From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
To: "Marek Behún" <kabel@kernel.org>
Cc: Jonathan.Cameron@huawei.com, Laurent.pinchart@ideasonboard.com,
airlied@gmail.com, andrzej.hajda@intel.com, arm@kernel.org,
arnd@arndb.de, bamv2005@gmail.com, brgl@bgdev.pl,
daniel@ffwll.ch, davem@davemloft.net, dianders@chromium.org,
dri-devel@lists.freedesktop.org, eajames@linux.ibm.com,
gaurav.jain@nxp.com, gregory.clement@bootlin.com,
hdegoede@redhat.com, herbert@gondor.apana.org.au,
horia.geanta@nxp.com, james.clark@arm.com, james@equiv.tech,
jdelvare@suse.com, jernej.skrabec@gmail.com, jonas@kwiboo.se,
linus.walleij@linaro.org, linux-crypto@vger.kernel.org,
linux-gpio@vger.kernel.org, linux-hwmon@vger.kernel.org,
linux-kernel@vger.kernel.org, linux@roeck-us.net,
maarten.lankhorst@linux.intel.com, mazziesaccount@gmail.com,
mripard@kernel.org, naresh.solanki@9elements.com,
neil.armstrong@linaro.org, pankaj.gupta@nxp.com,
patrick.rudolph@9elements.com, rfoss@kernel.org, soc@kernel.org,
tzimmermann@suse.de
Subject: Re: [PATCH v5 08/11] devm-helpers: Add resource managed version of debugfs directory create function
Date: Sun, 24 Mar 2024 10:21:28 +0100 [thread overview]
Message-ID: <69264f8a-a113-4d49-b8a6-fb9e858584e4@wanadoo.fr> (raw)
In-Reply-To: <20240323222506.4ffbdd71@thinkpad>
Le 23/03/2024 à 22:25, Marek Behún a écrit :
> On Sat, 23 Mar 2024 22:10:40 +0100
> Christophe JAILLET <christophe.jaillet@wanadoo.fr> wrote:
>
...
>>> static int pvt_ts_dbgfs_create(struct pvt_device *pvt, struct device *dev)
>>> {
>>> - pvt->dbgfs_dir = debugfs_create_dir(dev_name(dev), NULL);
>>> + pvt->dbgfs_dir = devm_debugfs_create_dir(dev, dev_name(dev), NULL);
>>> + if (IS_ERR(pvt->dbgfs_dir))
>>> + return PTR_ERR(pvt->dbgfs_dir);
>>
>> Not sure if the test and error handling should be added here.
>> *If I'm correct*, functions related to debugfs already handle this case
>> and just do nothing. And failure in debugfs related code is not
>> considered as something that need to be reported and abort a probe function.
>>
>> Maybe the same other (already existing) tests in this patch should be
>> removed as well, in a separated patch.
>
> Functions related to debugfs maybe do, but devm_ resource management
> functions may fail to allocate release structure, and those errors need
> to be handled, AFAIK.
I would say no.
If this memory allocation fails, then debugfs_create_dir() will not be
called, but that's not a really big deal if the driver itself can still
run normally without it.
Up to you to leave it as-is or remove what I think is a useless error
handling.
At least, maybe it could be said in the commit log, so that maintainers
can comment on it, if they don't spot the error handling you introduce.
CJ
>
> Marek
>
next prev parent reply other threads:[~2024-03-24 9:21 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-23 16:43 [PATCH v5 00/11] Turris Omnia MCU driver Marek Behún
2024-03-23 16:43 ` [PATCH v5 01/11] dt-bindings: arm: add cznic,turris-omnia-mcu binding Marek Behún
2024-03-26 8:45 ` Krzysztof Kozlowski
2024-03-26 9:02 ` Marek Behún
2024-03-23 16:43 ` [PATCH v5 02/11] platform: cznic: Add preliminary support for Turris Omnia MCU Marek Behún
2024-03-24 11:01 ` Andy Shevchenko
2024-03-24 15:04 ` Marek Behún
2024-03-24 15:30 ` Andy Shevchenko
2024-03-25 10:39 ` Marek Behún
2024-04-02 16:41 ` Marek Behún
2024-03-23 16:43 ` [PATCH v5 03/11] platform: cznic: turris-omnia-mcu: Add support for MCU connected GPIOs Marek Behún
2024-03-25 9:10 ` Matti Vaittinen
2024-03-25 9:53 ` Marek Behún
2024-03-25 10:25 ` Matti Vaittinen
2024-04-02 9:59 ` Dan Carpenter
2024-03-23 16:43 ` [PATCH v5 04/11] platform: cznic: turris-omnia-mcu: Add support for poweroff and wakeup Marek Behún
2024-03-23 16:43 ` [PATCH v5 05/11] platform: cznic: turris-omnia-mcu: Add support for MCU watchdog Marek Behún
2024-03-23 16:43 ` [PATCH v5 06/11] devm-helpers: Add resource managed version of irq_create_mapping() Marek Behún
2024-03-25 9:40 ` Matti Vaittinen
2024-03-25 9:57 ` Marek Behún
2024-03-26 9:00 ` Dan Carpenter
2024-03-27 9:34 ` Marek Behún
2024-03-27 11:39 ` Dan Carpenter
2024-03-23 16:43 ` [PATCH v5 07/11] platform: cznic: turris-omnia-mcu: Add support for MCU provided TRNG Marek Behún
2024-03-23 16:43 ` [PATCH v5 08/11] devm-helpers: Add resource managed version of debugfs directory create function Marek Behún
2024-03-23 17:21 ` Guenter Roeck
2024-03-23 16:43 ` [PATCH v5 09/11] platform: cznic: turris-omnia-mcu: Add support for digital message signing via debugfs Marek Behún
2024-03-23 16:43 ` [PATCH v5 10/11] ARM: dts: turris-omnia: Add MCU system-controller node Marek Behún
2024-03-23 16:43 ` [PATCH v5 11/11] ARM: dts: turris-omnia: Add GPIO key node for front button Marek Behún
[not found] ` <20240323164359.21642-9-kabel__6885.49310886941$1711212291$gmane$org@kernel.org>
2024-03-23 21:10 ` [PATCH v5 08/11] devm-helpers: Add resource managed version of debugfs directory create function Christophe JAILLET
2024-03-23 21:25 ` Marek Behún
2024-03-24 9:21 ` Christophe JAILLET [this message]
2024-03-24 15:08 ` Marek Behún
2024-03-25 11:05 ` Dan Carpenter
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