linux-kernel - Re: [PATCH v3] i2c: fix reference leak in MP2 PCI device

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Message-ID: <jlvcp2cb2cpdjzkfet5nosusjuvbzvil3zf7csbdfjan3pkidn@jdrneilgrmz7>
Date: Thu, 23 Oct 2025 12:58:49 +0200
From: Andi Shyti <andi.shyti@...nel.org>
To: Ma Ke <make24@...as.ac.cn>
Cc: syniurge@...il.com, shyam-sundar.s-k@....com, wsa@...nel.org, 
	linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org, akpm@...ux-foundation.org, 
	stable@...r.kernel.org
Subject: Re: [PATCH v3] i2c: fix reference leak in MP2 PCI device

Hi,

I'm sorry I didn't follow up on your last comment. Thanks a lot
for resending it.

...

> diff --git a/drivers/i2c/busses/i2c-amd-mp2-pci.c b/drivers/i2c/busses/i2c-amd-mp2-pci.c
> index ef7370d3dbea..60edbabc2986 100644
> --- a/drivers/i2c/busses/i2c-amd-mp2-pci.c
> +++ b/drivers/i2c/busses/i2c-amd-mp2-pci.c
> @@ -458,13 +458,16 @@ struct amd_mp2_dev *amd_mp2_find_device(void)
>  {
>  	struct device *dev;
>  	struct pci_dev *pci_dev;
> +	struct amd_mp2_dev *mp2_dev;
>  
>  	dev = driver_find_next_device(&amd_mp2_pci_driver.driver, NULL);
>  	if (!dev)
>  		return NULL;
>  
>  	pci_dev = to_pci_dev(dev);
> -	return (struct amd_mp2_dev *)pci_get_drvdata(pci_dev);
> +	mp2_dev = (struct amd_mp2_dev *)pci_get_drvdata(pci_dev);
> +	put_device(dev);
> +	return mp2_dev;

I still hold the same opinion, but, it's anyway a small change
and the difference is trivial.

Applied to i2c/i2c-host-fixes. I will include this patch in the
next week's pull request because I want to keep it a bit longer
for testing.

Thanks,
Andi

>  }
>  EXPORT_SYMBOL_GPL(amd_mp2_find_device);