From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933611AbaEMNam (ORCPT ); Tue, 13 May 2014 09:30:42 -0400 Received: from mail-ee0-f49.google.com ([74.125.83.49]:41237 "EHLO mail-ee0-f49.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754383AbaEMNak (ORCPT ); Tue, 13 May 2014 09:30:40 -0400 Message-ID: <53721E7C.3090406@gmail.com> Date: Tue, 13 May 2014 15:30:36 +0200 From: Daniel Mack User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.5.0 MIME-Version: 1.0 To: George Cherian , linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, linux-omap@vger.kernel.org CC: balbi@ti.com, gregkh@linuxfoundation.org Subject: Re: [PATCH v3 0/5] Add support for SW babble Control References: <1399969905-3509-1-git-send-email-george.cherian@ti.com> <5371EA01.3080307@gmail.com> <537208A9.4020507@ti.com> <53720E0F.3070008@gmail.com> <537216AC.4090401@ti.com> <53721ABF.8060705@gmail.com> <53721D24.4090704@ti.com> In-Reply-To: <53721D24.4090704@ti.com> X-Enigmail-Version: 1.6 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 05/13/2014 03:24 PM, George Cherian wrote: > Basically, there are 2 types of babble conditions. > 1) Transient babble condition - which could be recovered from without an > IP reset . > 2) Babble condition - which could be recovered from only by doing an IP > reset. Ok, thanks for the explanation. > Looks like you are always hitting case 2 (Most times am also hitting the > same). Seems like, yes. > There is no 100% reliable method to force it to happen. Following is > my setup , > I have a HUB with 4 devices connected , which gives me a Babble interrupt > on both connects and disconnects ( Not always though). I also get them at disconnects, but only with one specific USB device. But as I don't ever see case 1) above, I can't say if your approach works. What I can say, though, is that your patches don't break the recovery from babble conditions that I experienced :) Daniel