From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753074AbdGMPlm (ORCPT ); Thu, 13 Jul 2017 11:41:42 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:38350 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753046AbdGMPlk (ORCPT ); Thu, 13 Jul 2017 11:41:40 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Ian Abbott Subject: [PATCH 4.9 20/25] staging: comedi: fix clean-up of comedi_class in comedi_init() Date: Thu, 13 Jul 2017 17:40:34 +0200 Message-Id: <20170713154002.780271207@linuxfoundation.org> X-Mailer: git-send-email 2.13.2 In-Reply-To: <20170713154001.535209166@linuxfoundation.org> References: <20170713154001.535209166@linuxfoundation.org> User-Agent: quilt/0.65 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Ian Abbott commit a9332e9ad09c2644c99058fcf6ae2f355e93ce74 upstream. There is a clean-up bug in the core comedi module initialization functions, `comedi_init()`. If the `comedi_num_legacy_minors` module parameter is non-zero (and valid), it creates that many "legacy" devices and registers them in SysFS. A failure causes the function to clean up and return an error. Unfortunately, it fails to destroy the "comedi" class that was created earlier. Fix it by adding a call to `class_destroy(comedi_class)` at the appropriate place in the clean-up sequence. Signed-off-by: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- drivers/staging/comedi/comedi_fops.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/staging/comedi/comedi_fops.c +++ b/drivers/staging/comedi/comedi_fops.c @@ -2908,6 +2908,7 @@ static int __init comedi_init(void) dev = comedi_alloc_board_minor(NULL); if (IS_ERR(dev)) { comedi_cleanup_board_minors(); + class_destroy(comedi_class); cdev_del(&comedi_cdev); unregister_chrdev_region(MKDEV(COMEDI_MAJOR, 0), COMEDI_NUM_MINORS);