From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from smtp3-g21.free.fr ([212.27.42.3]:55425 "EHLO smtp3-g21.free.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752605Ab0AIMew convert rfc822-to-8bit (ORCPT ); Sat, 9 Jan 2010 07:34:52 -0500 Date: Sat, 9 Jan 2010 13:36:02 +0100 From: Jean-Francois Moine To: =?UTF-8?B?TsOpbWV0aCBNw6FydG9u?= Cc: V4L Mailing List Subject: Re: gspca - pac7302: Add a delay on loading the bridge registers. Message-ID: <20100109133602.01c34ce9@tele> In-Reply-To: <4B476B5E.7040909@freemail.hu> References: <4B476B5E.7040909@freemail.hu> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8BIT Sender: linux-media-owner@vger.kernel.org List-ID: On Fri, 08 Jan 2010 18:29:02 +0100 Németh Márton wrote: > > Without the delay, the usb_control_msg() may fail when loading the > > page 3 with error -71 or -62. > > > > Priority: normal > > > > Signed-off-by: Jean-Francois Moine > > include/asm-generic/errno.h: > > #define ETIME 62 /* Timer expired */ > > #define EPROTO 71 /* Protocol error */ > > I'm interested in which device have you used for testing this? Hi, These errors occured with the webcam 06f8:3009, but I do not know exactly how. I thought about a speed problem. May be, when the webcam cannot treat quickly enough the requests, either it returns errors or it crashes. An other cause could be a bug in the ohci_hcd, but I do not looked at it. The delay was just a test and it fixed the problem. That is all the user wanted... Regards. -- Ken ar c'hentañ | ** Breizh ha Linux atav! ** Jef | http://moinejf.free.fr/