From patchwork Wed May 4 16:46:02 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 569751 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 438B5C433EF for ; Wed, 4 May 2022 17:07:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1355877AbiEDRKo (ORCPT ); Wed, 4 May 2022 13:10:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40588 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1356385AbiEDRJM (ORCPT ); Wed, 4 May 2022 13:09:12 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 92F6D4A3C5; Wed, 4 May 2022 09:55:05 -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 BD784618A8; Wed, 4 May 2022 16:55:04 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 18204C385A4; Wed, 4 May 2022 16:55:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1651683304; bh=Hkp8DQehoNPd3+uQxjKYuRBfz4VL9KbFU2WrwH6PcyU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RlhrGh7tQEFZgIapDeruJSzynthwjN2cnbBd+/7Eky/mAkQvw2jzPCsmqv1x7U4ud 9auPz1G22M+y7MVdA0D0+yOWz8+FEQIMahU6Sv218KJ66Dmm+kx+x5zTkI1WSgXO0N kaSSZRePaIgSs2m5K3VHii4STU1tFmw4uACU/D54= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Daniel Starke Subject: [PATCH 5.15 169/177] tty: n_gsm: fix missing tty wakeup in convergence layer type 2 Date: Wed, 4 May 2022 18:46:02 +0200 Message-Id: <20220504153108.699326364@linuxfoundation.org> X-Mailer: git-send-email 2.36.0 In-Reply-To: <20220504153053.873100034@linuxfoundation.org> References: <20220504153053.873100034@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Daniel Starke commit 1adf6fee58ca25fb6720b8d34c919dcf5425cc9c upstream. gsm_control_modem() informs the virtual tty that more data can be written after receiving a control signal octet via modem status command (MSC). However, gsm_dlci_data() fails to do the same after receiving a control signal octet from the convergence layer type 2 header. Add tty_wakeup() in gsm_dlci_data() for convergence layer type 2 to fix this. Fixes: e1eaea46bb40 ("tty: n_gsm line discipline") Cc: stable@vger.kernel.org Signed-off-by: Daniel Starke Link: https://lore.kernel.org/r/20220414094225.4527-14-daniel.starke@siemens.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/n_gsm.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -1586,6 +1586,7 @@ static void gsm_dlci_data(struct gsm_dlc tty = tty_port_tty_get(port); if (tty) { gsm_process_modem(tty, dlci, modem, slen); + tty_wakeup(tty); tty_kref_put(tty); } fallthrough;