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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BD2E9C433EF for ; Mon, 11 Oct 2021 14:14:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A581460EBD for ; Mon, 11 Oct 2021 14:14:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238075AbhJKOQV (ORCPT ); Mon, 11 Oct 2021 10:16:21 -0400 Received: from mail.kernel.org ([198.145.29.99]:34548 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238732AbhJKOOD (ORCPT ); Mon, 11 Oct 2021 10:14:03 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 797C5611F0; Mon, 11 Oct 2021 14:04:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1633961085; bh=HCXI20stdnuzkb0h743Yz6YpahZGpyo7fxgJ+6Gz6No=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=kw7Dz2f6nOKAYP+pjJlhVprEAPU3PwDS0P2BEzyx5qV4QaLenUi8pw1YPcJFQ6Ec3 WJVmV+0a/mPn9ZXvq9f+ejh9iZp/oh3996uaRer+bzF7Idif7PNfK1CTTAc8PgEZfN SuJziyFrdRske10PZ7UwKm0D/A+dNcBv0HnsZQAY= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Oliver Neukum , Johan Hovold Subject: [PATCH 4.19 03/28] USB: cdc-acm: fix break reporting Date: Mon, 11 Oct 2021 15:46:53 +0200 Message-Id: <20211011134640.825082949@linuxfoundation.org> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20211011134640.711218469@linuxfoundation.org> References: <20211011134640.711218469@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Johan Hovold commit 58fc1daa4d2e9789b9ffc880907c961ea7c062cc upstream. A recent change that started reporting break events forgot to push the event to the line discipline, which meant that a detected break would not be reported until further characters had been receive (the port could even have been closed and reopened in between). Fixes: 08dff274edda ("cdc-acm: fix BREAK rx code path adding necessary calls") Cc: stable@vger.kernel.org Acked-by: Oliver Neukum Signed-off-by: Johan Hovold Link: https://lore.kernel.org/r/20210929090937.7410-3-johan@kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/usb/class/cdc-acm.c | 3 +++ 1 file changed, 3 insertions(+) --- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -339,6 +339,9 @@ static void acm_process_notification(str acm->iocount.overrun++; spin_unlock_irqrestore(&acm->read_lock, flags); + if (newctrl & ACM_CTRL_BRK) + tty_flip_buffer_push(&acm->port); + if (difference) wake_up_all(&acm->wioctl);