linux-kernel - Re: [PATCH] platform/x86/amd: Fix refcount leak in amd_pmc

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Message-ID: <c4842482-7be0-0042-b476-0f21125c79c2@redhat.com>
Date:   Thu, 12 Jan 2023 20:05:02 +0100
From:   Hans de Goede <hdegoede@...hat.com>
To:     Miaoqian Lin <linmq006@...il.com>,
        Shyam Sundar S K <Shyam-sundar.S-k@....com>,
        Mark Gross <markgross@...nel.org>,
        Sanket Goswami <Sanket.Goswami@....com>,
        Mario Limonciello <mario.limonciello@....com>,
        platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] platform/x86/amd: Fix refcount leak in amd_pmc_probe

Hi,

On 12/29/22 08:25, Miaoqian Lin wrote:
> pci_get_domain_bus_and_slot() takes reference, the caller should release
> the reference by calling pci_dev_put() after use. Call pci_dev_put() in
> the error path to fix this.
> 
> Fixes: 3d7d407dfb05 ("platform/x86: amd-pmc: Add support for AMD Spill to DRAM STB feature")
> Signed-off-by: Miaoqian Lin <linmq006@...il.com>

Thank you for your patch, I've applied this patch to my fixes
branch:
https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git/log/?h=fixes

Note it will show up in my fixes branch once I've pushed my
local branch there, which might take a while.

I will include this patch in my next fixes pull-req to Linus
for the current kernel development cycle.

Regards,

Hans


> ---
>  drivers/platform/x86/amd/pmc.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/platform/x86/amd/pmc.c b/drivers/platform/x86/amd/pmc.c
> index 439d282aafd1..8d924986381b 100644
> --- a/drivers/platform/x86/amd/pmc.c
> +++ b/drivers/platform/x86/amd/pmc.c
> @@ -932,7 +932,7 @@ static int amd_pmc_probe(struct platform_device *pdev)
>  	if (enable_stb && (dev->cpu_id == AMD_CPU_ID_YC || dev->cpu_id == AMD_CPU_ID_CB)) {
>  		err = amd_pmc_s2d_init(dev);
>  		if (err)
> -			return err;
> +			goto err_pci_dev_put;
>  	}
>  
>  	platform_set_drvdata(pdev, dev);