From: Maxim Kochetkov <fido_max@inbox.ru> commit e71e6dbe96ac80ac2aebe71a6a942e7bd60e7596 upstream. To stop conversion ads1015_set_power_state() function call unimplemented function __pm_runtime_suspend() from pm_runtime_put_autosuspend() if CONFIG_PM is not set. In case of CONFIG_PM is not set: __pm_runtime_suspend() returns -ENOSYS, so ads1015_read_raw() failed because ads1015_set_power_state() returns an error. If CONFIG_PM is disabled, there is no need to start/stop conversion. Fix it by adding return 0 function variant if CONFIG_PM is not set. Signed-off-by: Maxim Kochetkov <fido_max@inbox.ru> Fixes: ecc24e72f437 ("iio: adc: Add TI ADS1015 ADC driver support") Tested-by: Maxim Kiselev <bigunclemax@gmail.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- drivers/iio/adc/ti-ads1015.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/iio/adc/ti-ads1015.c b/drivers/iio/adc/ti-ads1015.c index 6a114dcb4a3a..dc8d859e4b92 100644 --- a/drivers/iio/adc/ti-ads1015.c +++ b/drivers/iio/adc/ti-ads1015.c @@ -312,6 +312,7 @@ static const struct iio_chan_spec ads1115_channels[] = { IIO_CHAN_SOFT_TIMESTAMP(ADS1015_TIMESTAMP), }; +#ifdef CONFIG_PM static int ads1015_set_power_state(struct ads1015_data *data, bool on) { int ret; @@ -329,6 +330,15 @@ static int ads1015_set_power_state(struct ads1015_data *data, bool on) return ret < 0 ? ret : 0; } +#else /* !CONFIG_PM */ + +static int ads1015_set_power_state(struct ads1015_data *data, bool on) +{ + return 0; +} + +#endif /* !CONFIG_PM */ + static int ads1015_get_adc_result(struct ads1015_data *data, int chan, int *val) { -- 2.25.1