Re: [PATCH v2 2/2] iio: gyro: hid-sensor-gyro-3d: Use dev_err_probe()

[Jonathan Cameron]

On Fri, 24 Jul 2026 22:57:21 +0530
Sanjay Chitroda via B4 Relay <devnull+sanjayembeddedse.gmail.com@xxxxxxxxxx> wrote:

> From: Sanjay Chitroda <sanjayembeddedse@xxxxxxxxx>
> 
> Replace dev_err() calls with dev_err_probe() during probe.
> 
> dev_err_probe() makes error code handling simpler and handle
> deferred probe nicely (avoid spamming logs).

There are changes in here that aren't mentioned.

A common way to handle this is to add.  

"To simplify the added dev_err_probe() calls, add a local struct devic
 variable." 

Then in a follow up patch do the rest and state something like

"Use the local struct device *dev to replace &pdev->dev, simplifying
code."

> 
> Signed-off-by: Sanjay Chitroda <sanjayembeddedse@xxxxxxxxx>
> ---
>  drivers/iio/gyro/hid-sensor-gyro-3d.c | 19 ++++++++-----------
>  1 file changed, 8 insertions(+), 11 deletions(-)
> 
> diff --git a/drivers/iio/gyro/hid-sensor-gyro-3d.c b/drivers/iio/gyro/hid-sensor-gyro-3d.c
> index bcf53e267701..749a2ecbc2d1 100644
> --- a/drivers/iio/gyro/hid-sensor-gyro-3d.c
> +++ b/drivers/iio/gyro/hid-sensor-gyro-3d.c
> @@ -264,13 +264,14 @@ static int gyro_3d_parse_report(struct platform_device *pdev,
>  /* Function to initialize the processing for usage id */
>  static int hid_gyro_3d_probe(struct platform_device *pdev)
>  {
> -	struct hid_sensor_hub_device *hsdev = dev_get_platdata(&pdev->dev);
> +	struct device *dev = &pdev->dev;
> +	struct hid_sensor_hub_device *hsdev = dev_get_platdata(dev);
>  	int ret = 0;
>  	static const char *name = "gyro_3d";
>  	struct iio_dev *indio_dev;
>  	struct gyro_3d_state *gyro_state;
>  
> -	indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*gyro_state));
> +	indio_dev = devm_iio_device_alloc(dev, sizeof(*gyro_state));
>  	if (!indio_dev)
>  		return -ENOMEM;
>  	platform_set_drvdata(pdev, indio_dev);
> @@ -284,12 +285,10 @@ static int hid_gyro_3d_probe(struct platform_device *pdev)
>  						&gyro_state->common_attributes,
>  						gyro_3d_sensitivity_addresses,
>  						ARRAY_SIZE(gyro_3d_sensitivity_addresses));
> -	if (ret) {
> -		dev_err(&pdev->dev, "failed to setup common attributes\n");
> -		return ret;
> -	}
> +	if (ret)
> +		return dev_err_probe(dev, ret, "failed to setup common attributes\n");
>  
> -	indio_dev->channels = devm_kmemdup(&pdev->dev, gyro_3d_channels,
> +	indio_dev->channels = devm_kmemdup(dev, gyro_3d_channels,
>  					   sizeof(gyro_3d_channels), GFP_KERNEL);
This is the case I'm saying doesn't belong in this patch.

Jonathan

>  	if (!indio_dev->channels)
>  		return -ENOMEM;
> @@ -297,10 +296,8 @@ static int hid_gyro_3d_probe(struct platform_device *pdev)
>  	ret = gyro_3d_parse_report(pdev, hsdev,
>  				   (struct iio_chan_spec *)indio_dev->channels,
>  				   HID_USAGE_SENSOR_GYRO_3D, gyro_state);
> -	if (ret) {
> -		dev_err(&pdev->dev, "failed to setup attributes\n");
> -		return ret;
> -	}
> +	if (ret)
> +		return dev_err_probe(dev, ret, "failed to setup attributes\n");
>  
>  	indio_dev->num_channels = ARRAY_SIZE(gyro_3d_channels);
>  	indio_dev->info = &gyro_3d_info;
>