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Subject: Re: [PATCH] PCI: rcar: fix runtime pm imbalance on error
To:     Dinghao Liu <dinghao.liu@zju.edu.cn>, kjlu@umn.edu
Cc:     Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
        Rob Herring <robh@kernel.org>,
        Bjorn Helgaas <bhelgaas@google.com>, linux-pci@vger.kernel.org,
        linux-renesas-soc@vger.kernel.org, linux-kernel@vger.kernel.org
References: <20200520082228.26881-1-dinghao.liu@zju.edu.cn>
From:   Marek Vasut <marek.vasut@gmail.com>
Message-ID: <5cf73d31-33ab-b9ba-c9d5-faa3977484eb@gmail.com>
Date:   Sat, 6 Jun 2020 14:15:28 +0200
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On 5/20/20 10:22 AM, Dinghao Liu wrote:
> pm_runtime_get_sync() increments the runtime PM usage counter even
> it returns an error code. Thus a pairing decrement is needed on
> the error handling path to keep the counter balanced.

Sorry for the late reply.

> Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
> ---
>  drivers/pci/controller/pcie-rcar.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/pci/controller/pcie-rcar.c b/drivers/pci/controller/pcie-rcar.c
> index 759c6542c5c8..a9de65438051 100644
> --- a/drivers/pci/controller/pcie-rcar.c
> +++ b/drivers/pci/controller/pcie-rcar.c
> @@ -1207,9 +1207,8 @@ static int rcar_pcie_probe(struct platform_device *pdev)
>  	irq_dispose_mapping(pcie->msi.irq1);
>  
>  err_pm_put:

You might want to remove this label too.
I'm not runtime-pm expert to comment on the validity of this patch though.

> -	pm_runtime_put(dev);
> -
>  err_pm_disable:
> +	pm_runtime_put(dev);
>  	pm_runtime_disable(dev);
>  	pci_free_resource_list(&pcie->resources);
>  
>