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: eef3e4c ("Input: add driver for Synaptics I2C touchpad")
Signed-off-by: Minseong Kim <ii4gsp@gmail.com>
Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/20260121063738.799967-1-ii4gsp@gmail.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Author: ii4gsp

drivers/input/mouse/synaptics_i2c.c

@@ -615,13 +615,16 @@ 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_dfl_wq, &touch->dwork,
-				msecs_to_jiffies(NO_DATA_SLEEP_MSECS));
+	guard(mutex)(&input->mutex);
+	if (input_device_enabled(input))
+		mod_delayed_work(system_dfl_wq, &touch->dwork,
+				 msecs_to_jiffies(NO_DATA_SLEEP_MSECS));
 
 	return 0;
 }