linux-kernel - Re: [PATCH v2 1/1] i3c: master: Drop duplicate check before calling OF APIs

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Message-ID: <Z+G1Dn2XOx9gLRTw@lizhi-Precision-Tower-5810>
Date: Mon, 24 Mar 2025 15:39:58 -0400
From: Frank Li <Frank.li@....com>
To: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc: Alexandre Belloni <alexandre.belloni@...tlin.com>,
	linux-i3c@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/1] i3c: master: Drop duplicate check before calling
 OF APIs

On Fri, Mar 21, 2025 at 09:30:06PM +0200, Andy Shevchenko wrote:
> OF APIs are usually NULL-aware and returns an error in case when
> device node is not present or supported. We already have a check
> for the returned value, no need to check for the parameter.
>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

Reviewed-by: Frank Li <Frank.Li@....com>

> ---
>
> v2: added missed updates (hit 'send' too early in v1)
>
>  drivers/i3c/master.c | 18 ++++++------------
>  1 file changed, 6 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c
> index d5dc4180afbc..fd26c4bb8b34 100644
> --- a/drivers/i3c/master.c
> +++ b/drivers/i3c/master.c
> @@ -2276,7 +2276,7 @@ static int of_i3c_master_add_dev(struct i3c_master_controller *master,
>  	u32 reg[3];
>  	int ret;
>
> -	if (!master || !node)
> +	if (!master)
>  		return -EINVAL;
>
>  	ret = of_property_read_u32_array(node, "reg", reg, ARRAY_SIZE(reg));
> @@ -2369,14 +2369,10 @@ static u8 i3c_master_i2c_get_lvr(struct i2c_client *client)
>  {
>  	/* Fall back to no spike filters and FM bus mode. */
>  	u8 lvr = I3C_LVR_I2C_INDEX(2) | I3C_LVR_I2C_FM_MODE;
> +	u32 reg[3];
>
> -	if (client->dev.of_node) {
> -		u32 reg[3];
> -
> -		if (!of_property_read_u32_array(client->dev.of_node, "reg",
> -						reg, ARRAY_SIZE(reg)))
> -			lvr = reg[2];
> -	}
> +	if (!of_property_read_u32_array(client->dev.of_node, "reg", reg, ARRAY_SIZE(reg)))
> +		lvr = reg[2];
>
>  	return lvr;
>  }
> @@ -2486,7 +2482,7 @@ static int i3c_master_i2c_adapter_init(struct i3c_master_controller *master)
>  	struct i2c_adapter *adap = i3c_master_to_i2c_adapter(master);
>  	struct i2c_dev_desc *i2cdev;
>  	struct i2c_dev_boardinfo *i2cboardinfo;
> -	int ret, id = -ENODEV;
> +	int ret, id;
>
>  	adap->dev.parent = master->dev.parent;
>  	adap->owner = master->dev.parent->driver->owner;
> @@ -2497,9 +2493,7 @@ static int i3c_master_i2c_adapter_init(struct i3c_master_controller *master)
>  	adap->timeout = 1000;
>  	adap->retries = 3;
>
> -	if (master->dev.of_node)
> -		id = of_alias_get_id(master->dev.of_node, "i2c");
> -
> +	id = of_alias_get_id(master->dev.of_node, "i2c");
>  	if (id >= 0) {
>  		adap->nr = id;
>  		ret = i2c_add_numbered_adapter(adap);
> --
> 2.47.2
>