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From: Sasha Levin <>
Cc: Dinghao Liu <>,
	Alexander Sverdlin <>,
	Herbert Xu <>,
	Sasha Levin <>,
Subject: [PATCH AUTOSEL 5.4 05/24] hwrng: ks-sa - Fix runtime PM imbalance on error
Date: Tue, 23 Jun 2020 13:35:40 -0400
Message-ID: <> (raw)
In-Reply-To: <>

From: Dinghao Liu <>

[ 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 <>
Reviewed-by: Alexander Sverdlin <>
Signed-off-by: Herbert Xu <>
Signed-off-by: Sasha Levin <>
 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 a67430010aa68..5c7d3dfcfdd04 100644
--- a/drivers/char/hw_random/ks-sa-rng.c
+++ b/drivers/char/hw_random/ks-sa-rng.c
@@ -208,6 +208,7 @@ 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);
 		return ret;

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