[media] siano: Only feed DVB data when there's a feed

Right now, the driver sends DVB data even before tunning.
It was noticed that this may lead into some mistakes at DVB
decode, as the PIDs from wrong channels may be associated with
another frequency, as they may already be inside the PID buffers.
So, prevent it by not feeding DVB demux with data while there's no
feed or while the device is not tuned.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/common/siano/smsdvb-main.c b/drivers/media/common/siano/smsdvb-main.c
index d83896bb98fdff3e653d07e1a93da04fbdb5ddec..4393c688d0ad4a18828e9be7d9b89079a0cfadaf 100644 (file)
--- a/drivers/media/common/siano/smsdvb-main.c
+++ b/drivers/media/common/siano/smsdvb-main.c
@@ -512,8 +512,13 @@ static int smsdvb_onresponse(void *context, struct smscore_buffer_t *cb)
 
        switch (phdr->msgType) {
        case MSG_SMS_DVBT_BDA_DATA:
-               dvb_dmx_swfilter(&client->demux, p,
-                                cb->size - sizeof(struct SmsMsgHdr_ST));
+               /*
+                * Only feed data to dvb demux if are there any feed listening
+                * to it and if the device has tuned
+                */
+               if (client->feed_users && client->has_tuned)
+                       dvb_dmx_swfilter(&client->demux, p,
+                                        cb->size - sizeof(struct SmsMsgHdr_ST));
                break;
 
        case MSG_SMS_RF_TUNE_RES:
@@ -579,9 +584,10 @@ static int smsdvb_onresponse(void *context, struct smscore_buffer_t *cb)
                                sms_board_dvb3_event(client, DVB3_EVENT_UNC_OK);
                        else
                                sms_board_dvb3_event(client, DVB3_EVENT_UNC_ERR);
+                       client->has_tuned = true;
                } else {
                        smsdvb_stats_not_ready(fe);
-
+                       client->has_tuned = false;
                        sms_board_dvb3_event(client, DVB3_EVENT_FE_UNLOCK);
                }
                complete(&client->stats_done);
@@ -623,6 +629,8 @@ static int smsdvb_start_feed(struct dvb_demux_feed *feed)
        sms_debug("add pid %d(%x)",
                  feed->pid, feed->pid);
 
+       client->feed_users++;
+
        PidMsg.xMsgHeader.msgSrcId = DVBT_BDA_CONTROL_MSG_ID;
        PidMsg.xMsgHeader.msgDstId = HIF_TASK;
        PidMsg.xMsgHeader.msgFlags = 0;
@@ -643,6 +651,8 @@ static int smsdvb_stop_feed(struct dvb_demux_feed *feed)
        sms_debug("remove pid %d(%x)",
                  feed->pid, feed->pid);
 
+       client->feed_users--;
+
        PidMsg.xMsgHeader.msgSrcId = DVBT_BDA_CONTROL_MSG_ID;
        PidMsg.xMsgHeader.msgDstId = HIF_TASK;
        PidMsg.xMsgHeader.msgFlags = 0;
@@ -963,6 +973,8 @@ static int smsdvb_set_frontend(struct dvb_frontend *fe)
        c->strength.stat[0].uvalue = 0;
        c->cnr.stat[0].uvalue = 0;
 
+       client->has_tuned = false;
+
        switch (smscore_get_device_mode(coredev)) {
        case DEVICE_MODE_DVBT:
        case DEVICE_MODE_DVBT_BDA:

diff --git a/drivers/media/common/siano/smsdvb.h b/drivers/media/common/siano/smsdvb.h
index 34220696d87d9c0bad1f4ed8352500b5cff24ad2..63cdd755521e5db7459bad19c87590b498fbb0f3 100644 (file)
--- a/drivers/media/common/siano/smsdvb.h
+++ b/drivers/media/common/siano/smsdvb.h
@@ -54,6 +54,9 @@ struct smsdvb_client_t {
 
        unsigned long           get_stats_jiffies;
 
+       int                     feed_users;
+       bool                    has_tuned;
+
        /* Stats debugfs data */
        struct dentry           *debugfs;