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[1/2] media: dvb_demux: Better handle discontinuity errors

Message ID fed488b3956b6dc637bec6b5a0bc10d6435da9f5.1517230202.git.mchehab@s-opensource.com (mailing list archive)
State New, archived
Headers show

Commit Message

Mauro Carvalho Chehab Jan. 29, 2018, 12:50 p.m. UTC 
From: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

When a packet discontinuity happens, it is not just the payload
that was lost. The headers are lost too. So, the max size is not
184 but, instead 188.

Also, while printing warnings, make a distinction between
MPEG-TS indicated discontinuity and detected one.

Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
---
 drivers/media/dvb-core/dvb_demux.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)
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Patch

diff --git a/drivers/media/dvb-core/dvb_demux.c b/drivers/media/dvb-core/dvb_demux.c
index 5047a1f87050..1a6e2e61952a 100644
--- a/drivers/media/dvb-core/dvb_demux.c
+++ b/drivers/media/dvb-core/dvb_demux.c
@@ -310,8 +310,9 @@  static int dvb_dmx_swfilter_section_packet(struct dvb_demux_feed *feed,
 
 	if (!ccok || dc_i) {
 #ifdef CONFIG_DVB_DEMUX_SECTION_LOSS_LOG
-		dprintk("dvb_demux.c discontinuity detected %d bytes lost\n",
-			count);
+		dprintk("discontinuity %s: %d bytes lost\n",
+			!ccok ? "detected" : "indicated",
+			count + 4);
 		/*
 		 * those bytes under sume circumstances will again be reported
 		 * in the following dvb_dmx_swfilter_section_new
@@ -320,6 +321,9 @@  static int dvb_dmx_swfilter_section_packet(struct dvb_demux_feed *feed,
 		/*
 		 * Discontinuity detected. Reset pusi_seen to
 		 * stop feeding of suspicious data until next PUSI=1 arrives
+		 *
+		 * FIXME: does it make sense if the MPEG-TS is the one
+		 *	reporting discontinuity?
 		 */
 		feed->pusi_seen = false;
 		dvb_dmx_swfilter_section_new(feed);