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

[ Upstream commit 95459261c9 ]

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>
5.4-rM2-2.2.x-imx-squashed
Dinghao Liu 2020-05-28 15:21:04 +08:00 committed by Sasha Levin
parent b8403f7e45
commit 07b8b2d463
1 changed files with 1 additions and 0 deletions
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drivers/char/hw_random/ks-sa-rng.c
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@ -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);
pm_runtime_disable(dev);
return ret;
}