From 1f63c02277c76cc24d6acecdc3fb7b1575cbfbf7 Mon Sep 17 00:00:00 2001
From: Dinghao Liu <dinghao.liu@zju.edu.cn>
Date: Thu, 28 May 2020 15:21:04 +0800
Subject: [PATCH] hwrng: ks-sa - Fix runtime PM imbalance on error

[ Upstream commit 95459261c99f1621d90bc628c2a48e60b7cf9a88 ]

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@zju.edu.cn>
Reviewed-by: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 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 62c6696c1dbd..b6d7db362b21 100644
--- a/drivers/char/hw_random/ks-sa-rng.c
+++ b/drivers/char/hw_random/ks-sa-rng.c
@@ -216,6 +216,7 @@ 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;
 	}