From: "Sverdlin, Alexander (Nokia - DE/Ulm)" <alexander.sverdlin@nokia.com>
To: "dinghao.liu@zju.edu.cn" <dinghao.liu@zju.edu.cn>,
"kjlu@umn.edu" <kjlu@umn.edu>
Cc: "mpm@selenic.com" <mpm@selenic.com>,
"gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>,
"herbert@gondor.apana.org.au" <herbert@gondor.apana.org.au>,
"ben.dooks@codethink.co.uk" <ben.dooks@codethink.co.uk>,
"kstewart@linuxfoundation.org" <kstewart@linuxfoundation.org>,
"arnd@arndb.de" <arnd@arndb.de>,
"tglx@linutronix.de" <tglx@linutronix.de>,
"yuehaibing@huawei.com" <yuehaibing@huawei.com>,
"linux-crypto@vger.kernel.org" <linux-crypto@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] [v2] hwrng: ks-sa - Fix runtime PM imbalance on error
Date: Thu, 28 May 2020 09:06:03 +0000 [thread overview]
Message-ID: <8592887a502e174b076f16846704fac43885aa5b.camel@nokia.com> (raw)
In-Reply-To: <20200528072106.5191-1-dinghao.liu@zju.edu.cn>
Hello Dinghao,
On Thu, 2020-05-28 at 15:21 +0800, Dinghao Liu wrote:
> 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>
> ---
>
> 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;
> }
--
Alexander Sverdlin.
next prev parent reply other threads:[~2020-05-28 9:06 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-28 7:21 [PATCH] [v2] hwrng: ks-sa - Fix runtime PM imbalance on error Dinghao Liu
2020-05-28 9:06 ` Sverdlin, Alexander (Nokia - DE/Ulm) [this message]
2020-06-12 6:46 ` Herbert Xu
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