[PATCH 5.4 044/177] iio: gyro: fxas21002c: balance runtime power in error path

From: Greg Kroah-Hartman
Date: Mon May 31 2021 - 11:19:04 EST


From: Rui Miguel Silva <rui.silva@xxxxxxxxxx>

commit 2a54c8c9ebc2006bf72554afc84ffc67768979a0 upstream.

If we fail to read temperature or axis we need to decrement the
runtime pm reference count to trigger autosuspend.

Add the call to pm_put to do that in case of error.

Fixes: a0701b6263ae ("iio: gyro: add core driver for fxas21002c")
Suggested-by: Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx>
Signed-off-by: Rui Miguel Silva <rui.silva@xxxxxxxxxx>
Link: https://lore.kernel.org/linux-iio/CBBZA9T1OY9C.2611WSV49DV2G@arch-thunder/
Cc: <Stable@xxxxxxxxxxxxxxx>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/iio/gyro/fxas21002c_core.c | 2 ++
1 file changed, 2 insertions(+)

--- a/drivers/iio/gyro/fxas21002c_core.c
+++ b/drivers/iio/gyro/fxas21002c_core.c
@@ -333,6 +333,7 @@ static int fxas21002c_temp_get(struct fx
ret = regmap_field_read(data->regmap_fields[F_TEMP], &temp);
if (ret < 0) {
dev_err(dev, "failed to read temp: %d\n", ret);
+ fxas21002c_pm_put(data);
goto data_unlock;
}

@@ -366,6 +367,7 @@ static int fxas21002c_axis_get(struct fx
&axis_be, sizeof(axis_be));
if (ret < 0) {
dev_err(dev, "failed to read axis: %d: %d\n", index, ret);
+ fxas21002c_pm_put(data);
goto data_unlock;
}