From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751981AbbAKNnJ (ORCPT ); Sun, 11 Jan 2015 08:43:09 -0500 Received: from mail-yh0-f51.google.com ([209.85.213.51]:60218 "EHLO mail-yh0-f51.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751224AbbAKNnG (ORCPT ); Sun, 11 Jan 2015 08:43:06 -0500 From: Jeremiah Mahler To: Johan Hovold Cc: Greg Kroah-Hartman , linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, Jeremiah Mahler Subject: [PATCH v3 0/2] usb: serial: silence non-critical unplug read errors Date: Sun, 11 Jan 2015 05:42:05 -0800 Message-Id: <1420983727-5167-1-git-send-email-jmmahler@gmail.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1419066698-2684-1-git-send-email-jmmahler@gmail.com> References: <1419066698-2684-1-git-send-email-jmmahler@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org If a USB serial device (e.g. /dev/ttyUSB0) with an active program is unplugged, a bunch of -ENODEV and -EPROTO errors may be produced in the logs. This patch set quiets these messages without changing the original behavior. This change is beneficial when using daemons such as slcand, which is similar to pppd or slip, that cannot determine whether they should exit until after the USB serial device is unplugged. Producing these error messages for a normal use case is not helpful. Changes in v3: - change "will spam" to "might spam" since it is dependent upon what host controller and devices are used. - fix subject: it is silencing all errors, not just one as in previous versions. Changes in v2: - Instead of handling -EPROTO specially, use dev_dbg instead of dev_err like other drivers do. Jeremiah Mahler (2): usb: serial: silence all non-critical read errors usb: serial: handle -ENODEV quietly in generic_submit_read_urb drivers/usb/serial/generic.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) -- 2.1.4