[PATCH 2/3] iio: accel: kxsd9: modernize runtime PM in read_raw

[Biren Pandya <birenpandya@gmail.com>]

Replace the legacy pm_runtime_get_sync() call with the modern
pm_runtime_resume_and_get() in kxsd9_read_raw().

If the resume fails, we now correctly abort the read instead of
carrying on and reading garbage data from the sleeping hardware.

Suggested-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Biren Pandya <birenpandya@gmail.com>
---
 drivers/iio/accel/kxsd9.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/iio/accel/kxsd9.c b/drivers/iio/accel/kxsd9.c
index b3acb20441d86..680d43135e617 100644
--- a/drivers/iio/accel/kxsd9.c
+++ b/drivers/iio/accel/kxsd9.c
@@ -164,13 +164,15 @@ static int kxsd9_read_raw(struct iio_dev *indio_dev,
 			  struct iio_chan_spec const *chan,
 			  int *val, int *val2, long mask)
 {
-	int ret = -EINVAL;
 	struct kxsd9_state *st = iio_priv(indio_dev);
 	unsigned int regval;
 	__be16 raw_val;
 	u16 nval;
+	int ret;
 
-	pm_runtime_get_sync(st->dev);
+	ret = pm_runtime_resume_and_get(st->dev);
+	if (ret < 0)
+		return ret;
 
 	switch (mask) {
 	case IIO_CHAN_INFO_RAW:
@@ -199,6 +201,9 @@ static int kxsd9_read_raw(struct iio_dev *indio_dev,
 		*val2 = kxsd9_micro_scales[regval & KXSD9_CTRL_C_FS_MASK];
 		ret = IIO_VAL_INT_PLUS_MICRO;
 		break;
+	default:
+		ret = -EINVAL;
+		break;
 	}
 
 error_ret:
-- 
2.50.1 (Apple Git-155)