From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-fx0-f213.google.com ([209.85.220.213]:62508 "EHLO mail-fx0-f213.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752160AbZLDPnx (ORCPT ); Fri, 4 Dec 2009 10:43:53 -0500 Received: by fxm5 with SMTP id 5so2598371fxm.28 for ; Fri, 04 Dec 2009 07:43:59 -0800 (PST) MIME-Version: 1.0 In-Reply-To: <44c6f3de0912040631m7a8c195bldf9df89af7df36fa@mail.gmail.com> References: <44c6f3de0912032000g3aa2a7cbla26b5132d229a6ac@mail.gmail.com> <829197380912032021t3232e391qc3a4c840529f7ed6@mail.gmail.com> <829197380912032117h1d01f80akf3b1ed7d81e3c6bf@mail.gmail.com> <44c6f3de0912040631m7a8c195bldf9df89af7df36fa@mail.gmail.com> Date: Fri, 4 Dec 2009 10:43:59 -0500 Message-ID: <829197380912040743q620feb3es60f8cd292c26eb7a@mail.gmail.com> Subject: Re: Hauppage hvr-950q au0828 transfer problem affecting audio and perhaps video From: Devin Heitmueller To: John S Gruber Cc: linux-media@vger.kernel.org Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-media-owner@vger.kernel.org List-ID: On Fri, Dec 4, 2009 at 9:31 AM, John S Gruber wrote: > I produced the dump of URB sizes you requested by adding that printk() line. The > results are at http://pastebin.com/f26f29133 Hi John, This is good info (especially since you have kernel timestamps enabled). Did you have a specific reference to the USB audio spec which said the packet size has to be on an integer boundary? I took a look at the spec last night and didn't see anything to that end. Do you have a proposed patch to usbaudio.c which "works for you"? If so, feel free to send it along and I will review and provide comments. If the spec does not require the packets to be on an integer boundary, perhaps the driver just improperly assumes they will be (and they were for whatever developer wrote the original code). Devin -- Devin J. Heitmueller - Kernel Labs http://www.kernellabs.com