hwrng: ks-sa - Fix runtime PM imbalance on error

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>

diff --git a/drivers/char/hw_random/ks-sa-rng.c b/drivers/char/hw_random/ks-sa-rng.c
index e2330e757f1ff175d5b9aedaddb523a493b8e9f9..001617033d6a2bf053f3e1a3a824202a06fe6936 100644 (file)
--- 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;
        }