From: Jon Hunter <jonathanh@nvidia.com>
To: Dinghao Liu <dinghao.liu@zju.edu.cn>, <kjlu@umn.edu>
Cc: Laxman Dewangan <ldewangan@nvidia.com>,
Vinod Koul <vkoul@kernel.org>,
"Dan Williams" <dan.j.williams@intel.com>,
Thierry Reding <thierry.reding@gmail.com>,
<dmaengine@vger.kernel.org>, <linux-tegra@vger.kernel.org>,
<linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] dmaengine: tegra210-adma: Fix runtime PM imbalance on error
Date: Fri, 22 May 2020 11:43:59 +0100 [thread overview]
Message-ID: <967c17d2-6b57-27f0-7762-cd0835caaec9@nvidia.com> (raw)
In-Reply-To: <20200522075846.30706-1-dinghao.liu@zju.edu.cn>
On 22/05/2020 08:58, Dinghao Liu wrote:
> pm_runtime_get_sync() increments the runtime PM usage counter even
> when it 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>
> ---
> drivers/dma/tegra210-adma.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/dma/tegra210-adma.c b/drivers/dma/tegra210-adma.c
> index c4ce5dfb149b..803e1f4d5dac 100644
> --- a/drivers/dma/tegra210-adma.c
> +++ b/drivers/dma/tegra210-adma.c
> @@ -658,6 +658,7 @@ static int tegra_adma_alloc_chan_resources(struct dma_chan *dc)
>
> ret = pm_runtime_get_sync(tdc2dev(tdc));
> if (ret < 0) {
> + pm_runtime_put_sync(tdc2dev(tdc));
> free_irq(tdc->irq, tdc);
> return ret;
> }
>
There is another place in probe that needs to be fixed as well. Can you
correct this while you are at it?
Thanks
Jon
--
nvpublic
next prev parent reply other threads:[~2020-05-22 10:44 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-22 7:58 [PATCH] dmaengine: tegra210-adma: Fix runtime PM imbalance on error Dinghao Liu
2020-05-22 10:43 ` Jon Hunter [this message]
2020-05-22 10:57 ` dinghao.liu
2020-05-22 11:27 ` Jon Hunter
2020-05-22 11:32 ` dinghao.liu
-- strict thread matches above, loose matches on Subject: below --
2020-05-21 8:05 Dinghao Liu
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