From: Daniel Scally <djrscally@gmail.com>
To: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
ACPI Devel Maling List <linux-acpi@vger.kernel.org>,
Linux Media Mailing List <linux-media@vger.kernel.org>,
devel@acpica.org, "Rafael J. Wysocki" <rjw@rjwysocki.net>,
Len Brown <lenb@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Yong Zhi <yong.zhi@intel.com>,
Sakari Ailus <sakari.ailus@linux.intel.com>,
Bingbu Cao <bingbu.cao@intel.com>,
Tian Shu Qiu <tian.shu.qiu@intel.com>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
Robert Moore <robert.moore@intel.com>,
Erik Kaneda <erik.kaneda@intel.com>,
Petr Mladek <pmladek@suse.com>,
Steven Rostedt <rostedt@goodmis.org>,
Sergey Senozhatsky <sergey.senozhatsky@gmail.com>,
Rasmus Villemoes <linux@rasmusvillemoes.dk>,
Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>,
Jacopo Mondi <jacopo+renesas@jmondi.org>,
kieran.bingham+renesas@ideasonboard.com,
Linus Walleij <linus.walleij@linaro.org>,
"Krogerus, Heikki" <heikki.krogerus@linux.intel.com>,
Tsuchiya Yuto <kitakar@gmail.com>,
jorhand@linux.microsoft.com
Subject: Re: [PATCH v2 12/12] ipu3-cio2: Add cio2-bridge to ipu3-cio2 driver
Date: Sat, 19 Dec 2020 23:48:51 +0000 [thread overview]
Message-ID: <e86fc26d-8c2f-c8a6-fc2e-ec612fd5d158@gmail.com> (raw)
In-Reply-To: <CAHp75VcebKas4j-vByodicHxRMrO4jkaJToSUW3iLJC2+vY_iA@mail.gmail.com>
On 19/12/2020 18:52, Andy Shevchenko wrote:
> On Sat, Dec 19, 2020 at 2:25 AM Daniel Scally <djrscally@gmail.com> wrote:
>> On 18/12/2020 21:17, Andy Shevchenko wrote:
>>> On Thu, Dec 17, 2020 at 11:43:37PM +0000, Daniel Scally wrote:
>
> ...
>
>>>> + sensor->ep_properties[0] = PROPERTY_ENTRY_U32(sensor->prop_names.bus_type, 4);
>>>
>>> Does 4 has any meaning that can be described by #define ?
>>
>> It's V4L2_FWNODE_BUS_TYPE_CSI2_DPHY:
>>
>> https://elixir.bootlin.com/linux/latest/source/drivers/media/v4l2-core/v4l2-fwnode.c#L36
>>
>> That enum's not in an accessible header, but I can define it in this
>> module's header
>
> Maybe you can do a preparatory patch to make it visible to v4l2
> drivers? (Like moving to one of v4l2 headers)
Sure ok, guess media/v4l2-fwnode.h makes the most sense.
> ...
>
>>>> + if (bridge->n_sensors >= CIO2_NUM_PORTS) {
>>>> + dev_warn(&cio2->dev, "Exceeded available CIO2 ports\n");
>>>
>>>> + /* overflow i so outer loop ceases */
>>>> + i = ARRAY_SIZE(cio2_supported_sensors);
>>>> + break;
>>>
>>> Why not to create a new label below and assign ret here with probably comment
>>> why it's not an error?
>>
>> Sure, I can do that, but since it wouldn't need any cleanup I could also
>> just return 0 here as Laurent suggest (but with a comment explaining why
>> that's ok as you say) - do you have a preference?
>
> While it's a good suggestion it will bring a bit of inconsistency into
> approach. Everywhere else in the function you are using the goto
> approach.
> So yes, I have a preference.
No problem
>>>> + }
>
> ...
>
>>>> + ret = cio2_bridge_read_acpi_buffer(adev, "SSDB",
>>>> + &sensor->ssdb,
>>>> + sizeof(sensor->ssdb));
>>>> + if (ret < 0)
>>>
>>> if (ret) (because positive case can be returned just by next conditional).
>>
>> cio2_bridge_read_acpi_buffer() returns the buffer length on success at
>> the moment, but I can change it to return 0 and have this be if (ret)
>
> Please correct this somehow, because the next failure returns it
> instead of error...
Ah! Good spot - thank you. I will fix that yes.
>>>> + goto err_put_adev;
>>>> +
>>>> + if (sensor->ssdb.lanes > 4) {
>>>> + dev_err(&adev->dev,
>>>> + "Number of lanes in SSDB is invalid\n");
>
> ...I'm even thinking that you have to assign ret here to something meaningful.
Yeah I agree, I will do this too.
>>>> + goto err_put_adev;
>>>> + }
>
next prev parent reply other threads:[~2020-12-19 23:49 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
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 [this message]
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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