HID: Input: Add battery list cleanup with devm action

The batteries list (hdev->batteries) is not cleaned up during
hidinput_disconnect(), but struct hid_battery entries are allocated
with devm_kzalloc.
When a driver is unbound (e.g. during devicereprobe), devm frees those
entries while their list_head nodesremain dangling in hdev->batteries,
which persists across rebinds.

Link: https://lore.kernel.org/all/20260602011949.2825852-1-rafael@rcpassos.me/
Fixes: 4a58ae8 ("HID: input: Add support for multiple batteries per device")
Signed-off-by: Rafael Passos <rafael@rcpassos.me>
Acked-by: Lucas Zampieri <lcasmz54@gmail.com>
Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>

Author: auyer

drivers/hid/hid-input.c

@@ -519,6 +519,13 @@ static struct hid_battery *hidinput_find_battery(struct hid_device *dev,
 	return NULL;
 }
 
+static void hidinput_cleanup_battery(void *res)
+{
+	struct hid_battery *bat = res;
+
+	list_del(&bat->list);
+}
+
 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
 				  struct hid_field *field, bool is_percentage)
 {
@@ -610,6 +617,12 @@ static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
 
 	power_supply_powers(bat->ps, &dev->dev);
 	list_add_tail(&bat->list, &dev->batteries);
+
+	error = devm_add_action_or_reset(&dev->dev,
+					 hidinput_cleanup_battery, bat);
+	if (error)
+		return error;
+
 	return 0;
 
 err_free_name: