HID: hid-steam: Fix cleanup in probe()

There are a number of issues in this code.  First of all if
steam_create_client_hid() fails then it leads to an error pointer
dereference when we call hid_destroy_device(steam->client_hdev).

Also there are a number of leaks.  hid_hw_stop() is not called if
hid_hw_open() fails for example.  And it doesn't call steam_unregister()
or hid_hw_close().

Fixes: 691ead1 ("HID: hid-steam: Clean up locking")
Signed-off-by: Dan Carpenter <[email protected]>
Reviewed-by: Vicki Pfau <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Benjamin Tissoires <[email protected]>

Author: Dan Carpenter

drivers/hid/hid-steam.c

@@ -1128,14 +1128,14 @@ static int steam_probe(struct hid_device *hdev,
 	 */
 	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_HIDRAW);
 	if (ret)
-		goto hid_hw_start_fail;
+		goto err_cancel_work;
 
 	ret = hid_hw_open(hdev);
 	if (ret) {
 		hid_err(hdev,
 			"%s:hid_hw_open\n",
 			__func__);
-		goto hid_hw_open_fail;
+		goto err_hw_stop;
 	}
 
 	if (steam->quirks & STEAM_QUIRK_WIRELESS) {
@@ -1151,33 +1151,37 @@ static int steam_probe(struct hid_device *hdev,
 			hid_err(hdev,
 				"%s:steam_register failed with error %d\n",
 				__func__, ret);
-			goto input_register_fail;
+			goto err_hw_close;
 		}
 	}
 
 	steam->client_hdev = steam_create_client_hid(hdev);
 	if (IS_ERR(steam->client_hdev)) {
 		ret = PTR_ERR(steam->client_hdev);
-		goto client_hdev_fail;
+		goto err_stream_unregister;
 	}
 	steam->client_hdev->driver_data = steam;
 
 	ret = hid_add_device(steam->client_hdev);
 	if (ret)
-		goto client_hdev_add_fail;
+		goto err_destroy;
 
 	return 0;
 
-client_hdev_add_fail:
-	hid_hw_stop(hdev);
-client_hdev_fail:
+err_destroy:
 	hid_destroy_device(steam->client_hdev);
-input_register_fail:
-hid_hw_open_fail:
-hid_hw_start_fail:
+err_stream_unregister:
+	if (steam->connected)
+		steam_unregister(steam);
+err_hw_close:
+	hid_hw_close(hdev);
+err_hw_stop:
+	hid_hw_stop(hdev);
+err_cancel_work:
 	cancel_work_sync(&steam->work_connect);
 	cancel_delayed_work_sync(&steam->mode_switch);
 	cancel_work_sync(&steam->rumble_work);
+
 	return ret;
 }