HID: logitech-hidpp: do all FF cleanup in hidpp_ff_destroy()

All of the FF-related resources belong to corresponding FF device, so
they should be freed as a part of hidpp_ff_destroy() to avoid
potential race condidions.

Fixes: ff21a635dd1a ("HID: logitech-hidpp: Force feedback support for the Logitech G920")
Suggested-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Cc: Jiri Kosina <jikos@kernel.org>
Cc: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Cc: Henrik Rydberg <rydberg@bitmath.org>
Cc: Pierre-Loup A. Griffais <pgriffais@valvesoftware.com>
Cc: Austin Palmer <austinp@valvesoftware.com>
Cc: linux-input@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: stable@vger.kernel.org # 5.2+
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>

diff --git a/drivers/hid/hid-logitech-hidpp.c b/drivers/hid/hid-logitech-hidpp.c
index 6e669eb7dc69e241cac6a836d62c2466f8278c70..8e91e2f06cb4fc8574e08ca3c8ddd2b4595767e3 100644 (file)
--- a/drivers/hid/hid-logitech-hidpp.c
+++ b/drivers/hid/hid-logitech-hidpp.c
@@ -2078,7 +2078,12 @@ static DEVICE_ATTR(range, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH, hidpp
 static void hidpp_ff_destroy(struct ff_device *ff)
 {
        struct hidpp_ff_private_data *data = ff->private;
+       struct hid_device *hid = data->hidpp->hid_dev;
 
+       hid_info(hid, "Unloading HID++ force feedback.\n");
+
+       device_remove_file(&hid->dev, &dev_attr_range);
+       destroy_workqueue(data->wq);
        kfree(data->effect_ids);
 }
 
@@ -2170,31 +2175,6 @@ static int hidpp_ff_init(struct hidpp_device *hidpp,
        return 0;
 }
 
-static int hidpp_ff_deinit(struct hid_device *hid)
-{
-       struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list);
-       struct input_dev *dev = hidinput->input;
-       struct hidpp_ff_private_data *data;
-
-       if (!dev) {
-               hid_err(hid, "Struct input_dev not found!\n");
-               return -EINVAL;
-       }
-
-       hid_info(hid, "Unloading HID++ force feedback.\n");
-       data = dev->ff->private;
-       if (!data) {
-               hid_err(hid, "Private data not found!\n");
-               return -EINVAL;
-       }
-
-       destroy_workqueue(data->wq);
-       device_remove_file(&hid->dev, &dev_attr_range);
-
-       return 0;
-}
-
-
 /* ************************************************************************** */
 /*                                                                            */
 /* Device Support                                                             */
@@ -3713,9 +3693,6 @@ static void hidpp_remove(struct hid_device *hdev)
 
        sysfs_remove_group(&hdev->dev.kobj, &ps_attribute_group);
 
-       if (hidpp->quirks & HIDPP_QUIRK_CLASS_G920)
-               hidpp_ff_deinit(hdev);
-
        hid_hw_stop(hdev);
        cancel_work_sync(&hidpp->work);
        mutex_destroy(&hidpp->send_mutex);