linux-kernel - Re: [PATCH 1/3] i2c: convert SMBus alert setup function to return an ERRPTR

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Date:   Mon, 17 Feb 2020 08:58:39 +0100
From:   Robert Richter <rrichter@...vell.com>
To:     Wolfram Sang <wsa+renesas@...g-engineering.com>
CC:     <linux-i2c@...r.kernel.org>,
        Benjamin Tissoires <benjamin.tissoires@...hat.com>,
        Phil Reid <preid@...ctromag.com.au>,
        "Wolfram Sang" <wsa@...-dreams.de>,
        Jean Delvare <jdelvare@...e.com>,
        George Cherian <gcherian@...vell.com>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/3] i2c: convert SMBus alert setup function to return an
 ERRPTR

On 10.02.20 18:29:25, Wolfram Sang wrote:
> Only few drivers use this call, so drivers and I2C core are converted at
> once with this patch. By simply using i2c_new_client_device() instead of
> i2c_new_device(), we easily can return an ERRPTR for this function as
> well. To make out of tree users aware that something changed, the
> function is renamed to i2c_install_smbus_alert().
> 
> Signed-off-by: Wolfram Sang <wsa+renesas@...g-engineering.com>

> -struct i2c_client *i2c_setup_smbus_alert(struct i2c_adapter *adapter,
> +struct i2c_client *i2c_install_smbus_alert(struct i2c_adapter *adapter,
>  					 struct i2c_smbus_alert_setup *setup);

This function naming is a bit odd. It creates a struct i2c_client.
Then, there is also i2c_new_client_device() and i2c_new_device(). For
i2c_new_client_device() there are no users at all outside of
i2c-core-base.c (except for Falcon NIC), it is only a wrapper.

So how about reducing the interface to those both only to:?

 i2c_new_device()
 i2c_new_device_smbus()

To avoid a namespace collision it could also get new names using
*_create_*.

Thanks,

-Robert