[PATCH] dvb: ttpci: more error handling for firmware communication

o propagate more errors back to caller or log them, mainly in
  av7110.c and av7110_av.c
o fix error message in StartHWFilter
o do not StopHWFilter for handle 0xffff

Signed-off-by: Wolfgang Rohdewald <wolfgang@rohdewald.de>
Signed-off-by: Johannes Stezenbach <js@linuxtv.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 146 insertions, 91 deletions

diff --git a/drivers/media/dvb/ttpci/av7110.c b/drivers/media/dvb/ttpci/av7110.c
index 8e33a850e13..e21deee9a98 100644
--- a/drivers/media/dvb/ttpci/av7110.c
+++ b/drivers/media/dvb/ttpci/av7110.c
@@ -116,13 +116,18 @@ static int av7110_num = 0;
 
 static void init_av7110_av(struct av7110 *av7110)
 {
+	int ret;
 	struct saa7146_dev *dev = av7110->dev;
 
 	/* set internal volume control to maximum */
 	av7110->adac_type = DVB_ADAC_TI;
-	av7110_set_volume(av7110, av7110->mixer.volume_left, av7110->mixer.volume_right);
+	ret = av7110_set_volume(av7110, av7110->mixer.volume_left, av7110->mixer.volume_right);
+	if (ret<0)
+		printk("dvb-ttpci:cannot set internal volume to maximum:%d\n",ret);
 
-	av7710_set_video_mode(av7110, vidmode);
+	ret = av7710_set_video_mode(av7110, vidmode);
+	if (ret<0)
+		printk("dvb-ttpci:cannot set video mode:%d\n",ret);
 
 	/* handle different card types */
 	/* remaining inits according to card and frontend type */
@@ -156,8 +161,12 @@ static void init_av7110_av(struct av7110 *av7110)
 
 	if (av7110->adac_type == DVB_ADAC_NONE || av7110->adac_type == DVB_ADAC_MSP) {
 		// switch DVB SCART on
-		av7110_fw_cmd(av7110, COMTYPE_AUDIODAC, MainSwitch, 1, 0);
-		av7110_fw_cmd(av7110, COMTYPE_AUDIODAC, ADSwitch, 1, 1);
+		ret = av7110_fw_cmd(av7110, COMTYPE_AUDIODAC, MainSwitch, 1, 0);
+		if (ret<0)
+			printk("dvb-ttpci:cannot switch on SCART(Main):%d\n",ret);
+		ret = av7110_fw_cmd(av7110, COMTYPE_AUDIODAC, ADSwitch, 1, 1);
+		if (ret<0)
+			printk("dvb-ttpci:cannot switch on SCART(AD):%d\n",ret);
 		if (rgb_on &&
 		    (av7110->dev->pci->subsystem_vendor == 0x110a) && (av7110->dev->pci->subsystem_device == 0x0000)) {
 			saa7146_setgpio(dev, 1, SAA7146_GPIO_OUTHI); // RGB on, SCART pin 16
@@ -165,8 +174,12 @@ static void init_av7110_av(struct av7110 *av7110)
 		}
 	}
 
-	av7110_set_volume(av7110, av7110->mixer.volume_left, av7110->mixer.volume_right);
-	av7110_setup_irc_config(av7110, 0);
+	ret = av7110_set_volume(av7110, av7110->mixer.volume_left, av7110->mixer.volume_right);
+	if (ret<0)
+		printk("dvb-ttpci:cannot set volume :%d\n",ret);
+	ret = av7110_setup_irc_config(av7110, 0);
+	if (ret<0)
+		printk("dvb-ttpci:cannot setup irc config :%d\n",ret);
 }
 
 static void recover_arm(struct av7110 *av7110)
@@ -258,8 +271,9 @@ static int arm_thread(void *data)
  *
  *  If we want to support multiple controls we would have to do much more...
  */
-void av7110_setup_irc_config(struct av7110 *av7110, u32 ir_config)
+int av7110_setup_irc_config(struct av7110 *av7110, u32 ir_config)
 {
+	int ret = 0;
 	static struct av7110 *last;
 
 	dprintk(4, "%p\n", av7110);
@@ -270,9 +284,10 @@ void av7110_setup_irc_config(struct av7110 *av7110, u32 ir_config)
 		last = av7110;
 
 	if (av7110) {
-		av7110_fw_cmd(av7110, COMTYPE_PIDFILTER, SetIR, 1, ir_config);
+		ret = av7110_fw_cmd(av7110, COMTYPE_PIDFILTER, SetIR, 1, ir_config);
 		av7110->ir_config = ir_config;
 	}
+	return ret;
 }
 
 static void (*irc_handler)(u32);
@@ -765,13 +780,14 @@ static inline int SetPIDs(struct av7110 *av7110, u16 vpid, u16 apid, u16 ttpid,
 			     pcrpid, vpid, apid, ttpid, subpid);
 }
 
-void ChangePIDs(struct av7110 *av7110, u16 vpid, u16 apid, u16 ttpid,
+int ChangePIDs(struct av7110 *av7110, u16 vpid, u16 apid, u16 ttpid,
 		u16 subpid, u16 pcrpid)
 {
+	int ret = 0;
 	dprintk(4, "%p\n", av7110);
 
 	if (down_interruptible(&av7110->pid_mutex))
-		return;
+		return -ERESTARTSYS;
 
 	if (!(vpid & 0x8000))
 		av7110->pids[DMX_PES_VIDEO] = vpid;
@@ -786,10 +802,11 @@ void ChangePIDs(struct av7110 *av7110, u16 vpid, u16 apid, u16 ttpid,
 
 	if (av7110->fe_synced) {
 		pcrpid = av7110->pids[DMX_PES_PCR];
-		SetPIDs(av7110, vpid, apid, ttpid, subpid, pcrpid);
+		ret = SetPIDs(av7110, vpid, apid, ttpid, subpid, pcrpid);
 	}
 
 	up(&av7110->pid_mutex);
+	return ret;
 }
 
 
@@ -832,11 +849,13 @@ static int StartHWFilter(struct dvb_demux_filter *dvbdmxfilter)
 	ret = av7110_fw_request(av7110, buf, 20, &handle, 1);
 	if (ret != 0 || handle >= 32) {
 		printk("dvb-ttpci: %s error  buf %04x %04x %04x %04x  "
-				"ret %x  handle %04x\n",
+				"ret %d  handle %04x\n",
 				__FUNCTION__, buf[0], buf[1], buf[2], buf[3],
 				ret, handle);
 		dvbdmxfilter->hw_handle = 0xffff;
-		return -1;
+		if (!ret)
+			ret = -1;
+		return ret;
 	}
 
 	av7110->handle2filter[handle] = dvbdmxfilter;
@@ -859,7 +878,7 @@ static int StopHWFilter(struct dvb_demux_filter *dvbdmxfilter)
 	if (handle >= 32) {
 		printk("%s tried to stop invalid filter %04x, filter type = %x\n",
 				__FUNCTION__, handle, dvbdmxfilter->type);
-		return 0;
+		return -EINVAL;
 	}
 
 	av7110->handle2filter[handle] = NULL;
@@ -873,18 +892,20 @@ static int StopHWFilter(struct dvb_demux_filter *dvbdmxfilter)
 				"resp %04x %04x  pid %d\n",
 				__FUNCTION__, buf[0], buf[1], buf[2], ret,
 				answ[0], answ[1], dvbdmxfilter->feed->pid);
-		ret = -1;
+		if (!ret)
+			ret = -1;
 	}
 	return ret;
 }
 
 
-static void dvb_feed_start_pid(struct dvb_demux_feed *dvbdmxfeed)
+static int dvb_feed_start_pid(struct dvb_demux_feed *dvbdmxfeed)
 {
 	struct dvb_demux *dvbdmx = dvbdmxfeed->demux;
 	struct av7110 *av7110 = (struct av7110 *) dvbdmx->priv;
 	u16 *pid = dvbdmx->pids, npids[5];
 	int i;
+	int ret = 0;
 
 	dprintk(4, "%p\n", av7110);
 
@@ -893,36 +914,49 @@ static void dvb_feed_start_pid(struct dvb_demux_feed *dvbdmxfeed)
 	npids[i] = (pid[i]&0x8000) ? 0 : pid[i];
 	if ((i == 2) && npids[i] && (dvbdmxfeed->ts_type & TS_PACKET)) {
 		npids[i] = 0;
-		ChangePIDs(av7110, npids[1], npids[0], npids[2], npids[3], npids[4]);
-		StartHWFilter(dvbdmxfeed->filter);
-		return;
+		ret = ChangePIDs(av7110, npids[1], npids[0], npids[2], npids[3], npids[4]);
+		if (!ret)
+			ret = StartHWFilter(dvbdmxfeed->filter);
+		return ret;
+	}
+	if (dvbdmxfeed->pes_type <= 2 || dvbdmxfeed->pes_type == 4) {
+		ret = ChangePIDs(av7110, npids[1], npids[0], npids[2], npids[3], npids[4]);
+		if (ret)
+			return ret;
 	}
-	if (dvbdmxfeed->pes_type <= 2 || dvbdmxfeed->pes_type == 4)
-		ChangePIDs(av7110, npids[1], npids[0], npids[2], npids[3], npids[4]);
 
 	if (dvbdmxfeed->pes_type < 2 && npids[0])
 		if (av7110->fe_synced)
-			av7110_fw_cmd(av7110, COMTYPE_PIDFILTER, Scan, 0);
+		{
+			ret = av7110_fw_cmd(av7110, COMTYPE_PIDFILTER, Scan, 0);
+			if (ret)
+				return ret;
+		}
 
 	if ((dvbdmxfeed->ts_type & TS_PACKET)) {
 		if (dvbdmxfeed->pes_type == 0 && !(dvbdmx->pids[0] & 0x8000))
-			av7110_av_start_record(av7110, RP_AUDIO, dvbdmxfeed);
+			ret = av7110_av_start_record(av7110, RP_AUDIO, dvbdmxfeed);
 		if (dvbdmxfeed->pes_type == 1 && !(dvbdmx->pids[1] & 0x8000))
-			av7110_av_start_record(av7110, RP_VIDEO, dvbdmxfeed);
+			ret = av7110_av_start_record(av7110, RP_VIDEO, dvbdmxfeed);
 	}
+	return ret;
 }
 
-static void dvb_feed_stop_pid(struct dvb_demux_feed *dvbdmxfeed)
+static int dvb_feed_stop_pid(struct dvb_demux_feed *dvbdmxfeed)
 {
 	struct dvb_demux *dvbdmx = dvbdmxfeed->demux;
 	struct av7110 *av7110 = (struct av7110 *) dvbdmx->priv;
 	u16 *pid = dvbdmx->pids, npids[5];
 	int i;
 
+	int ret = 0;
+
 	dprintk(4, "%p\n", av7110);
 
 	if (dvbdmxfeed->pes_type <= 1) {
-		av7110_av_stop(av7110, dvbdmxfeed->pes_type ?  RP_VIDEO : RP_AUDIO);
+		ret = av7110_av_stop(av7110, dvbdmxfeed->pes_type ?  RP_VIDEO : RP_AUDIO);
+		if (ret)
+			return ret;
 		if (!av7110->rec_mode)
 			dvbdmx->recording = 0;
 		if (!av7110->playing)
@@ -933,24 +967,27 @@ static void dvb_feed_stop_pid(struct dvb_demux_feed *dvbdmxfeed)
 	switch (i) {
 	case 2: //teletext
 		if (dvbdmxfeed->ts_type & TS_PACKET)
-			StopHWFilter(dvbdmxfeed->filter);
+			ret = StopHWFilter(dvbdmxfeed->filter);
 		npids[2] = 0;
 		break;
 	case 0:
 	case 1:
 	case 4:
 		if (!pids_off)
-			return;
+			return 0;
 		npids[i] = (pid[i]&0x8000) ? 0 : pid[i];
 		break;
 	}
-	ChangePIDs(av7110, npids[1], npids[0], npids[2], npids[3], npids[4]);
+	if (!ret)
+		ret = ChangePIDs(av7110, npids[1], npids[0], npids[2], npids[3], npids[4]);
+	return ret;
 }
 
 static int av7110_start_feed(struct dvb_demux_feed *feed)
 {
 	struct dvb_demux *demux = feed->demux;
 	struct av7110 *av7110 = demux->priv;
+	int ret = 0;
 
 	dprintk(4, "%p\n", av7110);
 
@@ -971,21 +1008,22 @@ static int av7110_start_feed(struct dvb_demux_feed *feed)
 					   !(demux->pids[1] & 0x8000)) {
 					       dvb_ringbuffer_flush_spinlock_wakeup(&av7110->avout);
 					       dvb_ringbuffer_flush_spinlock_wakeup(&av7110->aout);
-					       av7110_av_start_play(av7110,RP_AV);
-					       demux->playing = 1;
+					       ret = av7110_av_start_play(av7110,RP_AV);
+					       if (!ret)
+						       demux->playing = 1;
 					}
 				break;
 			default:
-				dvb_feed_start_pid(feed);
+				ret = dvb_feed_start_pid(feed);
 				break;
 			}
 		} else if ((feed->ts_type & TS_PACKET) &&
 			   (demux->dmx.frontend->source != DMX_MEMORY_FE)) {
-			StartHWFilter(feed->filter);
+			ret = StartHWFilter(feed->filter);
 		}
 	}
 
-	if (feed->type == DMX_TYPE_SEC) {
+	else if (feed->type == DMX_TYPE_SEC) {
 		int i;
 
 		for (i = 0; i < demux->filternum; i++) {
@@ -996,12 +1034,15 @@ static int av7110_start_feed(struct dvb_demux_feed *feed)
 			if (demux->filter[i].filter.parent != &feed->feed.sec)
 				continue;
 			demux->filter[i].state = DMX_STATE_GO;
-			if (demux->dmx.frontend->source != DMX_MEMORY_FE)
-				StartHWFilter(&demux->filter[i]);
+			if (demux->dmx.frontend->source != DMX_MEMORY_FE) {
+				ret = StartHWFilter(&demux->filter[i]);
+				if (ret)
+					break;
+			}
 		}
 	}
 
-	return 0;
+	return ret;
 }
 
 
@@ -1010,6 +1051,7 @@ static int av7110_stop_feed(struct dvb_demux_feed *feed)
 	struct dvb_demux *demux = feed->demux;
 	struct av7110 *av7110 = demux->priv;
 
+	int ret = 0;
 	dprintk(4, "%p\n", av7110);
 
 	if (feed->type == DMX_TYPE_TS) {
@@ -1022,26 +1064,29 @@ static int av7110_stop_feed(struct dvb_demux_feed *feed)
 		}
 		if (feed->ts_type & TS_DECODER &&
 		    feed->pes_type < DMX_TS_PES_OTHER) {
-			dvb_feed_stop_pid(feed);
+			ret = dvb_feed_stop_pid(feed);
 		} else
 			if ((feed->ts_type & TS_PACKET) &&
 			    (demux->dmx.frontend->source != DMX_MEMORY_FE))
-				StopHWFilter(feed->filter);
+				ret = StopHWFilter(feed->filter);
 	}
 
-	if (feed->type == DMX_TYPE_SEC) {
+	if (!ret && feed->type == DMX_TYPE_SEC) {
 		int i;
 
 		for (i = 0; i<demux->filternum; i++)
 			if (demux->filter[i].state == DMX_STATE_GO &&
 			    demux->filter[i].filter.parent == &feed->feed.sec) {
 				demux->filter[i].state = DMX_STATE_READY;
-				if (demux->dmx.frontend->source != DMX_MEMORY_FE)
-					StopHWFilter(&demux->filter[i]);
+				if (demux->dmx.frontend->source != DMX_MEMORY_FE) {
+					ret = StopHWFilter(&demux->filter[i]);
+					if (ret)
+						break;
+				}
 		}
 	}
 
-	return 0;
+	return ret;
 }
 
 
@@ -1093,7 +1138,7 @@ static int dvb_get_stc(struct dmx_demux *demux, unsigned int num,
 	ret = av7110_fw_request(av7110, &tag, 0, fwstc, 4);
 	if (ret) {
 		printk(KERN_ERR "%s: av7110_fw_request error\n", __FUNCTION__);
-		return -EIO;
+		return ret;
 	}
 	dprintk(2, "fwstc = %04hx %04hx %04hx %04hx\n",
 		fwstc[0], fwstc[1], fwstc[2], fwstc[3]);
@@ -1119,18 +1164,14 @@ static int av7110_set_tone(struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
 
 	switch (tone) {
 	case SEC_TONE_ON:
-		Set22K(av7110, 1);
-		break;
+		return Set22K(av7110, 1);
 
 	case SEC_TONE_OFF:
-		Set22K(av7110, 0);
-		break;
+		return Set22K(av7110, 0);
 
 	default:
 		return -EINVAL;
 	}
-
-	return 0;
 }
 
 static int av7110_diseqc_send_master_cmd(struct dvb_frontend* fe,
@@ -1138,9 +1179,7 @@ static int av7110_diseqc_send_master_cmd(struct dvb_frontend* fe,
 {
 	struct av7110* av7110 = fe->dvb->priv;
 
-	av7110_diseqc_send(av7110, cmd->msg_len, cmd->msg, -1);
-
-	return 0;
+	return av7110_diseqc_send(av7110, cmd->msg_len, cmd->msg, -1);
 }
 
 static int av7110_diseqc_send_burst(struct dvb_frontend* fe,
@@ -1148,9 +1187,7 @@ static int av7110_diseqc_send_burst(struct dvb_frontend* fe,
 {
 	struct av7110* av7110 = fe->dvb->priv;
 
-	av7110_diseqc_send(av7110, 0, NULL, minicmd);
-
-	return 0;
+	return av7110_diseqc_send(av7110, 0, NULL, minicmd);
 }
 
 /* simplified code from budget-core.c */
@@ -1992,76 +2029,84 @@ static struct l64781_config grundig_29504_401_config = {
 
 
 
-static void av7110_fe_lock_fix(struct av7110* av7110, fe_status_t status)
+static int av7110_fe_lock_fix(struct av7110* av7110, fe_status_t status)
 {
+	int ret = 0;
 	int synced = (status & FE_HAS_LOCK) ? 1 : 0;
 
 	av7110->fe_status = status;
 
 	if (av7110->fe_synced == synced)
-		return;
+		return 0;
 
 	av7110->fe_synced = synced;
 
 	if (av7110->playing)
-		return;
+		return 0;
 
 	if (down_interruptible(&av7110->pid_mutex))
-		return;
+		return -ERESTARTSYS;
 
 	if (av7110->fe_synced) {
-		SetPIDs(av7110, av7110->pids[DMX_PES_VIDEO],
+		ret = SetPIDs(av7110, av7110->pids[DMX_PES_VIDEO],
 			av7110->pids[DMX_PES_AUDIO],
 			av7110->pids[DMX_PES_TELETEXT], 0,
 			av7110->pids[DMX_PES_PCR]);
-		av7110_fw_cmd(av7110, COMTYPE_PIDFILTER, Scan, 0);
+		if (!ret)
+			ret = av7110_fw_cmd(av7110, COMTYPE_PIDFILTER, Scan, 0);
 	} else {
-		SetPIDs(av7110, 0, 0, 0, 0, 0);
-		av7110_fw_cmd(av7110, COMTYPE_PID_FILTER, FlushTSQueue, 0);
-		av7110_wait_msgstate(av7110, GPMQBusy);
+		ret = SetPIDs(av7110, 0, 0, 0, 0, 0);
+		if (!ret) {
+			ret = av7110_fw_cmd(av7110, COMTYPE_PID_FILTER, FlushTSQueue, 0);
+			if (!ret)
+				ret = av7110_wait_msgstate(av7110, GPMQBusy);
+		}
 	}
 
 	up(&av7110->pid_mutex);
+	return ret;
 }
 
 static int av7110_fe_set_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters* params)
 {
 	struct av7110* av7110 = fe->dvb->priv;
-	av7110_fe_lock_fix(av7110, 0);
-	return av7110->fe_set_frontend(fe, params);
+
+	int ret = av7110_fe_lock_fix(av7110, 0);
+	if (!ret)
+		ret = av7110->fe_set_frontend(fe, params);
+	return ret;
 }
 
 static int av7110_fe_init(struct dvb_frontend* fe)
 {
 	struct av7110* av7110 = fe->dvb->priv;
 
-	av7110_fe_lock_fix(av7110, 0);
-	return av7110->fe_init(fe);
+	int ret = av7110_fe_lock_fix(av7110, 0);
+	if (!ret)
+		ret = av7110->fe_init(fe);
+	return ret;
 }
 
 static int av7110_fe_read_status(struct dvb_frontend* fe, fe_status_t* status)
 {
 	struct av7110* av7110 = fe->dvb->priv;
-	int ret;
 
 	/* call the real implementation */
-	ret = av7110->fe_read_status(fe, status);
-	if (ret)
-		return ret;
-
-	if (((*status ^ av7110->fe_status) & FE_HAS_LOCK) && (*status & FE_HAS_LOCK)) {
-		av7110_fe_lock_fix(av7110, *status);
-	}
-
-	return 0;
+	int ret = av7110->fe_read_status(fe, status);
+	if (!ret)
+		if (((*status ^ av7110->fe_status) & FE_HAS_LOCK) && (*status & FE_HAS_LOCK))
+			ret = av7110_fe_lock_fix(av7110, *status);
+	return ret;
 }
 
 static int av7110_fe_diseqc_reset_overload(struct dvb_frontend* fe)
 {
 	struct av7110* av7110 = fe->dvb->priv;
 
-	av7110_fe_lock_fix(av7110, 0);
-	return av7110->fe_diseqc_reset_overload(fe);
+	int ret = av7110_fe_lock_fix(av7110, 0);
+	if (!ret)
+		ret = av7110->fe_diseqc_reset_overload(fe);
+	return ret;
 }
 
 static int av7110_fe_diseqc_send_master_cmd(struct dvb_frontend* fe,
@@ -2069,40 +2114,50 @@ static int av7110_fe_diseqc_send_master_cmd(struct dvb_frontend* fe,
 {
 	struct av7110* av7110 = fe->dvb->priv;
 
-	av7110_fe_lock_fix(av7110, 0);
-	return av7110->fe_diseqc_send_master_cmd(fe, cmd);
+	int ret = av7110_fe_lock_fix(av7110, 0);
+	if (!ret)
+		ret = av7110->fe_diseqc_send_master_cmd(fe, cmd);
+	return ret;
 }
 
 static int av7110_fe_diseqc_send_burst(struct dvb_frontend* fe, fe_sec_mini_cmd_t minicmd)
 {
 	struct av7110* av7110 = fe->dvb->priv;
 
-	av7110_fe_lock_fix(av7110, 0);
-	return av7110->fe_diseqc_send_burst(fe, minicmd);
+	int ret = av7110_fe_lock_fix(av7110, 0);
+	if (!ret)
+		ret = av7110->fe_diseqc_send_burst(fe, minicmd);
+	return ret;
 }
 
 static int av7110_fe_set_tone(struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
 {
 	struct av7110* av7110 = fe->dvb->priv;
 
-	av7110_fe_lock_fix(av7110, 0);
-	return av7110->fe_set_tone(fe, tone);
+	int ret = av7110_fe_lock_fix(av7110, 0);
+	if (!ret)
+		ret = av7110->fe_set_tone(fe, tone);
+	return ret;
 }
 
 static int av7110_fe_set_voltage(struct dvb_frontend* fe, fe_sec_voltage_t voltage)
 {
 	struct av7110* av7110 = fe->dvb->priv;
 
-	av7110_fe_lock_fix(av7110, 0);
-	return av7110->fe_set_voltage(fe, voltage);
+	int ret = av7110_fe_lock_fix(av7110, 0);
+	if (!ret)
+		ret = av7110->fe_set_voltage(fe, voltage);
+	return ret;
 }
 
 static int av7110_fe_dishnetwork_send_legacy_command(struct dvb_frontend* fe, unsigned int cmd)
 {
 	struct av7110* av7110 = fe->dvb->priv;
 
-	av7110_fe_lock_fix(av7110, 0);
-	return av7110->fe_dishnetwork_send_legacy_command(fe, cmd);
+	int ret = av7110_fe_lock_fix(av7110, 0);
+	if (!ret)
+		ret = av7110->fe_dishnetwork_send_legacy_command(fe, cmd);
+	return ret;
 }
 
 static u8 read_pwm(struct av7110* av7110)