From: Wentao Liang <vulab@iscas.ac.cn>
To: airlied@gmail.com
Cc: architt@codeaurora.org, bcm-kernel-feedback-list@broadcom.com,
dri-devel@lists.freedesktop.org, eric@anholt.net,
florian.fainelli@broadcom.com, jesszhan0024@gmail.com,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org,
linux-rpi-kernel@lists.infradead.org,
maarten.lankhorst@linux.intel.com, mripard@kernel.org,
neil.armstrong@linaro.org, simona@ffwll.ch, treding@nvidia.com,
tzimmermann@suse.de, Wentao Liang <vulab@iscas.ac.cn>,
stable@vger.kernel.org
Subject: [PATCH] drm/panel: Fix node reference leak in rpi_touchscreen_probe()
Date: Wed, 16 Sep 2026 18:05:49 +0000 [thread overview]
Message-ID: <20260916180549.2090497-1-vulab@iscas.ac.cn> (raw)
of_graph_get_remote_port() returns a reference to the remote port
node. On the success path that reference is passed to the registered
DSI device and released with it, but if mipi_dsi_device_register_full()
fails the reference is never dropped. Release it on the error path.
Fixes: 2f733d6194bd ("drm/panel: Add support for the Raspberry Pi 7" Touchscreen.")
Cc: stable@vger.kernel.org
Signed-off-by: Wentao Liang <vulab@iscas.ac.cn>
---
drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c b/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c
index dc4bb8ad9131..c14776561623 100644
--- a/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c
+++ b/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c
@@ -428,6 +428,7 @@ static int rpi_touchscreen_probe(struct i2c_client *i2c)
if (IS_ERR(ts->dsi)) {
dev_err(dev, "DSI device registration failed: %ld\n",
PTR_ERR(ts->dsi));
+ of_node_put(info.node);
return PTR_ERR(ts->dsi);
}
--
2.34.1
next reply other threads:[~2026-09-16 18:06 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-16 18:05 Wentao Liang [this message]
2026-09-24 13:36 ` [PATCH] drm/panel: Fix node reference leak in rpi_touchscreen_probe() neil.armstrong
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