linux-kernel - Re: [PATCH v2] drm/msm/adreno: Fix a reference leak in a6xx_gpu

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Message-ID: <7k3szb7kxuhyhir6t52aqwkfxah4ah4pa7vzbnqdl5sovatxqd@vbx33srndwso>
Date: Sat, 24 Jan 2026 17:56:20 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Felix Gu <ustc.gu@...il.com>
Cc: Rob Clark <robin.clark@....qualcomm.com>, Sean Paul <sean@...rly.run>,
        Konrad Dybcio <konradybcio@...nel.org>,
        Akhil P Oommen <akhilpo@....qualcomm.com>,
        Dmitry Baryshkov <lumag@...nel.org>,
        Abhinav Kumar <abhinav.kumar@...ux.dev>,
        Jessica Zhang <jesszhan0024@...il.com>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
        linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] drm/msm/adreno: Fix a reference leak in
 a6xx_gpu_init()

On Sat, Jan 24, 2026 at 03:34:23AM +0800, Felix Gu wrote:
> In a6xx_gpu_init(), node is obtained via of_parse_phandle().
> While there was a manual of_node_put() at the end of the
> common path, several early error returns would bypass this call,
> resulting in a reference leak.
> Fix this by using the __free(device_node) cleanup handler to
> release the reference when the variable goes out of scope.
> 
> Fixes: 5a903a44a984 ("drm/msm/a6xx: Introduce GMU wrapper support")
> Signed-off-by: Felix Gu <ustc.gu@...il.com>
> ---
> Changes in v2:
> - Explicitly add header file.
> - Link to v1: https://lore.kernel.org/r/20260124-a6xx_gpu-v1-1-fa0c8b2dcfb1@gmail.com
> ---
>  drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>


-- 
With best wishes
Dmitry