[PATCH] drm/msm/a6xx: Fix refcount leak in a6xx_gpu_init

From: Miaoqian Lin <linmq006@gmail.com>
To: Rob Clark <robdclark@gmail.com>, Sean Paul <sean@poorly.run>,
	Abhinav Kumar <quic_abhinavk@quicinc.com>,
	David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
	Akhil P Oommen <quic_akhilpo@quicinc.com>,
	Dmitry Baryshkov <dmitry.baryshkov@linaro.org>,
	Jonathan Marek <jonathan@marek.ca>,
	Jordan Crouse <jordan@cosmicpenguin.net>,
	linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org,
	freedreno@lists.freedesktop.org, linux-kernel@vger.kernel.org
Cc: linmq006@gmail.com
Subject: [PATCH] drm/msm/a6xx: Fix refcount leak in a6xx_gpu_init
Date: Thu, 12 May 2022 16:19:50 +0400	[thread overview]
Message-ID: <20220512121955.56937-1-linmq006@gmail.com> (raw)

of_parse_phandle() returns a node pointer with refcount
incremented, we should use of_node_put() on it when not need anymore.

a6xx_gmu_init() passes the node to of_find_device_by_node()
and of_dma_configure(), of_find_device_by_node() will takes its
reference, of_dma_configure() doesn't need the node after usage.

Add missing of_node_put() to avoid refcount leak.

Fixes: 4b565ca5a2cb ("drm/msm: Add A6XX device support")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
---
 drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
index ccc4fcf7a630..a8f6d73197b1 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
@@ -1919,6 +1919,7 @@ struct msm_gpu *a6xx_gpu_init(struct drm_device *dev)
 	BUG_ON(!node);
 
 	ret = a6xx_gmu_init(a6xx_gpu, node);
+	of_node_put(node);
 	if (ret) {
 		a6xx_destroy(&(a6xx_gpu->base.base));
 		return ERR_PTR(ret);
-- 
2.25.1

