linux-kernel - [PATCH v2] Input: synaptics_i2c - guard polling restart in resume

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Message-ID: <20260121063738.799967-1-ii4gsp@gmail.com>
Date: Wed, 21 Jan 2026 15:37:38 +0900
From: Minseong Kim <ii4gsp@...il.com>
To: Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc: linux-input@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	stable@...r.kernel.org,
	Minseong Kim <ii4gsp@...il.com>
Subject: [PATCH v2] Input: synaptics_i2c - guard polling restart in resume

synaptics_i2c_resume() restarts delayed work unconditionally, even when
the input device is not opened. Guard the polling restart by taking the
input device mutex and checking input_device_enabled() before re-queuing
the delayed work.

Fixes: eef3e4cab72ea ("Input: add driver for Synaptics I2C touchpad")
Cc: stable@...r.kernel.org
Signed-off-by: Minseong Kim <ii4gsp@...il.com>
---
 drivers/input/mouse/synaptics_i2c.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/input/mouse/synaptics_i2c.c b/drivers/input/mouse/synaptics_i2c.c
index a0d707e47d93..fc65e28c1b31 100644
--- a/drivers/input/mouse/synaptics_i2c.c
+++ b/drivers/input/mouse/synaptics_i2c.c
@@ -615,13 +615,17 @@ static int synaptics_i2c_resume(struct device *dev)
 	int ret;
 	struct i2c_client *client = to_i2c_client(dev);
 	struct synaptics_i2c *touch = i2c_get_clientdata(client);
+	struct input_dev *input = touch->input;
 
 	ret = synaptics_i2c_reset_config(client);
 	if (ret)
 		return ret;
 
-	mod_delayed_work(system_wq, &touch->dwork,
+	mutex_lock(&input->mutex);
+	if (input_device_enabled(input))
+		mod_delayed_work(system_wq, &touch->dwork,
 				msecs_to_jiffies(NO_DATA_SLEEP_MSECS));
+	mutex_unlock(&input->mutex);
 
 	return 0;
 }
-- 
2.48.1