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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9C98DC433EF for ; Tue, 3 May 2022 13:34:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234217AbiECNh4 (ORCPT ); Tue, 3 May 2022 09:37:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55714 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231777AbiECNhz (ORCPT ); Tue, 3 May 2022 09:37:55 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E95553388F for ; Tue, 3 May 2022 06:34:22 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 8F3E86176E for ; Tue, 3 May 2022 13:34:22 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id DD6E1C385A4; Tue, 3 May 2022 13:34:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1651584862; bh=mYHIaDYMamwBUHSHa5MDyYopoBTxO0ecE8iJ2aNCoWc=; h=Subject:To:Cc:From:Date:From; b=yQDWntihUGTojRzWS98esHRWR7lHXXPRuyta8Zk/Lp6S4CcHxeGy/tL59O6XjyUuz SMuRbOWF4m/F0HwLiezoT3vgNMGnlwVf3HwxJKGE/zPZgXHAjhHlkfvE+KVVn/2gJN Fx+xLs1u0wed8+82CWsCh0MbXxkYPN/V8LzvX4Xo= Subject: FAILED: patch "[PATCH] tty: n_gsm: fix wrong DLCI release order" failed to apply to 5.4-stable tree To: daniel.starke@siemens.com, gregkh@linuxfoundation.org Cc: From: Date: Tue, 03 May 2022 15:34:21 +0200 Message-ID: <1651584861129161@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org The patch below does not apply to the 5.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From deefc58bafb4841df7f0a0d85d89a1c819db9743 Mon Sep 17 00:00:00 2001 From: Daniel Starke Date: Thu, 14 Apr 2022 02:42:14 -0700 Subject: [PATCH] tty: n_gsm: fix wrong DLCI release order The current DLCI release order starts with the control channel followed by the user channels. Reverse this order to keep the control channel open until all user channels have been released. Fixes: e1eaea46bb40 ("tty: n_gsm line discipline") Cc: stable@vger.kernel.org Signed-off-by: Daniel Starke Link: https://lore.kernel.org/r/20220414094225.4527-9-daniel.starke@siemens.com Signed-off-by: Greg Kroah-Hartman diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index cc90b03ce005..6b953dfbb155 100644 --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -2146,8 +2146,8 @@ static void gsm_cleanup_mux(struct gsm_mux *gsm, bool disc) /* Finish outstanding timers, making sure they are done */ del_timer_sync(&gsm->t2_timer); - /* Free up any link layer users */ - for (i = 0; i < NUM_DLCI; i++) + /* Free up any link layer users and finally the control channel */ + for (i = NUM_DLCI - 1; i >= 0; i--) if (gsm->dlci[i]) gsm_dlci_release(gsm->dlci[i]); mutex_unlock(&gsm->mutex);