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=-4.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS 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 A7F4FC4360F for ; Wed, 3 Apr 2019 10:36:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7BF8C206DD for ; Wed, 3 Apr 2019 10:36:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726682AbfDCKgu (ORCPT ); Wed, 3 Apr 2019 06:36:50 -0400 Received: from mx2.suse.de ([195.135.220.15]:47746 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726263AbfDCKgu (ORCPT ); Wed, 3 Apr 2019 06:36:50 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id B21A0AB6D; Wed, 3 Apr 2019 10:36:48 +0000 (UTC) Message-ID: <1554287791.20869.6.camel@suse.com> Subject: Re: [PATCH V6 1/3] USB: serial: f81232: clear overrun flag From: Oliver Neukum To: "Ji-Ze Hong (Peter Hong)" , peter_hong@fintek.com.tw, johan@kernel.org, gregkh@linuxfoundation.org Cc: "Ji-Ze Hong (Peter Hong)" , linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org Date: Wed, 03 Apr 2019 12:36:31 +0200 In-Reply-To: <1554280832-29286-1-git-send-email-hpeter+linux_kernel@gmail.com> References: <1554280832-29286-1-git-send-email-hpeter+linux_kernel@gmail.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.26.6 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mi, 2019-04-03 at 16:40 +0800, Ji-Ze Hong (Peter Hong) wrote: > The F81232 will report data and LSR with bulk like following format: > bulk-in data: [LSR(1Byte)+DATA(1Byte)][LSR(1Byte)+DATA(1Byte)]... > > LSR will auto clear frame/parity/break error flag when reading by H/W, > but overrrun will only cleared when reading LSR. So this patch add a > worker to read LSR when overrun and flush the worker on close() & > suspend(). > > Cc: Oliver Neukum > Signed-off-by: Ji-Ze Hong (Peter Hong) Reviewed-by: Oliver Neukum