linux-kernel - Re: [PATCH] platform/x86/amd/pmf: Fix missing error code in amd_pmf_init_smart

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Date: Mon, 26 Feb 2024 16:53:50 +0200 (EET)
From: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
To: Harshit Mogalapalli <harshit.m.mogalapalli@...cle.com>
cc: Shyam Sundar S K <Shyam-sundar.S-k@....com>, 
    Hans de Goede <hdegoede@...hat.com>, 
    Mario Limonciello <mario.limonciello@....com>, 
    platform-driver-x86@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>, 
    kernel-janitors@...r.kernel.org, dan.carpenter@...aro.org
Subject: Re: [PATCH] platform/x86/amd/pmf: Fix missing error code in
 amd_pmf_init_smart_pc()

On Mon, 26 Feb 2024, Harshit Mogalapalli wrote:

> On the error path, assign -ENOMEM to ret when memory allocation of
> "dev->prev_data" fails.
> 
> Fixes: e70961505808 ("platform/x86/amd/pmf: Fixup error handling for amd_pmf_init_smart_pc()")
> Signed-off-by: Harshit Mogalapalli <harshit.m.mogalapalli@...cle.com>
> ---
> This is based on static analysis with smatch, only compile tested
> ---
>  drivers/platform/x86/amd/pmf/tee-if.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/platform/x86/amd/pmf/tee-if.c b/drivers/platform/x86/amd/pmf/tee-if.c
> index 8527dca9cf56..dcbe8f85e122 100644
> --- a/drivers/platform/x86/amd/pmf/tee-if.c
> +++ b/drivers/platform/x86/amd/pmf/tee-if.c
> @@ -458,8 +458,10 @@ int amd_pmf_init_smart_pc(struct amd_pmf_dev *dev)
>  	amd_pmf_hex_dump_pb(dev);
>  
>  	dev->prev_data = kzalloc(sizeof(*dev->prev_data), GFP_KERNEL);
> -	if (!dev->prev_data)
> +	if (!dev->prev_data) {
> +		ret = -ENOMEM;
>  		goto error;
> +	}
>  
>  	ret = amd_pmf_start_policy_engine(dev);
>  	if (ret)
> 

Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>

-- 
 i.