From: Guenter Roeck <linux@roeck-us.net>
To: Sasha Levin <sashal@kernel.org>,
linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: jdelvare@suse.com, corbet@lwn.net, linux-hwmon@vger.kernel.org,
linux-doc@vger.kernel.org
Subject: Re: [PATCH AUTOSEL 4.19 36/38] hwmon: Make chip parameter for with_info API mandatory
Date: Mon, 30 May 2022 07:29:00 -0700 [thread overview]
Message-ID: <aa75985e-ad75-4c71-40d8-e7d23c686f58@roeck-us.net> (raw)
In-Reply-To: <20220530134924.1936816-36-sashal@kernel.org>
On 5/30/22 06:49, Sasha Levin wrote:
> From: Guenter Roeck <linux@roeck-us.net>
>
> [ Upstream commit ddaefa209c4ac791c1262e97c9b2d0440c8ef1d5 ]
>
> Various attempts were made recently to "convert" the old
> hwmon_device_register() API to devm_hwmon_device_register_with_info()
> by just changing the function name without actually converting the
> driver. Prevent this from happening by making the 'chip' parameter of
> devm_hwmon_device_register_with_info() mandatory.
>
> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
> Signed-off-by: Sasha Levin <sashal@kernel.org>
Please drop.
Guenter
> ---
> Documentation/hwmon/hwmon-kernel-api.txt | 2 +-
> drivers/hwmon/hwmon.c | 16 +++++++---------
> 2 files changed, 8 insertions(+), 10 deletions(-)
>
> diff --git a/Documentation/hwmon/hwmon-kernel-api.txt b/Documentation/hwmon/hwmon-kernel-api.txt
> index eb7a78aebb38..4981df157b04 100644
> --- a/Documentation/hwmon/hwmon-kernel-api.txt
> +++ b/Documentation/hwmon/hwmon-kernel-api.txt
> @@ -71,7 +71,7 @@ hwmon_device_register_with_info is the most comprehensive and preferred means
> to register a hardware monitoring device. It creates the standard sysfs
> attributes in the hardware monitoring core, letting the driver focus on reading
> from and writing to the chip instead of having to bother with sysfs attributes.
> -The parent device parameter cannot be NULL with non-NULL chip info. Its
> +The parent device parameter as well as the chip parameter must not be NULL. Its
> parameters are described in more detail below.
>
> devm_hwmon_device_register_with_info is similar to
> diff --git a/drivers/hwmon/hwmon.c b/drivers/hwmon/hwmon.c
> index c4051a3e63c2..fb82d8ee0dd6 100644
> --- a/drivers/hwmon/hwmon.c
> +++ b/drivers/hwmon/hwmon.c
> @@ -695,11 +695,12 @@ EXPORT_SYMBOL_GPL(hwmon_device_register_with_groups);
>
> /**
> * hwmon_device_register_with_info - register w/ hwmon
> - * @dev: the parent device
> - * @name: hwmon name attribute
> - * @drvdata: driver data to attach to created device
> - * @chip: pointer to hwmon chip information
> + * @dev: the parent device (mandatory)
> + * @name: hwmon name attribute (mandatory)
> + * @drvdata: driver data to attach to created device (optional)
> + * @chip: pointer to hwmon chip information (mandatory)
> * @extra_groups: pointer to list of additional non-standard attribute groups
> + * (optional)
> *
> * hwmon_device_unregister() must be called when the device is no
> * longer needed.
> @@ -712,13 +713,10 @@ hwmon_device_register_with_info(struct device *dev, const char *name,
> const struct hwmon_chip_info *chip,
> const struct attribute_group **extra_groups)
> {
> - if (!name)
> - return ERR_PTR(-EINVAL);
> -
> - if (chip && (!chip->ops || !chip->ops->is_visible || !chip->info))
> + if (!dev || !name || !chip)
> return ERR_PTR(-EINVAL);
>
> - if (chip && !dev)
> + if (!chip->ops || !chip->ops->is_visible || !chip->info)
> return ERR_PTR(-EINVAL);
>
> return __hwmon_device_register(dev, name, drvdata, chip, extra_groups);
next prev parent reply other threads:[~2022-05-30 15:26 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-30 13:48 [PATCH AUTOSEL 4.19 01/38] drm/virtio: fix NULL pointer dereference in virtio_gpu_conn_get_modes Sasha Levin
2022-05-30 13:48 ` [PATCH AUTOSEL 4.19 02/38] mwifiex: add mutex lock for call in mwifiex_dfs_chan_sw_work_queue Sasha Levin
2022-05-30 13:48 ` [PATCH AUTOSEL 4.19 03/38] b43legacy: Fix assigning negative value to unsigned variable Sasha Levin
2022-05-30 13:48 ` [PATCH AUTOSEL 4.19 04/38] b43: " Sasha Levin
2022-05-30 13:48 ` [PATCH AUTOSEL 4.19 05/38] ipw2x00: Fix potential NULL dereference in libipw_xmit() Sasha Levin
2022-05-30 13:48 ` [PATCH AUTOSEL 4.19 06/38] ipv6: fix locking issues with loops over idev->addr_list Sasha Levin
2022-05-30 13:48 ` [PATCH AUTOSEL 4.19 07/38] fbcon: Consistently protect deferred_takeover with console_lock() Sasha Levin
2022-05-30 13:48 ` [PATCH AUTOSEL 4.19 08/38] ACPICA: Avoid cache flush inside virtual machines Sasha Levin
2022-05-30 13:48 ` [PATCH AUTOSEL 4.19 09/38] ALSA: jack: Access input_dev under mutex Sasha Levin
2022-05-30 13:48 ` [PATCH AUTOSEL 4.19 10/38] drm/amd/pm: fix double free in si_parse_power_table() Sasha Levin
2022-05-30 13:48 ` [PATCH AUTOSEL 4.19 11/38] ath9k: fix QCA9561 PA bias level Sasha Levin
2022-05-30 13:48 ` [PATCH AUTOSEL 4.19 12/38] media: venus: hfi: avoid null dereference in deinit Sasha Levin
2022-05-30 13:48 ` [PATCH AUTOSEL 4.19 13/38] media: pci: cx23885: Fix the error handling in cx23885_initdev() Sasha Levin
2022-05-30 13:49 ` [PATCH AUTOSEL 4.19 14/38] media: cx25821: Fix the warning when removing the module Sasha Levin
2022-05-30 13:49 ` [PATCH AUTOSEL 4.19 15/38] md/bitmap: don't set sb values if can't pass sanity check Sasha Levin
2022-05-30 13:49 ` [PATCH AUTOSEL 4.19 16/38] drm/sun4i: Add support for D1 TCONs Sasha Levin
2022-05-30 14:41 ` Samuel Holland
2022-06-05 13:28 ` Sasha Levin
2022-05-30 13:49 ` [PATCH AUTOSEL 4.19 17/38] scsi: megaraid: Fix error check return value of register_chrdev() Sasha Levin
2022-05-30 13:49 ` [PATCH AUTOSEL 4.19 18/38] drm/plane: Move range check for format_count earlier Sasha Levin
2022-05-30 13:49 ` [PATCH AUTOSEL 4.19 19/38] drm/amd/pm: fix the compile warning Sasha Levin
2022-05-30 13:49 ` [PATCH AUTOSEL 4.19 20/38] ipv6: Don't send rs packets to the interface of ARPHRD_TUNNEL Sasha Levin
2022-05-30 13:49 ` [PATCH AUTOSEL 4.19 21/38] ASoC: dapm: Don't fold register value changes into notifications Sasha Levin
2022-05-30 13:49 ` [PATCH AUTOSEL 4.19 22/38] mlxsw: spectrum_dcb: Do not warn about priority changes Sasha Levin
2022-05-30 13:49 ` [PATCH AUTOSEL 4.19 23/38] ASoC: tscs454: Add endianness flag in snd_soc_component_driver Sasha Levin
2022-05-30 13:49 ` [PATCH AUTOSEL 4.19 24/38] net: remove two BUG() from skb_checksum_help() Sasha Levin
2022-05-30 13:49 ` [PATCH AUTOSEL 4.19 25/38] s390/preempt: disable __preempt_count_add() optimization for PROFILE_ALL_BRANCHES Sasha Levin
2022-05-30 13:49 ` [PATCH AUTOSEL 4.19 26/38] dma-debug: change allocation mode from GFP_NOWAIT to GFP_ATIOMIC Sasha Levin
2022-05-30 13:49 ` [PATCH AUTOSEL 4.19 27/38] ipmi:ssif: Check for NULL msg when handling events and messages Sasha Levin
2022-05-30 13:49 ` [PATCH AUTOSEL 4.19 28/38] rtlwifi: Use pr_warn instead of WARN_ONCE Sasha Levin
2022-05-30 13:49 ` [PATCH AUTOSEL 4.19 29/38] media: cec-adap.c: fix is_configuring state Sasha Levin
2022-05-30 13:49 ` [PATCH AUTOSEL 4.19 30/38] openrisc: start CPU timer early in boot Sasha Levin
2022-05-30 13:49 ` [PATCH AUTOSEL 4.19 31/38] nvme-pci: fix a NULL pointer dereference in nvme_alloc_admin_tags Sasha Levin
2022-05-30 13:49 ` [PATCH AUTOSEL 4.19 32/38] ASoC: rt5645: Fix errorenous cleanup order Sasha Levin
2022-05-30 13:49 ` [PATCH AUTOSEL 4.19 33/38] net: phy: micrel: Allow probing without .driver_data Sasha Levin
2022-05-30 13:49 ` [PATCH AUTOSEL 4.19 34/38] media: exynos4-is: Fix compile warning Sasha Levin
2022-05-30 13:49 ` [PATCH AUTOSEL 4.19 35/38] ARM: 9201/1: spectre-bhb: rely on linker to emit cross-section literal loads Sasha Levin
2022-05-30 13:52 ` Ard Biesheuvel
2022-05-30 13:49 ` [PATCH AUTOSEL 4.19 36/38] hwmon: Make chip parameter for with_info API mandatory Sasha Levin
2022-05-30 14:29 ` Guenter Roeck [this message]
2022-05-30 13:49 ` [PATCH AUTOSEL 4.19 37/38] rxrpc: Return an error to sendmsg if call failed Sasha Levin
2022-05-30 13:49 ` [PATCH AUTOSEL 4.19 38/38] eth: tg3: silence the GCC 12 array-bounds warning Sasha Levin
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