V4L/DVB: ngene: Added module parameter "one_adapter"

If parameter "one_adapter" is set, only one adapter per device will be attached.
Otherwise an adapter for every frontend will be attached.
Signed-off-by: Matthias Benesch <twoof7@freenet.de>
Signed-off-by: Oliver Endriss <o.endriss@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/dvb/ngene/ngene-core.c

@@ -52,6 +52,10 @@
 #include "ngene-ioctls.h"
 #endif
 
+static int one_adapter = 1;
+module_param(one_adapter, int, 0444);
+MODULE_PARM_DESC(one_adapter, "Use only one adapter.");
+
 static int copy_eeprom;
 module_param(copy_eeprom, int, 0444);
 MODULE_PARM_DESC(copy_eeprom, "Copy eeprom.");
@@ -2444,9 +2448,9 @@ static void release_channel(struct ngene_channel *chan)
 					      &chan->mem_frontend);
 		dvb_dmxdev_release(&chan->dmxdev);
 		dvb_dmx_release(&chan->demux);
-#ifndef ONE_ADAPTER
-		dvb_unregister_adapter(&chan->dvb_adapter);
-#endif
+
+		if (chan->number == 0 || !one_adapter)
+			dvb_unregister_adapter(&dev->adapter[chan->number]);
 	}
 
 }
@@ -2472,17 +2476,18 @@ static int init_channel(struct ngene_channel *chan)
 		if (io & NGENE_IO_TSOUT)
 			dec_fw_boot(dev);
 
-#ifdef ONE_ADAPTER
-		adapter = &chan->dev->dvb_adapter;
-#else
-		ret = dvb_register_adapter(&chan->dvb_adapter, "nGene",
+		if (nr == 0 || !one_adapter) {
+			adapter = &dev->adapter[nr];
+			ret = dvb_register_adapter(adapter, "nGene",
 						   THIS_MODULE,
 						   &chan->dev->pci_dev->dev,
 						   adapter_nr);
 			if (ret < 0)
 				return ret;
-		adapter = &chan->dvb_adapter;
-#endif
+		} else {
+			adapter = &dev->adapter[0];
+		}
+
 		ret = my_dvb_dmx_ts_card_init(dvbdemux, "SW demux",
 					      ngene_start_feed,
 					      ngene_stop_feed, chan);
@@ -2527,7 +2532,7 @@ static int init_channels(struct ngene *dev)
 
 	for (i = 0; i < MAX_STREAM; i++) {
 		if (init_channel(&dev->channel[i]) < 0) {
-			for (j = 0; j < i; j++)
+			for (j = i - 1; j >= 0; j--)
 				release_channel(&dev->channel[j]);
 			return -1;
 		}
@@ -2545,11 +2550,8 @@ static void __devexit ngene_remove(struct pci_dev *pdev)
 	int i;
 
 	tasklet_kill(&dev->event_tasklet);
-	for (i = 0; i < MAX_STREAM; i++)
+	for (i = MAX_STREAM - 1; i >= 0; i--)
 		release_channel(&dev->channel[i]);
-#ifdef ONE_ADAPTER
-	dvb_unregister_adapter(&dev->dvb_adapter);
-#endif
 	ngene_stop(dev);
 	ngene_release_buffers(dev);
 	pci_set_drvdata(pdev, 0);
@@ -2595,11 +2597,6 @@ static int __devinit ngene_probe(struct pci_dev *pci_dev,
 	/*i2c_check_eeprom(&dev->i2c_adapter);*/
 
 	/* Register DVB adapters and devices for both channels */
-#ifdef ONE_ADAPTER
-	if (dvb_register_adapter(&dev->dvb_adapter, "nGene", THIS_MODULE,
-				 &dev->pci_dev->dev, adapter_nr) < 0)
-		goto fail2;
-#endif
 	if (init_channels(dev) < 0)
 		goto fail2;
 

drivers/media/dvb/ngene/ngene.h

@@ -24,8 +24,6 @@
 #ifndef _NGENE_H_
 #define _NGENE_H_
 
-/*#define ONE_ADAPTER*/
-
 #include <linux/types.h>
 #include <linux/sched.h>
 #include <linux/interrupt.h>
@@ -649,9 +647,6 @@ struct ngene_channel {
 	struct dmx_frontend   mem_frontend;
 	int                   users;
 	struct video_device  *v4l_dev;
-#ifndef ONE_ADAPTER
-	struct dvb_adapter    dvb_adapter;
-#endif
 	struct tasklet_struct demux_tasklet;
 
 	struct SBufferHeader *nextBuffer;
@@ -728,9 +723,6 @@ struct ngene {
 	struct pci_dev       *pci_dev;
 	unsigned char        *iomem;
 
-#ifdef ONE_ADAPTER
-	struct dvb_adapter    dvb_adapter;
-#endif
 	/*struct i2c_adapter  i2c_adapter;*/
 
 	u32                   device_version;
@@ -764,6 +756,7 @@ struct ngene {
 	int                   i2c_current_bus;
 	spinlock_t            cmd_lock;
 
+	struct dvb_adapter    adapter[MAX_STREAM];
 	struct ngene_channel  channel[MAX_STREAM];
 
 	struct ngene_info    *card_info;