From: Liang He windhl@126.com
stable inclusion from stable-v5.10.134 commit 36f1d9c607f9457e2d8ff26eb96eb40db74b92fd category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I5ZVR7
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit 02c87df2480ac855d88ee308ce3fa857d9bd55a8 ]
In dcss_dev_create() and dcss_dev_destroy(), we should call of_node_put() in fail path or before the dcss's destroy as of_graph_get_port_by_id() has increased the refcount.
Fixes: 9021c317b770 ("drm/imx: Add initial support for DCSS on iMX8MQ") Signed-off-by: Liang He windhl@126.com Reviewed-by: Laurentiu Palcu laurentiu.palcu@oss.nxp.com Signed-off-by: Laurentiu Palcu laurentiu.palcu@oss.nxp.com Link: https://patchwork.freedesktop.org/patch/msgid/20220714081337.374761-1-windhl... Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com Reviewed-by: Wei Li liwei391@huawei.com --- drivers/gpu/drm/imx/dcss/dcss-dev.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/imx/dcss/dcss-dev.c b/drivers/gpu/drm/imx/dcss/dcss-dev.c index c849533ca83e..3f5750cc2673 100644 --- a/drivers/gpu/drm/imx/dcss/dcss-dev.c +++ b/drivers/gpu/drm/imx/dcss/dcss-dev.c @@ -207,6 +207,7 @@ struct dcss_dev *dcss_dev_create(struct device *dev, bool hdmi_output)
ret = dcss_submodules_init(dcss); if (ret) { + of_node_put(dcss->of_port); dev_err(dev, "submodules initialization failed\n"); goto clks_err; } @@ -237,6 +238,8 @@ void dcss_dev_destroy(struct dcss_dev *dcss) dcss_clocks_disable(dcss); }
+ of_node_put(dcss->of_port); + pm_runtime_disable(dcss->dev);
dcss_submodules_stop(dcss);