[PATCH v1 1/2] media: hi846: fix usage of pm_runtime_get_if_in_use()

[Martin Kepplinger]

pm_runtime_get_if_in_use() does not only return nonzero values when
the device is in use, it can return a negative errno too.

And especially during resuming from system suspend, when runtime pm
is not yet up again, this can very well happen. And in such a case
the subsequent pm_runtime_put() call would result in a refcount underflow!

Fix it by correctly using pm_runtime_get_if_in_use().

Signed-off-by: Martin Kepplinger <martin.kepplinger@xxxxxxx>
---
 drivers/media/i2c/hi846.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/i2c/hi846.c b/drivers/media/i2c/hi846.c
index 5b5ea5425e984..0b0eda2e223cd 100644
--- a/drivers/media/i2c/hi846.c
+++ b/drivers/media/i2c/hi846.c
@@ -1544,7 +1544,7 @@ static int hi846_set_ctrl(struct v4l2_ctrl *ctrl)
 					 exposure_max);
 	}
 
-	if (!pm_runtime_get_if_in_use(&client->dev))
+	if (pm_runtime_get_if_in_use(&client->dev) <= 0)
 		return 0;
 
 	switch (ctrl->id) {
-- 
2.30.2