linux-kernel - Re: [PATCH] i2c: thunderx: Add missed pci_release

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Date:   Sun, 22 Mar 2020 17:00:40 +0100
From:   Wolfram Sang <wsa@...-dreams.de>
To:     Chuhong Yuan <hslester96@...il.com>,
        Jan Glauber <jglauber@...ium.com>
Cc:     David Daney <david.daney@...ium.com>, linux-i2c@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] i2c: thunderx: Add missed pci_release_regions

On Fri, Dec 06, 2019 at 03:53:49PM +0800, Chuhong Yuan wrote:
> The driver forgets to call pci_release_regions() in probe failure
> and remove.
> Add the missed calls to fix it.
> 
> Signed-off-by: Chuhong Yuan <hslester96@...il.com>

Jan, any comment to this patch?

Chuhong Yang, please make sure you have a proper To-Header next time!

> ---
>  drivers/i2c/busses/i2c-thunderx-pcidrv.c | 19 ++++++++++++-------
>  1 file changed, 12 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/i2c/busses/i2c-thunderx-pcidrv.c b/drivers/i2c/busses/i2c-thunderx-pcidrv.c
> index 19f8eec38717..31f7e254e99f 100644
> --- a/drivers/i2c/busses/i2c-thunderx-pcidrv.c
> +++ b/drivers/i2c/busses/i2c-thunderx-pcidrv.c
> @@ -172,8 +172,10 @@ static int thunder_i2c_probe_pci(struct pci_dev *pdev,
>  		return ret;
>  
>  	i2c->twsi_base = pcim_iomap(pdev, 0, pci_resource_len(pdev, 0));
> -	if (!i2c->twsi_base)
> -		return -EINVAL;
> +	if (!i2c->twsi_base) {
> +		ret = -EINVAL;
> +		goto error_release_regions;
> +	}
>  
>  	thunder_i2c_clock_enable(dev, i2c);
>  	ret = device_property_read_u32(dev, "clock-frequency", &i2c->twsi_freq);
> @@ -189,16 +191,16 @@ static int thunder_i2c_probe_pci(struct pci_dev *pdev,
>  
>  	ret = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_MSIX);
>  	if (ret < 0)
> -		goto error;
> +		goto error_disable_clock;
>  
>  	ret = devm_request_irq(dev, pci_irq_vector(pdev, 0), octeon_i2c_isr, 0,
>  			       DRV_NAME, i2c);
>  	if (ret)
> -		goto error;
> +		goto error_disable_clock;
>  
>  	ret = octeon_i2c_init_lowlevel(i2c);
>  	if (ret)
> -		goto error;
> +		goto error_disable_clock;
>  
>  	octeon_i2c_set_clock(i2c);
>  
> @@ -214,7 +216,7 @@ static int thunder_i2c_probe_pci(struct pci_dev *pdev,
>  
>  	ret = i2c_add_adapter(&i2c->adap);
>  	if (ret)
> -		goto error;
> +		goto error_disable_clock;
>  
>  	dev_info(i2c->dev, "Probed. Set system clock to %u\n", i2c->sys_freq);
>  
> @@ -224,8 +226,10 @@ static int thunder_i2c_probe_pci(struct pci_dev *pdev,
>  
>  	return 0;
>  
> -error:
> +error_disable_clock:
>  	thunder_i2c_clock_disable(dev, i2c->clk);
> +error_release_regions:
> +	pci_release_regions(pdev);
>  	return ret;
>  }
>  
> @@ -236,6 +240,7 @@ static void thunder_i2c_remove_pci(struct pci_dev *pdev)
>  	thunder_i2c_smbus_remove(i2c);
>  	thunder_i2c_clock_disable(&pdev->dev, i2c->clk);
>  	i2c_del_adapter(&i2c->adap);
> +	pci_release_regions(pdev);
>  }
>  
>  static const struct pci_device_id thunder_i2c_pci_id_table[] = {
> -- 
> 2.24.0
> 

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