linux-kernel - Re: [PATCH] bus: mhi: pci-generic: Add missing 'pci_disable_pcie_error

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Date:   Sat, 12 Jun 2021 12:36:38 +0530
From:   Manivannan Sadhasivam <mani@...nel.org>
To:     Christophe JAILLET <christophe.jaillet@...adoo.fr>
Cc:     hemantk@...eaurora.org, loic.poulain@...aro.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org
Subject: Re: [PATCH] bus: mhi: pci-generic: Add missing
 'pci_disable_pcie_error_reporting()' calls

On Fri, Jun 11, 2021 at 11:03:50PM +0200, Christophe JAILLET wrote:
> If an error occurs after a 'pci_enable_pcie_error_reporting()' call, it
> must be undone by a corresponding 'pci_disable_pcie_error_reporting()'
> call
> 
> Add the missing call in the error handling path of the probe and in the
> remove function.
> 
> Fixes: b012ee6bfe2a ("mhi: pci_generic: Add PCI error handlers")
> Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>

Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>

Thanks,
Mani

> ---
>  drivers/bus/mhi/pci_generic.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/bus/mhi/pci_generic.c b/drivers/bus/mhi/pci_generic.c
> index 7c810f02a2ef..d84b74396c6a 100644
> --- a/drivers/bus/mhi/pci_generic.c
> +++ b/drivers/bus/mhi/pci_generic.c
> @@ -665,7 +665,7 @@ static int mhi_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
>  
>  	err = mhi_register_controller(mhi_cntrl, mhi_cntrl_config);
>  	if (err)
> -		return err;
> +		goto err_disable_reporting;
>  
>  	/* MHI bus does not power up the controller by default */
>  	err = mhi_prepare_for_power_up(mhi_cntrl);
> @@ -699,6 +699,8 @@ static int mhi_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
>  	mhi_unprepare_after_power_down(mhi_cntrl);
>  err_unregister:
>  	mhi_unregister_controller(mhi_cntrl);
> +err_disable_reporting:
> +	pci_disable_pcie_error_reporting(pdev);
>  
>  	return err;
>  }
> @@ -721,6 +723,7 @@ static void mhi_pci_remove(struct pci_dev *pdev)
>  		pm_runtime_get_noresume(&pdev->dev);
>  
>  	mhi_unregister_controller(mhi_cntrl);
> +	pci_disable_pcie_error_reporting(pdev);
>  }
>  
>  static void mhi_pci_shutdown(struct pci_dev *pdev)
> -- 
> 2.30.2
>