From: Jon Hunter <jonathanh@nvidia.com>
To: Navid Emamdoost <navid.emamdoost@gmail.com>,
Laxman Dewangan <ldewangan@nvidia.com>,
Dan Williams <dan.j.williams@intel.com>,
Vinod Koul <vkoul@kernel.org>,
Thierry Reding <thierry.reding@gmail.com>,
<dmaengine@vger.kernel.org>, <linux-tegra@vger.kernel.org>,
<linux-kernel@vger.kernel.org>
Cc: <emamd001@umn.edu>, <wu000273@umn.edu>, <kjlu@umn.edu>,
<smccaman@umn.edu>
Subject: Re: [PATCH] dmaengine: tegra210-adma: fix pm_runtime_get_sync failure
Date: Thu, 4 Jun 2020 18:43:23 +0100 [thread overview]
Message-ID: <eb3e65fa-0ab6-a448-e5c8-e95561b6e4e9@nvidia.com> (raw)
In-Reply-To: <20200603183845.91054-1-navid.emamdoost@gmail.com>
On 03/06/2020 19:38, Navid Emamdoost wrote:
> Calling pm_runtime_get_sync increments the counter even in case of
> failure, causing incorrect ref count. Call pm_runtime_put if
> pm_runtime_get_sync fails.
>
> Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com>
> ---
> drivers/dma/tegra210-adma.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/dma/tegra210-adma.c b/drivers/dma/tegra210-adma.c
> index c4ce5dfb149b..87f2a1bed3aa 100644
> --- a/drivers/dma/tegra210-adma.c
> +++ b/drivers/dma/tegra210-adma.c
> @@ -869,8 +869,10 @@ static int tegra_adma_probe(struct platform_device *pdev)
> pm_runtime_enable(&pdev->dev);
>
> ret = pm_runtime_get_sync(&pdev->dev);
> - if (ret < 0)
> + if (ret < 0) {
> + pm_runtime_put_sync(&pdev->dev);
> goto rpm_disable;
> + }
I would prefer it if you did not add the pm_runtime_put_sync() call here
because there is already one in the error path that can be used.
Jon
--
nvpublic
next prev parent reply other threads:[~2020-06-04 17:43 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-03 18:38 [PATCH] dmaengine: tegra210-adma: fix pm_runtime_get_sync failure Navid Emamdoost
2020-06-04 17:43 ` Jon Hunter [this message]
-- strict thread matches above, loose matches on Subject: below --
2020-06-03 18:41 Navid Emamdoost
2020-06-04 17:45 ` Jon Hunter
2020-06-04 17:48 ` Navid Emamdoost
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