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From: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
To: Dinghao Liu <dinghao.liu@zju.edu.cn>
Cc: kjlu@umn.edu, Andy Gross <agross@kernel.org>,
	Bjorn Andersson <bjorn.andersson@linaro.org>,
	Stanimir Varbanov <svarbanov@mm-sol.com>,
	Rob Herring <robh@kernel.org>,
	Bjorn Helgaas <bhelgaas@google.com>,
	linux-arm-msm@vger.kernel.org, linux-pci@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH] [v2] PCI: qcom: Fix runtime PM imbalance on error
Date: Tue, 7 Jul 2020 11:36:17 +0100
Message-ID: <20200707103617.GA14581@e121166-lin.cambridge.arm.com> (raw)
In-Reply-To: <20200707055000.9453-1-dinghao.liu@zju.edu.cn>

On Tue, Jul 07, 2020 at 01:50:00PM +0800, 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.
> 
> Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
> ---
> 
> Changelog:
> 
> v2: - Remove redundant brackets.
> ---
>  drivers/pci/controller/dwc/pcie-qcom.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)

Applied to pci/runtime-pm, thanks.

Lorenzo

> diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
> index 138e1a2d21cc..12abdfbff5ca 100644
> --- a/drivers/pci/controller/dwc/pcie-qcom.c
> +++ b/drivers/pci/controller/dwc/pcie-qcom.c
> @@ -1339,10 +1339,8 @@ static int qcom_pcie_probe(struct platform_device *pdev)
>  
>  	pm_runtime_enable(dev);
>  	ret = pm_runtime_get_sync(dev);
> -	if (ret < 0) {
> -		pm_runtime_disable(dev);
> -		return ret;
> -	}
> +	if (ret < 0)
> +		goto err_pm_runtime_put;
>  
>  	pci->dev = dev;
>  	pci->ops = &dw_pcie_ops;
> -- 
> 2.17.1
> 

      reply index

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-07  5:50 Dinghao Liu
2020-07-07 10:36 ` Lorenzo Pieralisi [this message]

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