Re: [PATCH v2] iio: imu: inv_icm45600: fix regulator put warning when probe fails

[Jonathan Cameron <jic23@kernel.org>]

On Tue, 17 Feb 2026 11:44:50 +0100
Jean-Baptiste Maneyrol via B4 Relay <devnull+jean-baptiste.maneyrol.tdk.com@kernel.org> wrote:

> From: Jean-Baptiste Maneyrol <jean-baptiste.maneyrol@tdk.com>
> 
> When the driver probe fails we encounter a regulator put warning
> because vddio regulator is not stopped before release. The issue
> comes from pm_runtime not already setup when core probe fails and
> the vddio regulator disable callback is called.
> 
> Fix the issue by setting pm_runtime active early before vddio
> regulator resource cleanup. This requires to cut pm_runtime
> set_active and enable in 2 function calls.
> 
> Fixes: 7ff021a3faca ("iio: imu: inv_icm45600: add new inv_icm45600 driver")
> Signed-off-by: Jean-Baptiste Maneyrol <jean-baptiste.maneyrol@tdk.com>
> Cc: stable@vger.kernel.org
Applied to the fixes-togreg branch of iio.git.
Note I'll rebase that on rc1 once available and then spin a pull request.

Thanks,

Jonathan

> ---
> Changes in v2:
> - Rework patch to move pm_runtime set active early.
> - Requires to cut pm_runtime set active and enable in 2 functions.
> - Link to v1: https://lore.kernel.org/r/20260205-inv-icm45600-fix-regulator-put-warning-v1-1-314ec12512cb@tdk.com
> ---
>  drivers/iio/imu/inv_icm45600/inv_icm45600_core.c | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/iio/imu/inv_icm45600/inv_icm45600_core.c b/drivers/iio/imu/inv_icm45600/inv_icm45600_core.c
> index ab1cb7b9dba435a3280e50ab77cd16e903c7816c..811ff80a2e626b4c2bb7b718899abe77488c7745 100644
> --- a/drivers/iio/imu/inv_icm45600/inv_icm45600_core.c
> +++ b/drivers/iio/imu/inv_icm45600/inv_icm45600_core.c
> @@ -744,6 +744,11 @@ int inv_icm45600_core_probe(struct regmap *regmap, const struct inv_icm45600_chi
>  	 */
>  	fsleep(5 * USEC_PER_MSEC);
>  
> +	/* set pm_runtime active early for disable vddio resource cleanup */
> +	ret = pm_runtime_set_active(dev);
> +	if (ret)
> +		return ret;
> +
>  	ret = inv_icm45600_enable_regulator_vddio(st);
>  	if (ret)
>  		return ret;
> @@ -776,7 +781,7 @@ int inv_icm45600_core_probe(struct regmap *regmap, const struct inv_icm45600_chi
>  	if (ret)
>  		return ret;
>  
> -	ret = devm_pm_runtime_set_active_enabled(dev);
> +	ret = devm_pm_runtime_enable(dev);
>  	if (ret)
>  		return ret;
>  
> 
> ---
> base-commit: d820183f371d9aa8517a1cd21fe6edacf0f94b7f
> change-id: 20260205-inv-icm45600-fix-regulator-put-warning-7c45a49c4c53
> 
> Best regards,