windows Daniel Scally
2020-12-17 23:43 ` [PATCH v2 01/12] software_node: Fix refcounts in software_node_get_next_child() Daniel Scally
2020-12-21 9:08 ` Sakari Ailus
2020-12-17 23:43 ` [PATCH v2 02/12] property: Return true in fwnode_device_is_available for NULL ops Daniel Scally
2020-12-21 9:10 ` Sakari Ailus
2020-12-17 23:43 ` [PATCH v2 03/12] property: Call fwnode_graph_get_endpoint_by_id() for fwnode->secondary Daniel Scally
2020-12-17 23:43 ` [PATCH v2 04/12] software_node: Enforce parent before child ordering of nodes arrays Daniel Scally
2020-12-18 16:02 ` Laurent Pinchart
2020-12-18 22:19 ` Daniel Scally
2020-12-18 20:29 ` Andy Shevchenko
2020-12-19 23:33 ` Daniel Scally
2020-12-17 23:43 ` [PATCH v2 05/12] software_node: unregister software_nodes in reverse order Daniel Scally
2020-12-18 20:31 ` Andy Shevchenko
2020-12-21 9:21 ` Sakari Ailus
2020-12-21 11:26 ` Andy Shevchenko
2020-12-23 22:24 ` Daniel Scally
2020-12-17 23:43 ` [PATCH v2 06/12] software_node: Add support for fwnode_graph*() family of functions Daniel Scally
2020-12-18 16:22 ` Laurent Pinchart
2020-12-18 22:13 ` Daniel Scally
2020-12-18 23:46 ` Daniel Scally
2020-12-18 20:37 ` Andy Shevchenko
2020-12-18 22:26 ` Daniel Scally
2020-12-21 9:34 ` Sakari Ailus
2020-12-21 10:01 ` Daniel Scally [this message]
2020-12-17 23:43 ` [PATCH v2 07/12] lib/test_printf.c: Use helper function to unwind array of software_nodes Daniel Scally
2020-12-17 23:43 ` [PATCH v2 08/12] ipu3-cio2: Add T: entry to MAINTAINERS Daniel Scally
2020-12-17 23:43 ` [PATCH v2 09/12] ipu3-cio2: Rename ipu3-cio2.c Daniel Scally
2020-12-17 23:43 ` [PATCH v2 10/12] media: v4l2-core: v4l2-async: Check sd->fwnode->secondary in match_fwnode() Daniel Scally
2020-12-17 23:43 ` [PATCH v2 11/12] acpi: Add acpi_dev_get_next_match_dev() and helper macro Daniel Scally
2020-12-18 20:42 ` Andy Shevchenko
2020-12-21 9:47 ` Sakari Ailus
2020-12-17 23:43 ` [PATCH v2 12/12] ipu3-cio2: Add cio2-bridge to ipu3-cio2 driver Daniel Scally
2020-12-18 16:53 ` Laurent Pinchart
2020-12-18 23:57 ` Daniel Scally
2020-12-19 0:39 ` Laurent Pinchart
2020-12-19 23:24 ` Daniel Scally
2020-12-18 21:17 ` Andy Shevchenko
2020-12-19 0:22 ` Daniel Scally
2020-12-19 18:52 ` Andy Shevchenko
2020-12-19 23:48 ` Daniel Scally
2020-12-21 10:21 ` Sakari Ailus
2020-12-21 10:52 ` Daniel Scally
2020-12-21 10:57 ` Sakari Ailus
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