Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757468AbYBNFAY (ORCPT ); Thu, 14 Feb 2008 00:00:24 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750717AbYBNFAL (ORCPT ); Thu, 14 Feb 2008 00:00:11 -0500 Received: from pentafluge.infradead.org ([213.146.154.40]:44184 "EHLO pentafluge.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750715AbYBNFAJ (ORCPT ); Thu, 14 Feb 2008 00:00:09 -0500 Date: Wed, 13 Feb 2008 21:02:11 -0800 From: Greg KH To: David Newall Cc: linux-usb@vger.kernel.org, Linux Kernel Mailing List Subject: Re: Handshaking on USB serial devices Message-ID: <20080214050211.GB1432@kroah.com> References: <47B30291.2040905@davidnewall.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <47B30291.2040905@davidnewall.com> User-Agent: Mutt/1.5.16 (2007-06-09) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 689 Lines: 18 On Thu, Feb 14, 2008 at 01:15:37AM +1030, David Newall wrote: > Consider a USB-attached serial port that is set to do RTS/CTS (or > DSR/DTR) handshaking: What stops the kernel sending more data to it when > the remote end lowers CTS (or DTR)? The tty layer should look at the proper flags and not send data on to the driver in this kind of instance. Is this not happening properly for you? If so, which USB serial driver? thanks, greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/