[PATCH 1/2] iio: adc: sun4i-gpadc-iio: drop underflowing pm_runtime_put() calls

From: Felix Gu

Date: Sun Sep 06 2026 - 12:06:06 EST


Neither the error path in sun4i_gpadc_probe() nor sun4i_gpadc_remove()
ever holds a runtime PM usage count. So the pm_runtime_put() in both
places always triggers the "Runtime PM usage count underflow!" warning
on every failed probe and every unbind.

Drop both calls.

Fixes: d1caa9905538 ("iio: adc: add support for Allwinner SoCs ADC")
Signed-off-by: Felix Gu <ustc.gu@xxxxxxxxx>
---
drivers/iio/adc/sun4i-gpadc-iio.c | 2 --
1 file changed, 2 deletions(-)

diff --git a/drivers/iio/adc/sun4i-gpadc-iio.c b/drivers/iio/adc/sun4i-gpadc-iio.c
index 203459ca9907..85382e435f2a 100644
--- a/drivers/iio/adc/sun4i-gpadc-iio.c
+++ b/drivers/iio/adc/sun4i-gpadc-iio.c
@@ -657,7 +657,6 @@ static int sun4i_gpadc_probe(struct platform_device *pdev)
if (!info->no_irq && IS_ENABLED(CONFIG_THERMAL_OF))
iio_map_array_unregister(indio_dev);

- pm_runtime_put(&pdev->dev);
pm_runtime_disable(&pdev->dev);

return ret;
@@ -668,7 +667,6 @@ static void sun4i_gpadc_remove(struct platform_device *pdev)
struct iio_dev *indio_dev = platform_get_drvdata(pdev);
struct sun4i_gpadc_iio *info = iio_priv(indio_dev);

- pm_runtime_put(&pdev->dev);
pm_runtime_disable(&pdev->dev);

if (!IS_ENABLED(CONFIG_THERMAL_OF))

--
2.53.0