linux-kernel - Re: [PATCH] accel/amdxdna: Fix uninitialized return value

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Message-ID: <ab69ff44-14a5-4f65-a026-c08d9931c2c1@kernel.org>
Date: Fri, 24 Oct 2025 13:07:28 -0500
From: "Mario Limonciello (AMD) (kernel.org)" <superm1@...nel.org>
To: Lizhi Hou <lizhi.hou@....com>, ogabbay@...nel.org,
 quic_jhugo@...cinc.com, maciej.falkowski@...ux.intel.com,
 dri-devel@...ts.freedesktop.org
Cc: linux-kernel@...r.kernel.org, max.zhen@....com, sonal.santan@....com
Subject: Re: [PATCH] accel/amdxdna: Fix uninitialized return value



On 10/24/2025 11:55 AM, Lizhi Hou wrote:
> In aie2_get_hwctx_status() and aie2_query_ctx_status_array(), the
> functions could return an uninitialized value in some cases. Update them
> to always return 0. The amount of valid results is indicated by the
> returned buffer_size, element_size, and num_element fields.
> 
> Fixes: 2f509fe6a42c ("accel/amdxdna: Add ioctl DRM_IOCTL_AMDXDNA_GET_ARRAY")
> Signed-off-by: Lizhi Hou <lizhi.hou@....com>
Reviewed-by: Mario Limonciello (AMD) <superm1@...nel.org>> ---
>   drivers/accel/amdxdna/aie2_pci.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/accel/amdxdna/aie2_pci.c b/drivers/accel/amdxdna/aie2_pci.c
> index f48045318dc0..f1a8112b080f 100644
> --- a/drivers/accel/amdxdna/aie2_pci.c
> +++ b/drivers/accel/amdxdna/aie2_pci.c
> @@ -822,7 +822,7 @@ static int aie2_get_hwctx_status(struct amdxdna_client *client,
>   	}
>   
>   	args->buffer_size -= (u32)(array_args.buffer - args->buffer);
> -	return ret;
> +	return 0;
>   }
>   
>   static int aie2_get_info(struct amdxdna_client *client, struct amdxdna_drm_get_info *args)
> @@ -904,7 +904,7 @@ static int aie2_query_ctx_status_array(struct amdxdna_client *client,
>   	args->num_element = (u32)((array_args.buffer - args->buffer) /
>   				  args->element_size);
>   
> -	return ret;
> +	return 0;
>   }
>   
>   static int aie2_get_array(struct amdxdna_client *client,