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iio: adc: ti-ads1015: don't return invalid value from buffer setup callbacks

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pm_runtime_get_sync() and pm_runtime_put_autosuspend() return 0 on
success, 1 if the device's runtime PM status was already requested status
or error code on failure.  So a positive return value doesn't indicate an
error condition.

However, any non-zero return values from buffer preenable and postdisable
callbacks are recognized as an error and this driver reuses the return
value from pm_runtime_get_sync() and pm_runtime_put_autosuspend() in
these callbacks.  This change fixes the false error detections.

Cc: Daniel Baluta <daniel.baluta@gmail.com>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Akinobu Mita 2017-07-21 00:24:21 +09:00 committed by Jonathan Cameron
parent 73e3e3fc50
commit a6fe5e52d5
1 changed files with 1 additions and 1 deletions
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2
drivers/iio/adc/ti-ads1015.c
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@ -235,7 +235,7 @@ static int ads1015_set_power_state(struct ads1015_data *data, bool on)
ret = pm_runtime_put_autosuspend(dev);
}
return ret;
return ret < 0 ? ret : 0;
}
static