[PATCH] [v2] hwrng: ks-sa - Fix runtime PM imbalance on error

[Dinghao Liu]

pm_runtime_get_sync() increments the runtime PM usage counter even
the call returns an error code. Thus a pairing decrement is needed
on the error handling path to keep the counter balanced.

Signed-off-by: Dinghao Liu <dinghao.liu@xxxxxxxxxx>
---

Changelog:

v2: - Use pm_runtime_put_noidle() instead of pm_runtime_put_sync().
---
 drivers/char/hw_random/ks-sa-rng.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/char/hw_random/ks-sa-rng.c b/drivers/char/hw_random/ks-sa-rng.c
index e2330e757f1f..001617033d6a 100644
--- a/drivers/char/hw_random/ks-sa-rng.c
+++ b/drivers/char/hw_random/ks-sa-rng.c
@@ -244,6 +244,7 @@ static int ks_sa_rng_probe(struct platform_device *pdev)
 	ret = pm_runtime_get_sync(dev);
 	if (ret < 0) {
 		dev_err(dev, "Failed to enable SA power-domain\n");
+		pm_runtime_put_noidle(dev);
 		pm_runtime_disable(dev);
 		return ret;
 	}
-- 
2.17.1