media: dvb_demux: Better handle discontinuity errors

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>

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);