From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E80D8C7112A for ; Sun, 14 Oct 2018 15:55:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B716F205C9 for ; Sun, 14 Oct 2018 15:55:59 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B716F205C9 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=decadent.org.uk Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729733AbeJNXhX (ORCPT ); Sun, 14 Oct 2018 19:37:23 -0400 Received: from shadbolt.e.decadent.org.uk ([88.96.1.126]:37542 "EHLO shadbolt.e.decadent.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727718AbeJNXhX (ORCPT ); Sun, 14 Oct 2018 19:37:23 -0400 Received: from [2a02:8011:400e:2:cbab:f00:c93f:614] (helo=deadeye) by shadbolt.decadent.org.uk with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.84_2) (envelope-from ) id 1gBiMH-0004cY-Fy; Sun, 14 Oct 2018 16:31:09 +0100 Received: from ben by deadeye with local (Exim 4.91) (envelope-from ) id 1gBiLO-0000Bq-Gz; Sun, 14 Oct 2018 16:30:14 +0100 Content-Type: text/plain; charset="UTF-8" Content-Disposition: inline Content-Transfer-Encoding: 8bit MIME-Version: 1.0 From: Ben Hutchings To: linux-kernel@vger.kernel.org, stable@vger.kernel.org CC: akpm@linux-foundation.org, "Sean Young" , "Mauro Carvalho Chehab" Date: Sun, 14 Oct 2018 16:25:40 +0100 Message-ID: X-Mailer: LinuxStableQueue (scripts by bwh) Subject: [PATCH 3.16 042/366] media: rc: oops in ir_timer_keyup after device unplug In-Reply-To: X-SA-Exim-Connect-IP: 2a02:8011:400e:2:cbab:f00:c93f:614 X-SA-Exim-Mail-From: ben@decadent.org.uk X-SA-Exim-Scanned: No (on shadbolt.decadent.org.uk); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.16.60-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Sean Young commit 8d4068810d9926250dd2435719a080b889eb44c3 upstream. If there is IR in the raw kfifo when ir_raw_event_unregister() is called, then kthread_stop() causes ir_raw_event_thread to be scheduled, decode some scancodes and re-arm timer_keyup. The timer_keyup then fires when the rc device is long gone. Signed-off-by: Sean Young Signed-off-by: Mauro Carvalho Chehab [bwh: Backported to 3.16: - There's no timer_repeat to move - Adjust context] Signed-off-by: Ben Hutchings --- --- a/drivers/media/rc/rc-main.c +++ b/drivers/media/rc/rc-main.c @@ -1427,13 +1427,13 @@ void rc_unregister_device(struct rc_dev if (!dev) return; - del_timer_sync(&dev->timer_keyup); - clear_bit(dev->devno, ir_core_dev_number); if (dev->driver_type == RC_DRIVER_IR_RAW) ir_raw_event_unregister(dev); + del_timer_sync(&dev->timer_keyup); + /* Freeing the table should also call the stop callback */ ir_free_table(&dev->rc_map); IR_dprintk(1, "Freed keycode table\n");