From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-in-01.arcor-online.net ([151.189.21.41]:53900 "EHLO mail-in-01.arcor-online.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752484Ab0F3T5U (ORCPT ); Wed, 30 Jun 2010 15:57:20 -0400 Message-ID: <4C2BA19C.9080708@arcor.de> Date: Wed, 30 Jun 2010 21:57:16 +0200 From: Stefan Ringel MIME-Version: 1.0 To: Linux Media Mailing List CC: Mauro Carvalho Chehab Subject: tm6000 and losing blocks Content-Type: text/plain; charset=ISO-8859-15 Content-Transfer-Encoding: 7bit Sender: linux-media-owner@vger.kernel.org List-ID: Hi Mauro, I have tested your patch, but that logic to detect the end of urb is wrong. Many blocks going to lost. byte 0x47 can 2 different state: 1. sync byte 2. data byte Your logic has that problem, that if receive the new urb and search the new sync byte, the first 0x47 will use and that are not always the sync byte. >From: Mauro Carvalho Chehab >Date: Mon, 7 Jun 2010 15:10:14 +0000 (-0300) >Subject: tm6000: Fix copybuf continue logic >X-Git-Url: http://git.linuxtv.org/v4l-dvb.git?a=commitdiff_plain;h=dcdc55b917681378f84e6db26dcd56931ae2f1c8 > >tm6000: Fix copybuf continue logic >Signed-off-by: Mauro Carvalho Chehab >--- > >diff --git a/drivers/staging/tm6000/tm6000-video.c b/drivers/staging/tm6000/tm6000-video.c >index 6bf2b13..9a0b5a7 100644 >--- a/drivers/staging/tm6000/tm6000-video.c >+++ b/drivers/staging/tm6000/tm6000-video.c >@@ -285,7 +285,7 @@ static int copy_streams(u8 *data, unsigned long len, > break; > case TM6000_URB_MSG_AUDIO: > case TM6000_URB_MSG_PTS: >- cpysize = pktsize; /* Size is always 180 bytes */ >+ size = pktsize; /* Size is always 180 bytes */ > break; > } > } else { >@@ -315,7 +315,7 @@ static int copy_streams(u8 *data, unsigned long len, > break; > } > } >- if (ptr + pktsize > endp) { >+ if (cpysize < size) { > /* End of URB packet, but cmd processing is not > * complete. Preserve the state for a next packet > */ I think that is wrong >@@ -323,7 +323,7 @@ static int copy_streams(u8 *data, unsigned long len, > dev->isoc_ctl.size = size - cpysize; > dev->isoc_ctl.cmd = cmd; > dev->isoc_ctl.pktsize = pktsize - (endp - ptr); >- ptr += endp - ptr; >+ ptr += cpysize; > } else { > dev->isoc_ctl.cmd = 0; > ptr += pktsize; dito Stefan Ringel -- Stefan Ringel