linux-kernel - Re: [PATCH] PCI: dwc: add missing free_irq() in ks_pcie_remove() and error path in ks_pcie

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Date:   Wed, 16 Nov 2022 10:34:24 +0800
From:   Ruan Jinjie <ruanjinjie@...wei.com>
To:     <lpieralisi@...nel.org>, <robh@...nel.org>, <kw@...ux.com>,
        <bhelgaas@...gle.com>, <Sergey.Semin@...kalelectronics.ru>,
        <mani@...nel.org>, <kishon@...com>, <naveennaidu479@...il.com>,
        <pali@...nel.org>, <ffclaire1224@...il.com>,
        <linux-pci@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] PCI: dwc: add missing free_irq() in ks_pcie_remove() and
 error path in ks_pcie_probe()

The fix has a problem, I will send v2 soon.

On 2022/11/16 10:21, ruanjinjie wrote:
> free_irq() is missing in ks_pcie_remove() and some cases of error
> in ks_pcie_probe(), fix that.
> 
> Fixes: 49229238ab47 ("PCI: keystone: Cleanup PHY handling")
> 
> Signed-off-by: ruanjinjie <ruanjinjie@...wei.com>
> ---
>  drivers/pci/controller/dwc/pci-keystone.c | 15 +++++++++++----
>  1 file changed, 11 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/pci/controller/dwc/pci-keystone.c b/drivers/pci/controller/dwc/pci-keystone.c
> index 78818853af9e..fc854ccaf155 100644
> --- a/drivers/pci/controller/dwc/pci-keystone.c
> +++ b/drivers/pci/controller/dwc/pci-keystone.c
> @@ -1179,12 +1179,16 @@ static int __init ks_pcie_probe(struct platform_device *pdev)
>  		num_lanes = 1;
>  
>  	phy = devm_kzalloc(dev, sizeof(*phy) * num_lanes, GFP_KERNEL);
> -	if (!phy)
> -		return -ENOMEM;
> +	if (!phy) {
> +		ret = -ENOMEM;
> +		goto free_irq;
> +	}
>  
>  	link = devm_kzalloc(dev, sizeof(*link) * num_lanes, GFP_KERNEL);
> -	if (!link)
> -		return -ENOMEM;
> +	if (!link) {
> +		ret = -ENOMEM;
> +		goto free_irq;
> +	}
>  
>  	for (i = 0; i < num_lanes; i++) {
>  		snprintf(name, sizeof(name), "pcie-phy%d", i);
> @@ -1300,6 +1304,8 @@ static int __init ks_pcie_probe(struct platform_device *pdev)
>  	while (--i >= 0 && link[i])
>  		device_link_del(link[i]);
>  
> +free_irq:
> +	free_irq(irq, ks_pcie);
>  	return ret;
>  }
>  
> @@ -1315,6 +1321,7 @@ static int __exit ks_pcie_remove(struct platform_device *pdev)
>  	ks_pcie_disable_phy(ks_pcie);
>  	while (num_lanes--)
>  		device_link_del(link[num_lanes]);
> +	free_irq(irq, ks_pcie);
>  
>  	return 0;
>  }