[PATCH 5.4 051/215] iio: pressure: zpa2326: handle pm_runtime_get_sync failure

From: Greg Kroah-Hartman
Date: Mon Jul 20 2020 - 11:58:29 EST


From: Navid Emamdoost <navid.emamdoost@xxxxxxxxx>

commit d88de040e1df38414fc1e4380be9d0e997ab4d58 upstream.

Calling pm_runtime_get_sync increments the counter even in case of
failure, causing incorrect ref count. Call pm_runtime_put if
pm_runtime_get_sync fails.

Signed-off-by: Navid Emamdoost <navid.emamdoost@xxxxxxxxx>
Fixes: 03b262f2bbf4 ("iio:pressure: initial zpa2326 barometer support")
Cc: <Stable@xxxxxxxxxxxxxxx>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
drivers/iio/pressure/zpa2326.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/iio/pressure/zpa2326.c
+++ b/drivers/iio/pressure/zpa2326.c
@@ -664,8 +664,10 @@ static int zpa2326_resume(const struct i
int err;

err = pm_runtime_get_sync(indio_dev->dev.parent);
- if (err < 0)
+ if (err < 0) {
+ pm_runtime_put(indio_dev->dev.parent);
return err;
+ }

if (err > 0) {
/*