From 5144f5b76028dbfdbbf2f10721b73a553451c83a Mon Sep 17 00:00:00 2001 From: John Smith Date: Tue, 5 Mar 2013 18:02:43 -0300 Subject: [PATCH] [media] dvb_demux: Transport stream continuity check fix This patch avoids incrementing continuity counter demux->cnt_storage[pid] for TS packets without payload in accordance with ISO /IEC 13818-1. [mchehab@redhat.com: unmangle whitespacing and fix CodingStyle. Also checked ISO/IEC spec: patch is according with it] Reviewed-by: Mauro Carvalho Chehab Signed-off-by: John Smith Signed-off-by: Mauro Carvalho Chehab --- drivers/media/dvb-core/dvb_demux.c | 24 +++++++++++++----------- 1 file changed, 13 insertions(+), 11 deletions(-) diff --git a/drivers/media/dvb-core/dvb_demux.c b/drivers/media/dvb-core/dvb_demux.c index d319717..71641b2 100644 --- a/drivers/media/dvb-core/dvb_demux.c +++ b/drivers/media/dvb-core/dvb_demux.c @@ -440,20 +440,22 @@ static void dvb_dmx_swfilter_packet(struct dvb_demux *demux, const u8 *buf) if (!dvb_demux_feed_err_pkts) return; } else /* if TEI bit is set, pid may be wrong- skip pkt counter */ - if (demux->cnt_storage && dvb_demux_tscheck) { - /* check pkt counter */ - if (pid < MAX_PID) { - if ((buf[3] & 0xf) != demux->cnt_storage[pid]) - dprintk_tscheck("TS packet counter mismatch. " - "PID=0x%x expected 0x%x " - "got 0x%x\n", + if (demux->cnt_storage && dvb_demux_tscheck) { + /* check pkt counter */ + if (pid < MAX_PID) { + if (buf[3] & 0x10) + demux->cnt_storage[pid] = + (demux->cnt_storage[pid] + 1) & 0xf; + + if ((buf[3] & 0xf) != demux->cnt_storage[pid]) { + dprintk_tscheck("TS packet counter mismatch. PID=0x%x expected 0x%x got 0x%x\n", pid, demux->cnt_storage[pid], buf[3] & 0xf); - - demux->cnt_storage[pid] = ((buf[3] & 0xf) + 1)&0xf; + demux->cnt_storage[pid] = buf[3] & 0xf; + } + } + /* end check */ } - /* end check */ - } list_for_each_entry(feed, &demux->feed_list, list_head) { if ((feed->pid != pid) && (feed->pid != 0x2000)) -- 2.7.4